SOVIET TECHNICAL MANUAL ENTITLED INSTRUCTION BOOK ON SERVICING OF THE PSBN-M RADAR BOMB SIGHT

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80T00246A069900080001-8
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 173
• Document Creation Date: December 27, 2016
• Document Release Date: February 19, 2013
• Sequence Number: 1
• Publication Date: October 1, 1963
• Content Type: REPORT

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CENTRAL INTELLIGENCE AGENCY '50X1-HUM
This material contnlm Information affecting the National Defense of the United States within the meaning of the Espionage
18, U.B.C. Bete. 793 and 794 the transmission or revelation of which in any m+nner to an unauthorized person Is prohibiter,
SSE -C-R-E -T 50X1-HUM
NO PO EIGN .DISS'%M
Soviet Technical Manual Entitled DATE DISTR. October 1963
Instruction Book on Servicing of the
PSBN-M Radar Bomb Sight NO. PAGES 1
REFERENCES
DATE OF
INFO.
PLACE &
DATE ACQ.
The manual was published in Prague in."'f?
50X1-HUM
2 copies
1 copy
1 copy
L copy
1 copy
2 copies
O "p
2 copies
2. The.PSBN-M radar bombsight is used with the optical bombsight OPB-6sr on
the IL-28 aircraft. 50X1 -H U M
tiA
ORR:
051:
Army:
Army/FSTC:
Navy/STIC:
Air:
Air FTD:
SAC:
D.FA: 6 copies
NSA: 5 copies
5
4
3,-
2
1
GNOUP I
t.duded I,.,. ouromml<
do.m0,odina and
d.da.dr.auan
o
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SECRET
NO FOREIGN DISSEM
INSTRUCTION BOOK
ON SERVICING OF THE
PSBN - M
RADAR BOMB SIGHT
(English Language)
0
WSW
NO FOR WON
DI$$
Excluded from evtonatiC
downgrading and
declassificat
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 50X1-HUM
4 ~' 6LifsuruS`fk~ Li'.iN:~Y ll ~xy
Instruction Book on Servicing of the
I'SBN-N Radar Bomb Sight
Prague 1958
168 mimeographed pages in English
No Foreign,Diesem
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 li it
6
I~ II
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INsTRUiTI0N BJOK
O N 5 R R V 1 0 1 N G ? 0 Y T Y8BNla
RADAR BJHB'BIOUT
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S-E-C-R-E-T N
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50X1-HUM
TER I.
iITCHINO AND PERFJaLANCE CHEGINO OF THE PSBN M RADAR AM SIGHT. .
Q 1. Switching of the Eguipuont.
Before switching on the Aador bomb sight, the following
measures must be tr:icenz
a) Chock of the correct and .?alioblo,connection of cables to in.
dividual units ( the number on the ccble connector must corres-
pond with that on the terminal of the respective unit);
b) The external appearance of the units is to be inspected as to
absence of damages.
In th., aircraft inatalle c'. equipment is inapocted, use a 27 V
power -source of minimum,) kW power for both the PSBN-M radar bomb
eight and the MA-15JO K power convertor ( for example the thick-in-
stalled generators of the APA-2, APA-7 or ST-182 types). The radar
bomb eight must never be supplied from the air-field accumulators
or ground starting-cart. Also the supply of the radar bomb sight
from the motor-driven airborne generators is prohibited during the
operation of the aircraft engines on the airfield.
The equipment is turned on in the following sequence:
1) Set all eonLrole of the radar bomb sight in the initial positions
according to Table I.
T A B L .&__I.
Positions of controls of the PS13N-M radar bomb si t e ui mant
previous to switching
trol unit
(Unit No?lo)
Unit Doscriptiola of the Initial
position of
control ttu control
Control panel ,
Of the power
convertor (Unit
140.21 A0,
Timer and con.?~
"Power oonvertor in-Off* Off
switch
"Mains voltage regulation" Extreme left
control position
"PJwer mains 27 V-115V" "Off"
switch
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"Tranomittor heating"
switch
"Transwittor high vol-
tage" push-button switch
"Beacon-+Scanning" switch
"Time gain control" knob
"Tube switch"
"Calibrction maxking"
switch
"Manual-Automa tic" switch
"Antenna control"
switches:
a) "3n-Off"
b) "Slow-fast"
"Rectifier current-
Magnetron currant" switch
"Detector current-
'Power supply chock"
"Rang,3 in km" switch
"Expanded scope 10-60"
control
"R.F.g..in" control knob
Computing mecha- "Expansion of the center
nism (Unit No.8) in km"
"Range" control knob
"Off" -
center
Scanning
Extreme left
"1"
"10km'
$$off"
"Slow"
"Magnatron current"
"Power-supply check"
w10-63"
.Extreme right
Extreme left
"O"
Extrreme right "0"
(according to the
nomogram)
Extrama left
Plan-position "Brightness" control knob
indicator (Unit No.?)
Sector scanning
control panel
(Unit No.12)
Azimuth stabili-
zation Unit
(unit No.5)
"Focus" control knob
"Sector-scan-Continuous
rotation" switch
"Compass-. eleyn zero-
Jpticol bomb sight"
switch
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center
"Continuous rotation"
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Control panel on "R.f, gain" control knob Extreme left
the PPI unit.
(Unit No.36)
fotartiometer "Expanded scope 10-60" Extreme left
control p..nel control knob
"hero range-Calibration- "Jperation"
Operation" switch
2) Connect the aircraft eloctricc,l nutwork to-the airfield D.C. po-
war ixAina.
3) Set the "Power convertor Jn- Jff" switch ( on the power convertor
control panel) to the position "On".
4) Set the"power mains 27V-115V" a-witch of the tLuor and control
unit to the position "On" and after one minute turn on the "Trans-
mitter heating" switch. The pointer of the "Voltage control" meter
should deflect to 115 V, i.e. to the middle of the red sector on
the scale of the meter. If necessary, the volt::ge may be regulated
by means of the "Mains voltage. regulation" control knob.
Be sure that the "Voltage control" meter indication installed in
the timer and control unit 'corresponds to that of the A,C. volt-
meter, installed in the receptacles of the control panel of the po-
wer convertor. Should both indicated voltages differ from each ot-
her, the power convertor voltage hao to be regulated by weans of
the ^.C. voltmeter.
5) By moons of the "Brightness" and "Focus" control knobs on the plan
position indicator the respective values of brightness and focus
of the PPI screen should be regulated.
6) five minutes after the switching in of the transmitter heating ?,
the "Tronsmi'tter high voltage" push-button a itch has to be pres-
sed and again. released. According to the kind of operation the
other sc.itchea and controls ohavld be oat to their reapoctiv,; po-
sitions immediately after the' transmitter heating is av.itchod in..
The radar bomb eight equipment is disconnected in the reversed
Sequence, i.e. first the "Transmitter heating" switch is opened,
then the "Pov(er mains 27V-115V" a itch and finally the "Poworw
Convertor On-Oft" switch. The high voltage of. the transmitter is
disconnected tty the "Transmitter heating" switch. Afteruthe equip-
ment is switched off, all controls should be set back to their
respeotive iniSial..msitiona-accordine to_Table I
11 :
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 50X1-HUM
6 2. Check of the operation of the nador bomb eight aboard the
II.'-28.aircraft.
1) 'onnezt tt Y aircraft electrical system to the airfiele power
mains ( for example AIIA-2, AIIA-7, CT-182).
2) On the electrical instrument panel of the navigator poet connect
the automatic protection (AFS) "Voltmotor". The "Accumulator
switch" to be sot to the position "Off". Set the D.C. voltmeter
switch to the position "mains network" and the "Radiocompaca-
Radar" switch of the a.C. veltAr;ter to the position "Radar".
3) Be sure that the voltmeter in the olectrical inotru;aent panel.
at the navigator's post indicates the voltage of 27 V in the
aircraft power-uuina network.
4) Switch in the automatic protection AZS "Wave-guide pump". On
the control panel of the air puiap the "Heating" signcllitig lamp
hoe to light up, and the heating system of the air pump is tur-
ned on. This system is used also for heating of the horizontal
and vertical rotation joints connecting the feeder with the an-
tenna. At the ambient air temperature balow -10?C, the heating
system ( aZS "Woveguide pump") must 'be put into operation 10-
15 minutes previous to switching in of the other units of the
PSBN-M equipment,
5) Put in the operation the Ma-15JJK power-convertor by moans of
turning the "power-conventor On-Off',switch to pnaition "On".
The A.C. voltmeter (EV-46) installed on the'lecti.cfl instrument
panel of the navigator's post :lust indicate a voltage of oppro--
x1matoly 115-120 V.
6) Set the "Power mains 17V-115V" switch to position "On".
7) After 30 to 60 seconds the "Transmitter heating" stitch should
be eat to position "Jn". On th,: scale of the Woltage control"
meter installed in the timer and control unit check the A.C.
voltage of 115 V (within the limits of the red sector on the
meter scale). By turning the "Mains voltage regulation" control
knob on the power-convertor control panel the uame?irrlioation
should be obtained on the scale of the control meter on the
timer and control unit and on the I..C. voltmeter (EV-46 on the
electrical instrument panel at the navigator's post.
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4 No Foreign Diesem 1;a
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C
nu rva cigu sire. ocw
8) Bring the antenna into rotation by sv.itohing in the "50X1_ HUM
control Jn-Jff" switch to the position "On".
9) By means of the "Brightness" and "Focus" control knobs on the
9ront panel of the plan position indicator the sweep trace on
the screen of the PPI tube should be adjusted in ouch a way
that a narrow and well visible trace is obtained.
the screens of the PPI tube and the cursor on the light filter.
should not be the beginning of the sweep in the correct position,
the axles of the "PPI horizontalilar vertical centering" should
be adjusted to pej,the beginning o Y the sweep to the cursor
of the light-filter ( the axles of the potentiometers are acc es-
sible from the front panel of the timer and c.)ntrol unit). Du-
beerved in
a eye on the
center of the cursor
of the light filter inntellarl nr
+,.... 4n 4 nu+nn
light fiber glass reflects exactly in
such a way that the mirror image of the op
panel, and chock ( by means of the antenna-tilt indicator on the
timer panel) the antenna-tilt angle change.
( from the increased speed of rotation of the sweep line on the
Screen of the plan position indicator) the change in antenna ro-
tation speed. Is %
aition "Continuous rotation" and the "Slow-Fast" switch to the
position "Slow".
15) Cherie the manual control of the antenna rotation t:pr pressing the
"Right-Left" stitch on the timer and control writ. The sweep on
the screen of the plan position indicator CRT must rotate in the
corresponding direction.
"Sector scan" and chock the sector sweep of the antenna in the
respective sectors with various positions of the sector sirith
on the sector control panels
unit and the CR!' of the plan position indicator check the pre-
Sence of the. calibration markers on the respective. CRT screens.
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 r'or this sot auccossivoly theme' -.oration marking" w itch to
the positions "2 km", "10 km" and "20 km". The calibration
markers will be presented as pipe on the monitoring ORT and in
form of bright spots on the sweep of the plan position indica-
tor CRT. With a rotating antenna they take a form of circles.
Be sure that no vibration of the calibration markoro is visible.
17) Set the "Calibration marking" switch to the position "Ri". In
this position, two pulses must be presented on the CRT screens,
viz.the measuring pulse and the pulse of the trunevureal marker.
In tha position "Off" only one measuring pulse is visible.
18) Check the performance of the range measurement channel by turn-
ing the "Range" control. knob o: the computing mechanism. The
measuring pulse must move along the sweep on both CRT screens
.
19) Turn the "Tube switch" to the. position 110. "4", and chock the
frequency division lt5 in the range unit.
On the screen of the monitoring CRT four small two-kilometer
markers must be visible between the two neighbouring greater
ton-kilometer markers, if the pur'ormance of the frequency di-
vision circuits is correct. Should more or loss than four of
the small aiarteia be visible, tha ratio of 1:5 Of the frequency
division must be adjusted by turning the axle of the R408 po-
tentiometer "1:5 division adjustment"; the axle is accessible
from the righthand aide panel of the marker and control unit.
Turn the "Tube swicth" t.) the position "1".
20) Turn on the antenna rotation system and inspect the scales 0.
rungs display in the following way:
a) turn the "Calibrator marking" switch to the position "10 km"
and the "Range in km" switch to the position "loo". Exactly
ten. ten-kilometer sections oeparatod by calibration circle
markers should be presented on the ocroen of the plan.posi-
tion indicator. If the range differs from that of 100 km, the
axle of the "Sweep control" potentiometer ( accessible from,
the timer and control unit front panel) must be turned to ad-
Durst the exaot 1JJ km range.
Should the sweep be too short or should it s'arpuss the screen
Of the ;lag position indicator, the axle of the "Swoop am -
Plituds" potentiometer must be turned to obtain n nweup cor-
responding to the radius of the PPI screen. This axle is so-
S-E-C-R-E-T
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cossible from the front panel of the timer And control unit.
the "Range in km" switch to tho'position "203"; from the: call..
bratioft circle markers find the length of the sweep length
which should be between 190 and 210 km. I
o)Sot the "Range in km" switch to the Position"lU-6U" end turn
the "Expanded scope 10-60"
control on the control panel to
its bxtreme position in ainti-olockwiao direction. Set the "Ce+
libration marking" switch to the position "2 km". Shift the
and check by the 2 km ::arkera the range indicated by the sweep ';
which should be from 7 to 9 km.
d)Turn the "Expanded scope 10-63" control knob clockwise to its
extreme position and set the "Calibration marking" switch to
the position "10 km". Correct tire sweep scale according to car.,
libration maricors (55-65 km).
1) Set the "Detector current- Power supply check" to the position
"Detector current". By turning the "Receiver tuning" control knob
the maximum magnitude of the detector current should bo checked;
it should be from 0,4 to Q,9 ma.
22) Turn tha "Rf. gain" control in clockwise direction to its erg
treme?position; in this position the noise ( "grew") will be.
observed on the screen of the monitoring CRT. The brightness of
the sweep trace on the screen of the plan position indicator tu-
be will also increase. By turning the shaft of the "Calibration
marking" potentiometer the standard brightness of the calibra-
tion mailcere should be adjusted now to be distinctly noticeable
on the background of the noise.
3) Be sure of the presence of the course :aarker on the screen of
the plat, position indicator tube; this mentor should point iii
the zero direction of the azimuth deals. When necessary the
brightness of the course marker can be adjusted by means of the
"Course maric..bvightness" potentiometer.. ' ..
24) Check. the- correct,porformanoe of the system of azimuth stabili--..":
sation.by o tting,the, stitch placed .on the ezZtmitti atabi]izetiort =
poei83on'6rid. indiate.* the compass Couroa. of. the Siroraft.
;`$e4'the flttob' oli the" azimuth' stabilization unit to position `.
"SoleyA=asiu";.-The ,course maricer'should ahnnga against its poai
S-E-C-R-E-T
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 tion t o "Zero" on the uai:iu'th ocale of the plan poaitl-- ' - - t o r
r!
tour or rive minutes ulcer Having curneu on the Lrvrrunuccor
heating" switch the "Transmitter high voltske".ou'ah-button owiteh.
should be pressed and reloasod, 'rZ
Ji, tha screen of the monitor CRT-a puloo should nppaar, and on the' y
screen of the plan position indicator a bright spot should be vi-
aible at the beginning of the sweep.
The wa,,nituds of the average current of the ma'snatron has to, be
chocked now by a meter situated on the panel of the timer and. corr.'
trol unit; the respective avitch should be set to position " Meg;
rtetron current". The current monaured should. be 6 to 8 ma in po- .a
oi'tion "10-60" of the "Rano in km" switch, and 10 me in position
"100" of the aamo switch.
Set the "Rectifier currant-atagnotron current" to position "rac-
tifier current" and measure the current of the iractifiur. TT.liio
current must not uurposs the pzoper magnet on current by more than
5mn.
.hou]4 the ""Ia;;nutron current" meter indicate no currant at ail,
or should, the moonure current differ coraidoruhly'fram th_ Lbove "
mentioned values the high volte gu of the tranrnittor merit ' o tar -
ned off immediutely. The enT.o must be done if the po+ntor of the
meter oscillates often and nbniptly or if the current of the roc-
tifier considurcbly exceedo that of th0 magnotn n. The ` i,,h volta-
ge is immediately switcheC of, by means of the 'Trrnvnlttor hbct-
ing' switch, and ahatly afterwards this. switch should b^. turned
on again. If the tranr'mitter performance is still inadaq;.wto, the
whole equipment must be inspected and repaired if nacessarvo
8) The opuration of the system of continuous sweep doles hue to ba
impacted on the "60 km" scale. This is done by means of turning
the "Center expansion" control knob installed o'i t::a panel of the.
computting mechanism unit. Whon turning the "Pxpanuion of the
center in km" control :snob its clockwise direction to its extrame
position "-20 km" the pulse of the transmitter'( the bright cirol?)
eluuld move frolL the baginnirg of the oveep on the ocraor. of ? th::
plan position indicator CRT' towcrds the canter of ttto swoop by at
least 15 km.
Whoa turning the "Center orpanuion i.i km" control knob to its oz-,
tromp 'position in anti-clockwise direction (i?.e. +.;0 kn.), furthar
four to-kilometer circular range m'ui:ara should follow the tran-
mittar pulse marked into the center of the CRT acreo'z.
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I au roreign ui"eem
The 10-15 km sweep ratio has to be adjusted by moans o0Xclne UM
"Expanded scope 1J-60" control knob. The "Center expansion in km"
control kcnoh has to be adjusted to such position in which the
transmitter pulse marker has the form of a small circle close
3) Chock the operation rango of the "Time gain" control, For this
it is nsooseary to adjust the sweep range of 4J-63 km and to
2) Preliminary alltitudo tuning of the klystron is to be inspocted
now. This is done by turning the "Receiver tuning" control knob
in clockwise direction until the maximum amplitude of the reflect
ad signals is obtained. The indication of the pointer of the de-
tector current meter should be noticed. The "Receiver tuning".
control knob should be further turned in clockwise direction un-
til the pointer of the detector current motor indic:;too maxim=
of the current.
The preliminary altitude tunin? is correctly performed if with
turning the "receiver tuning" control in clockwise direction th'?
eppearence of the maximum reflected signal on the CRT screen pro-
cedes the maximum indication of the detector current meter. The
magnitude of the detector current, corresponding to the maximum
amplitude of the reflected signals, should be some 75-?5.% of
the maximum value of the detector current.
J) Cut off the antenna rotation and turn it towards the targets.
adjust the antenna tilt angle to 00.
1) Turn the"receiver tuning" control knob, until reflected signals
are presented on the monitor CRT in form of stable pips surpass-
ing the level of the noise. Jn the screen of the plan position
indicator CRT the display has a form of bright spots on tha
sweep trace. If no reflected signals are presented, th., maximum
detector current should be adjusted and the "Receiver tuning"
control should be turned in anti-clockwise direction until the
pointer of the meter indicatk a current dacj??aased by J.1=0,2 me
from the ms..imum current value. Than the "Left-Right" push--but=
ton. switchshould be pressed until a weak display of the reflec-
ted signz is eauld bo visible on the CRT screen. By means of the
"Receiver tuning" control knob and the antenna tilt control knob
the maximum amplitude. of the pipe on the screen of the monitor-
ing CRT ( or the maximum brightness of the reflected signals die-
play on the PPI screen) should be adjusted.
to the beginning of the sweep.'
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 i - 11 -
turn the "Time gain" control knob in clockwise direr 50X1-H U M
extreme position. During this adjustment the indication of the
noise an the screen of the monitoring CRT within the range from
15 to 20 km irom the transmitter pulse display should be absent,
and afterwards it should continuously increase. The 4'eflected
,signals should be considerably weakened, in the vicinity of the
transmitter pulse display.
4)Incpect'the per.orwance of the autmaatic frequency control by
waans of turning the "Manual-automatic" swicth to position "Auto-
matic". The display on the CRT screen display as well as the
magnitude. of the detector current must not be substantially chan-
ged. If the indication of the "Detector current" meter duacr?aaea
and the display of the rvflectod signals on the CRT screens die-
appears, the "Time in control" knob should bu adjusted to ob-
tain a reliable indication o the raptor pointer and an adoquat,
display on both screens.
35$et the "range in km" switch to position 't1JJ" and chock the por-
formanee of the circuits of the step delay o the beginning of
the sweep. For this the"Sweep delay x 1J km" switch should be
succeuivuly adjusted in'ateps to all positions up to position
"2.". The step sweep delay is correctly adjusted if the range
display is maintained in all positions and the x sweep is relia-
ble. In position "24" the brightness of the sweep is decreased.
Lt the same time thu frequency dfeieion or 1:13 in the range
unit ie to be checked. In the 1JJ km uealo the transmitter pulse
on the That to-kilomotor marker appears in position "16" of the
"Sweep delay" switch. This pulse will move discontinuously in
steps of 2J km towards thv beginning or the swe.:p. In the 203
km sweep ratio the transmitter pulse merkor appear-s on the 20th
ten-kilomotor marker in position "6" of the "Sweep delay" con-
trol
36) Inspect the operation of the air pump. For this chock the "Auto-
matic protection" switch on the control panel of the cir pump
as well as the 45V "Wavoguide pump supply" a itch are to be
turn on. Doing this, the "Pump" signc.l.ling lamp situated on
the control panel should light up. After one or two minutes the
signalling lamp should go out as the pump is autom::tically tur-
ned off. The pressure-range in3tallod in the antenna assembly
of iha aircraft and closed in the pump system should indicate
No Foreign Diseem i ....
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I .. .1 flu ruaui,yu ulnocw
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a pressure of 1 - 1,2 atm. 'ilia automatic operation o150X1-H U M
should start again ( the signalling lamp "Pump" lights up) of
ter a period of at least 15 minutes ( not before this time).
Inspect tha perforwanoe of the oaupling unit of the optical
bomb eight N.JPS-t or in the following orders
a) the sweep ratio "8km" should be adjusted and the antenna
rotation mechanism turned on.
b) the avitch on the azimuth stabilization unit should be set
to ,osition "Jpticul bomb eight" (JPB). On the careen of f"6
monitor CRT a transverse mark should appear, placed in the
middle of the sweep line and on the azimuth scale a longitu-
dinal muric uhould be visible, Cut off the antenna rotation
system.
o) adjust the zero angle of sight on the optical bomb eight;
also the delay introduction lever should be adjusted to ze-
ro level. Turn the optical bomb eight so that the drift an-
gle on the scale of the course stabilization of the ..IL-5
auto.Detic pilot is zero. Note the position of the sweep tra-
ce which is to be considered as zero position ( the supply
of thu optical bomb eight should not be turned on during
this checking).
d) turn the optical bomb sight by 15? from the 0? position on
the drift angle in clockwise direction.
The plan position indicator sweep trace should move in anti-
clockwise direction by an angle of 153 ; 0,5?.
e) Deflect the optical'bomb night by 15? from it6-0? position
in anti-clockwise direction. The sweep trace on the plan po-
sition indicator screen should deflect in olockwise direotion
by as ankle of 15? i 0,5?. :prom the zero pasition. Fix the, optical bomb sight is the nsition correuponiing to the sere
drift angle,
f) Deflect the optical bomb eight by 15? on the drift angle
scale in an arbitrary direction and write down the angle of
the sweep deflection. Adjust the male of sight.of the op.
tical bomb eight to 20.5? and introduce s delay of 203/1000
on th? delay introduction scale. after this adjustment the
sweep trace should be further deflected by an angle of 8?
00500
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 scope of the optical eigt must be ]asked, and the optical
bomb eight must not be energized,
8) Cut off' the power oupply of the radar bomb sight by turning off
the switchnes in the following sequences "Transmitter heating",
"power mains 27V-115V" and "Power convertor On-Off". Set all
the evitchnes in their respective initial positions according
to instruction given in Table 1. Cut off the power supply of 'the
pump and set the "Waveguide pump" automatic protection switch
"AZS" to pooition "Off"."
The inspection of the performance of the radar bomb eight in-
stalled in other aircraft types is done in the same order, ex-
cept Item 2 of this par6gruph. The power mains network of the
aircraft is to be connected in accordance with the circuit dia-
gram of the respective type.
3. Inaoeotlon a $ oalibr Lion of the couoliruk If of the OPV-her
airborne bomb sight
Y\4.YJ?nane marx.
1) Energize the radar bomb eight, and after some 15-20 minutos set
the switch on the azimuth stabiliz:,tlon unit panel to the posi -
tion "Jptical bomb sight".
2) set the "Range in km" si.itch to the position "10-60", the switch
of the monitoring CRT to the position "1", and the "Sweep delay"
switch to position "Zero". The "R,Be gain" control knob should
be turned in anti-clockwise direction to its extreme position.
3) The sounning-sector e~.itches on the control panel of the sector
scanning unit should be met to their respective positions to ob-
tain the front 'scanning sector of 600 angle. The"sector sconn-
Continuous r6tation' switch should be set to position "beater
S-.E-C-R-E-T I,a
No Foreign Dissem
~;Y I
tion". By this adjustment the two-kilometer marlcc50X1-HUM
be visible on the both CRT screens. Check the onlibrotion
of the coupling unit of the optical bomb sight on the ca-
libration markers, and, if necessary, adjust additionaly
the unit ( according to instruction in ? 3 of this chapter).
Before checking the performance of the coupling unit of the
CIIB-6cp, the optical bomb sight system has to be inspected
g) but the "Jperation-Cali. bration" switch 'to position "Calihrp.
and adjusted. During the inspection of the system the gyro-
 I n T n n ll m I
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?w rvi cage yLCCQW
.._` .__ S-E-C-R-E-T
No Foreign Diseem i
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a:anning" cand the ontunna rotating system should be st50X1-H U M
aition "Fast". Jn,the soroen of the plan position indicator CRT
a longitudinal marker should appear in the zero angle position
of the azimuth scale. If this marker does not point towards the.
zero ruferenco of the scale, four screws holding the deflection
coil of the PPI tube have to be partly released, and the o,il
hau to be alowly turned and installed in a position in which
the longitudinal m;:rkor points exactly to tha zero angle of the
ozimuth scale.
Turn the "Expanded acope.10-6J" control knob on the respective
control panel in anti-clockwise direction to its extreme position
and check the position of the transverse mez1ur which ehuuld be
placed in the middle of the sweep panel within th. limits of
1 km.
Chuck tho position of the contra line of the front scanning see-
tar in rotation Ito the longitudinal masker. The centre line of
the front scanning ouctor should coincldo with this marker vdtu
an admisuuiblo tolerance not exceeding 5: (The measurement is
purfo naud by moans of the rotating career on the filter on the
PH tube; the dark sector of thu screen is not taken in account
in this measurement).
1) Sot the "Jporo.tion-Calibration" switch to the position "Calibra-
tion". In this position the two-kilometer matters must appear
on the screen of the monitoring tuba and of the plan position
indicator tube.
2) but the maximum sweep ratio. Tho angle of eight of the optical
bamb. eight should be adjusted to zero.
3) Switch in the transmitter by pressing the "Transmitter high vol.
toga" push-button switch, andset'the antenna system to fast
scanning in the front sector.
4) by means of the "Altitude: handle of the optical bomb eight an
altitude of (Z-a) kjn is to be adjusted, where "a" is the con.
etant error in the rungs measurement. The altitudes at which
the calibration is to be done as well ss the value of the can-
 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
no roreign uiesem
- 15 -
ut.:nt error in the re, 50X1-HUM
ngo measurement are given in si t.+cie xaero+
nod on the coupling untt of the aptical bomb sight.
Turn thu "zero range udjuatment" control knob to adjust the
first two-kilometer circular marker on.,the PPI screen next to
the transmitter pulse marker to oainoide with the trensverve
marker. This coincidence in abtained by shifting the outside
centaur 3f the transversal marker with'the inside contour of
the two-kilometer circular marker ( see ftg.1).w
?ig.l. Display on the indicator screens with the calibration
ai the coupling unit of the aptical bamb sights
Upper parts Display on the PPI screen
lower pert, Display on the monitoring ORT screen
Lefts Before coincidence of the two markers
Rights After coincidence of the'two markers
1 -the two-kilometer marker
2 -the trunavarse marker
6) Adjust the altitude of ( 1-0/2) k.. and the, angle of sight of 60?.
13r this the first two-kilometer circular massed following the,
transmitter pulse display should coincidn with the transverse
marker. If the ooincidance, is not accurate, the axle of the
"Mange stabilization adjustment" potentiometer should be turned
to obtain the necessary coincidence of the tranavorse marker
with the first two-kilometer range marker. The oulibmtion is'
to be checked in the position of HQ-a km, and s3 a,
No Foreign _Diesem
 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246A069900080001-8
I i i nv I US cinu ./1""CIII
t the "altitude" control knob if the iptical bomb eig50X1-HUM
f 4j 'rte ",1r ximum altitude Ix)Justmunt " cintrol knob t3 obtain the
1J-u) kin with an endle of eight of 00, as wall as at ( 10-0/2)
m with all angle of night of 600.
luck the calibrt,tiin ineo more at the altitudes if (2-a) km and
rd (1J-a) km, ?ond ..also at (L.)-012) km with an angle of sight
or ( the tenth circle frim the transmitter pulse display).
traneve'so m:ricer with the tenth two-kilometer circular war-
Juut the "altitude" control knob of the Optical bomb eight t)
iition (la-q/2) km, and the angle of eight control knob to a
orwvorse nk;ltcur.
d)inciddneo of-thu fifth two-kilometer circular marker with the
CC''` t) inotructione in Items 5,6,7 and a of this paragraph.
are at the abive given altitudes .ud angles of eight ( with an
tlut the "Jperntion-Ualibrution" switch to the position "Operation"
Turn the optiool bamb eight in clockwise direction by an angle
of 153. The sweep on the screen ui the plan position indicator
CRT should defluct;. by an angle of 150 1 l0 in anti-clockwise
direction. Should be Obtained duflactiin of the sweep trace ax-
coed the limits of 150.1 10, the eovor of the caupling unit of
the Optical bomb eight should be removed and the shaft of the
101 potentiometer has to be adjusted to shift the sweep trace.
Sight a)uuld be net to 7J?..
Left-Right" push-button avitch and adjust the swoop trace to the
S-E-C-R-E-T
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 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
{ .I No Foreign Diseem
- 17 -
the co.rroct position. ( the potentiometer is installed on the
Z "'is of the coupling unut of the optical bomb eight). Then
u iptical bomb sight should be turned by 30a in anti-clockwise
4irection and the position of the sweep trace should be checked.
50 ; t0 of the azimuth scale. If necessary, the sweep line can
je adjuatud to the correct position by moons of thu R)5 poten-
tiometur installed an tha chassis of tha coupling unit of the
'optical bomb sight. Nosy the optical bomb sight has to be turned
.jcgoin by 3Jo in clockwise direction and thu ..ngla of ttu deflec-
tion o the sweep trace should be checked. If necessary, the ad-
juatm?nt has to be performed by Boons of the F01 potentiometer.
The adjuetaant by moons of the RJ5 and 101 potentiometers should
ba repeated untill the sweep trace is plcced in the respective
correct position.
dow the accuntncy if thu course channel tranvmisaion-of the angle
of deflection of the optical bomb sight to the pan position in-
dicator.ie to be inspected. For this reason the optical bomb
sight hce to be turned in twa-degree stops from the zero angle
to 10? tnd further in steps of 5 d:greos to 30 ?.
The error in tha doflactian angle transmission through the cour-
as channel of th.! coupling unit of the opticaa bomb sight should
be less than J,53 with drift angles up to 10? and less than 1?
with drift angles from 130 to 3Jo, Should tha zrror in any of
tho inspected positions surpass the admissible m..:gnitude, the -
compensation of the excessive error may be obtained by adjusting
the 101 and 105 potentiometers. By this compensation additional
increase of the error may take place in Some other positions.
However, the compeneation iu to be done in such a %.qy that the
error be within Via admissible tolon:nees in all of the positions
checked.
This inspection iu to be dons in both directions of the optical
bomb sight, viz6 in the olockwiee as well as in the anti-elock-
wiae direction.
After the course channel is adjusted, the initial zero position
of the course channel hoe to, be checked once more ( sea por.4).
8_E-C-B-E-T -.. -?- ... L'
No Foreign_Diseem
to -- - -----,-- ~>:1 1 I '
Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
. nu rurrigu uibacni
01
la -
C
the PSBN-M radar bomb sit (Ad1u_tm nt of the radar b.amb eofaht)
Chock the position of the course mortar of the radar bomb sight
in reference to the longitudinal axis of the aircraft in the fol-
lowing wgyi
` pection and ad.tustmont of the transverse etabilizt50X1-HUMnel.
Ott the drift angle of the optical bomb eight to 0?. Also the
t to zero position.
J
? ch_ngod from J? to 7J? and thu swoop trace on the plan poaiti-
a indicator CRT has to be checked as to the etebility of its
sition. If the st..bility i~ not euffieiont, the position )f the.
ojweep trace with the angle of eight of 73?,is to be noted. Now
is angle of eight of 20? in to be adjusted, and by turning tha
xlo of the "Zero bank adjustment" potentiometer the sweep trace
Is to be act to the position in which it was noted with the angle
If eight of 700. Zion the adjustment of the zero bank should b
e
checked again and oupplumontary correction should be performed,
f
If' necessary. The above described adjustment is repeated untill
!the sweep trace an the screen of the plan poaftion indicator is
stable within the change of the angle of sight between 20o and
7Jo.
Turn the optical bomb sight in clockwise direction by an angle
of 15 ?; the sweep trace on.tho pl..n position indicator should
move in anti-clockwise direction by the same angle. Now adjust
the angle ad sight of 20.5? and by means of the lover installed
on the optical bomb.aight introduce a delay of 203/1000. During
this adjustment the swoop tracu of the plan position indicator
CRT should further turn by an angle of 8? i 0,5? in anti-clock-
wise direction. If the daflection angle is greater or smaller
than the above mentioned deflection, tha angle has to be adjusted
to a? by turning the axle of the "Transverse stabilization ad-
juatmunt" potentiometer.
Chock the operation of the tranavoree stabilization chnnnol whi-
le tha optical bomb night in anti-clockwise direction as descri-
bed in Item 3.
4. Inspection and zero course odiustmont of the oervbmechanism of
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'
 no roreign Liseem
wl
50X1-HUM
Two plummeta should be hung from the checking points on the
longitudinal axis of the aircraft, viz one from the nose at
the aircraft and the other from its toil.
Stretch. a cord of 25-30 m lonGht along the longitudinal aids
of the aircraft so that a part of this cord of .10-15 m' io
placed in the front of. the aircraft nose.
adjust the )ptical bomb eight in the zero drift angle posi-
tion, ?.nd set the delay introducti)n laver to zero position.
Turn the "angle of sift" handle of the optic::l bomb eight
and check the shifting if the course mark in the visor of the
optical bomb. sight with respect to the stretched cond.
Turn the optical bomb sight so that the carrier reflector coin-
cides with the course mark of t'io optical bomb eight. The drift
bet to len,thenina control of the. iptical bomb sight and turn
the angle, of sight handle until the corner reflector uppoars
in the field of viuion oA. the optical bomb eight. If the frame
of the cabin-window obatructo the eight, the rose of the air-
craft must be elevated by installing a Jack under the nose log.
of the aircraft under-carriage,
couroe mark should move along the line .)f the stretched cord,
or slang a parpllel line. The maximum admissible value of
diver3ency of the course mark is 7 - 15 minutes; should it bo
greater, the optical bomb sight has to be re-adjusted.
Cut )a the power supply of the reader bomb sight and check the
position of tha longitudinal mark as wall as the operation of
the course end transversal stabilization channels ( see instruc-
tion in par. 3, i.,C,D,).
Install the corner reflector at a distance of 800 to 1200 meters
in front if ti: aircraft at an angle of 50 - 70 to tee loft oi?.i-
do of the longitudinal axis of the aircraft. The none of the
aircraft ehsuld be slightly elevated ( by an angle of 40 -50).
Cover the aide openings'of the nacelle in the front strut of
the aircraft.
Turn the optical b:imb eight in the direction of the corner re: -
flector. During thin the gyroec)po of the optical bomb eight
dust be lockgd, the delay must be zero, and the "Altitude" can.
trol knob mrot be jet to its :iinimum :;ltitudo position.
B-E-C-R-E=T
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 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
( aw a ca crb,a uanu mu
- 20-,
ngle on the 'optical bomb eight should be 50 to 7?.50X1-HUMLs
juotment. In orthor case move thu corner, reflector in'another
t on the fast-scanning mechanism of the antenna system in the
rant scanning sector ( the switch installed on the panel of the
azimuth stabilization wilt must be set to position "Optical bomb
]i&t"). The "Expanded scope 10-63" control in now used to adjust
%ho sivuep ratio of 8-13 km-. The angle of sight on the optical
mb sight is to be adju..tod to :ro.
t. on the transmitter high voltage and obaorve the screen of the
Ian position indicator CRT for th,; display of the reflection
,ltingui?h from the other " targets", the corner reflector must
la folded down (or deflected in azimuth by 90?-263?) and than
ame as tho.angle rdjulted ,according to Item 7 of this paragraph.
f the initial zero adjustment of the course channel is correct,
the :iioplay of the corner roflector signal must be placed on the
longitudinal marker. If this is not eo, the following measures
ust be taken:
d) Take off the rcdoma of the radar bomb sight antenna.
,~,.'iJb) loosen the four screws holding the oval cover in the back part
of the azimuth -differentiating system and take off the cover.
c) Loosen 3li,;ht]y the throo screws holding tho pressing ring of
the R 1707 potentiowater of the optical bomb sight.
Turn the case of the R 1731 potontiometec until the display
of the signal from the cornor reflector is placed exactly on
the longitudinal marker; the transverse mESrker ahould divide
the display of the corner reflector signal oh the screen of
the plan position indicator CRT into two equal parts.
After this adjustment the indication on the calibrated gear-
drive of the azimuth differentia-tang system should be written
down with an aocurancy of,- 3,25? to facilitate future adjust-
ment after replacement of the optical bomb eight or its coupl-
ing unit without the necessity of application of the corner
reflector with the cdjustmont of the radar bomb sight.
??..wv-apu u1ntlCN ~
r, .
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 ~? {+ xo roreign inssem
-nil -
fck cover of the azimuth differentiating syatem.
?- 6? , the adjustment may be done-by mama of the course po-
i..ht; the correction should be done in the following ways
Remove the five bolts holding the cover of the course po-
tentiometer and remove. the cover.
Remove the four screws fastening the lid of the regulation
element of the course potentiometer to the cover and remove
tha lid. .
Loosen partly the four screws holding the rotating mechanism
of the courea.potentiometer.
deplacu the cover of the course potentiometer and tighten
it by means of two'ecrews..
(3) Adjust the control knob of the course potentiometer to ob-
tain thu coincidence of the disploy of the corner reflector
signal with the longitudinal marker on the PPI screen.
f) iternovo the cover of the course potentiometer, tighten the
ocruws and replace the cover and the lid.
Cut ofi t ha antenna rotr,tion system-.
Adjust the optical bomb eight to a position corresponding to
zero drift angle.
Press the "Loft-Right" push-button switch and adjust the sweep
trace on the plan position indic..tor to zero of tho azimuth
scale ( in coincidence with the longitudinal marker). The di -
roction of the maximum radiation of the radar bomb sight antenna
now coincides with the longitudinal axis of the aircraft.
Set the.swieth on the azimuth stabilization unit to position
"Solsyn zero". The sweep trace on the plan position indicator
screen must stay in the azimuth zero. should the sweep line
deflect after the switch it eat from "Jptical bomb aight" to
"Selwyn zero" position, the following measures must be takon:
a) loosen partly thu screw holding the adjustment sector of
the zero Boleyn (" Zero adjuat"runt"). -
b) Turn the sector of the zero selayn until the sweep line on
the DPI screen points to the zero of the azimuth scale.
o) Tighten the adjustment sector of the zero soloyn.
g'EC-R-E-T Il
No Foreign Dissem
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 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
No roreign uiesem
22
U
rn a yxp ecopo o can ro no n anti-clock-
en
e
wine direction to its extreme position. The "Expansion of the
center" control knob on the computing mechanism unit set appr.i-
Cut on the power-supply of the radar bomb eight as described in
? 1, Itoma 4 and 5.
Sot the "R.f. gain" control knob to its extromo right position,
and t th It
u
d w-'0" t l k b i
d
L, nt towards the radomo of the radar antenna.
Sat all controls of the radar bomb eight to their respective
initial positions ( See.Table 1.).
%It on the antenna rotation system and eheejc the posl5OX1-HUM
~e course marker of the radar bomb eight which should point
i the zero direction of the azimuth scale. If the course mar-
3r is shifted to the left or right aide of the zero azimuth
re cam of the miniature switch of the course marker, installed
n the base of the antenna gear-drive should be adjusted in
uch a way that the course. marker points in the direction of
hi zero on the azimuth scale.
:ut off the power-supply of the radar bomb eight.
Inapection of the performance of the airborne PSBN-M radar
bomb sight by means of the chocking ruson.:tor type 50 I.
he checking resonator servos for evaluation of the performance
he r,f. circuits of the r der bomb sight and for ?etsrmination
`hu operation frequency of the transmitter m?.,gnetron.
ha inspection is done in the following ordure
lnatall the checking reaon.,tor an its stand.
Jnaort the wavoguide twist joint between the waveguide input of
tho checking resonator and the horn antonrww fram the 501 equip-
m,;nt.
+Inatoll the checking resonator at a distance of approximately
44 to 5 m from the untonna of the radar bomb eight to the left
Jor right ai:e of the aircraft ( the radome of the radar antenna
control panel of the saotor scanning to position "Sector scanning"
and out on the antenna rotation system. The "Slow-last" switc1
on the timer and control unit set to position "Fast".
No Foreign Diesem
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 1h i
f1 No roreign uissem
1
fly means of the sector ev.itchee on the sector scanning panel'
the 6J?-sector scanning has to be adjusted so that the scanning:,,';
of the 5J1 checking resonator ( to be observed on the PPI
screen).
Cut on the high voltage of the transmitter.
Turn the" Attenuator" control knob on the 5J1 instrument in
c.nti-clockwise direction to its extreme position-and slowly
turn the "Tuning" control knob on the 501 instrument within
the limits of 9 to 12 and 25 to 28 great divisions on the
right soils of the wavolength-meter of the 531 resonator. The
checking resonator is to be tuned so long untill the pointer
of the microamperemeter on the panel of the 531 resonator
starts swinging from zero towards hiLher current indications
( this swinging of the pointer of the chocking resonator is
caused by the scanning of. the antenna).'
Switch off the antenna rotation system. oat the "Detector cur--
runt- power-supply check" switch to :the position " Detector
current"-. Turn the "Receiver' toning" control knob until the
detector current mater indicates a value corresponding to the
ia:xiaium amplitude of the raflacted signals ( sea. 9 2, Items
31 and 32). Set the "Manual-automatic" swtch on the timer
?'nd control unit panel to position "automatic"*
lc) Prose the "Left-Right" push button switch of the antenna ro-
tation control and turn tha antenna system to obtain the ma-
ximum deflection of the pointer of the mioro?mponneter on the
501 resonator. If at this m5ment the pulse of the chocking
resonator is preoentod on the monitoring and the plan position
indicator screen, the antenna should be turned till the me-
ximum width of the pulse of the checking reuonator is obtained.
13) slightly turn the "Tuning" control knob on the clocking re-
sonator.panel and tune the instrument to the frequency of the
transmitter magnetron ( maximum deflection of the pointer of
the 5J1 microamperometer).
14) By turning the direction handles of the' resonator stand ( left-
right Aid up-down), the maximum mioroaoporemetor indication
is to be obtaind.
S-E-C-R-E-T
}"I No Foreign.Diesem
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 I; I. a n v t. m.
50X1-HUM
Turn the "Receiver-tuning" control on the timer and control
unit panel to obtain the maximum width of the pulse of the
chocking resonator ( see Fig.2).
1'i;;?, Display of the chocking resonator pulse on the screens t
a) - The ai-Aito:ing CRT
b) - the plan position indicator CRT
i'urn tha antenna right and left, as well as up and down, and
repeat thi position adjustment and the tunin;, of the checking
renon.-tor. Also the receiver of the redor bomb eight has to be
tuned to obtain the maximum width of the checking resonator
pulse both on the monitoring CRT ( F1g.2a) and on the plan po-
3ition indicator CRT ( Fig...?b).
Turn the "Attenuator" control of the 5J1 reuonator in clockwi-
ao nirection till its a;:treiao position. A slight increase of
the width of the checking resonator pulse is obtained.
Turn the "Range" control knob on the panel of the computting
mechanism unit to bring the measurement pulse display to coin-
cide with the and of thu pulse the checking resonator (Fig.e).
Thu width of the checking resonator pulse ( ringing time)
should be 4 to 5 km. If the ringing time is considerably shor-
ter as compared with the above given, the tuning of the r.f.
circuits of the receiver is to be inspected ( See Chapter II,
9 3), as well as the magnitude of the average current of the
transmitter magnetron. If necessary, the respective circuit
should be adjusted. If no s.-tisfactory results are obtained
ba alignment of the r.f* circuits of the receiver, the receiver
aansitivity has to be inspected ( see Chapter IV, $26). Also
the average. power of the transmitter should he checked ;ad the
respective units should be adjusted and repaired.
lid S-E-C-R-E-T 1
{{~rJr No Foreign Dieeem R
JI
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 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
No Foreign Dissem
utter ( sea Fig.9), ibr their replacement the transmitter cover must
50X1-HUM
l )sad the indications of the scales of the checking resonator
right scale-integral numbers, left scale-fractions), The ma&.
letron frequency may be obtained from the charts witch on the
cover of the resonator or in its instruction book,
19) Out off the power-supply of the radar,
f""' tali II
. fiaca-aient of tubes, tuning and alignment of the R.F. circuits --of
the IICb H-N1 equipmente
r.plceaawnt of tubes, with the exception of the spacial r.f.
tutkJ types, is simple i r'id convenient and does not differ from the
rep c,~.nunt of tubes in current radio equipment.
Q. replacement of tubes which ne..d U be selected due to great
di 'xerunces in tae parameters of the respective tube types ( for
exa..^,plu th,: tubes in the intormudiuta frequency amplifier of the re-
oet4er nd some tubes in the range unit and the PPI) is to be per-
for4ed frain spuci l spcro parts reserve). Such tubes must be ropla -
cad by tubes, op.:cially selected in the i.:etory and marked with the
cr4 numburo as the tubes being replaced. If uuch special tubes are
float disposal, convenient tubes have to be selected. The tube is
o?r4id.:red a:, suitable if the circuit in which the replacement took
plaOe, fulfils the requirement of the technical conditions after be-
ir{itunud by mains of the respective controls. The alignment methods
I
aro'deacribed in Chapter IV 11 Instruction of the radar bomb eight
Pt ]-ti according to technical conditions."
. 'hu replncuwont of the ref. tubes ( the magnetron, ,.lystron, an-
te4a T-R tube) and the detector is different from some paints of
vi*, ?:nd after the replacement of any of those tubes a supplementa-
ry tuning of the r,f. circuits of the radar bomb eight equipment is
,tp a performed,
r_riltrcemet of special ref. tubes
i..? paei.1 r.f. tubes are installed in the lower part of the trans -
emoved. The replacement of the tubes iauet be done with disoon-
ud power-supply of the equipment ( this concerns especially the
atron tube).
j V
C
No Foreign Dissem
h 'i S-E-C??R-E-T
 I .:1
e v+ n n v. M
Declassified in Part - Sanitized Copy Approved for Release 2013/02/19 : CIA-RDP80T00246AO69900080001-8
aw S Fscapu L1COmu
lss
Gl
'~
~-.vt.WSan?ewL.1 ...r+~t .
50X1-HUM
O
1 - cover of the T-R tube, typo RR-6 ( L 1108)
2 - hi;. net, type MP-11JI'"` -
3- exhouet-fan mouth
4 - Magnotron, type MI-53 ( L 1107),5 - Magnetron
halding ucrew, 6 - acrew lulding the magnetron joint,
7 - klyatron shield, 8 - adjusting screw of the ma-
chunice1 tuning of the klyatran tube, 9 -~ klyotron tube
type K 19 (L 1110) 1J - cover of the clyetron shield,
11 - detector holder, 12 - key for tuning of the kly-
etran tube, 33 - key for alignment of the T-R tube,
1,4 - locking screw o f. the detector holder, 15 - ad-
jueting screw of the RR 11 T-R tube, 16 - looking
screw of the RR-11 T-R tube, 17 - 1-R tub31 type RR-11
( L 1109), 18 - lid of the trigger elevtrode of the
T-B tuba, 19 - fitting of the P'l1J1 switch, 20 - re-
slat or, type P 1118.
S-E-C-R-E-T
No Foreign Dieeem1t
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 L
i+ o t at No steel or iron objects may bo placed in the vicinity
of the HP-11J1 ++:,gnet ( pliers, ;crew-lirivorf, keys etc)
E 4; as this would de-magnetize the magnet.
itemove the six screws (5) looking the magnetron flange (4) and
rsmova carefully the magnetron tube.
6:r'd
The magnetron replacement is done in cases of poor performance
of this tube. Faulty function of the m..gnetrdti is indicated by the
Following effectst
Q) After the transmitter is cut on the "Magnetron current" meter
Vindication is zero, and the rectifier current has a small value.
I ;.O) T;;stability or sharp increase of the magnetron current.
,,:a,netron " Sparking" indicted b the vibration of the
Y pointer
An tae ecule of the "Mabnatron current" ~.ietar; after tine ,cgnutron
ureorst is decreased the "Sari "
~ P nI5 ;,oes on.
Ducr?a:.se of the aver...,;e power of the trLnsmitter with normal
t 4alue of the m:,gnotron current,
II o t e: The ,Abav+, deecriebed effects need not be caused exclusi.-
ly by in.dequate performance of the magnetron; they could also
,pppear us results of faulty in some transmitter circuits. Thus for
+t l bx .:uple the absence of the magnetron current with a small recti-
4 ,'ier current ( of the order of 1 to 5 ma) may be c..uaed by a fai' -
` 'era in the magnetron heatin, tnnuformer. A sharp increase of the
"Magnetron current may be e,used by failure. of the S 1118 eonden-
C-,ser or the QMI-83 tubes. The reason of the dacroase in average
tr-nu,nitter power may be found in the de-magnetization of the meg-
.tron permanent magnet, etc.
The magnetron tube is replaced in the following wuys
:'Y) rtemovo the exh..uet-fan mouth ( Item 3 in loosen two
screws holding the locking; yoke of the fun motor.
?,2) Remove the four screws uoldint; the magnet (2), and remove the
;,signet.
!`.':3) By means of a special steel plug remove the upper two screws
(6) and loosen the lower two screws holding the waveguide out -
Put flange of the magnetron; disconnect thc-, m::gnetron from ito
wavoguide.
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 Install carefully a new magnetron tube and be sure, that the ba-
sa heating pins of the magnatxvn touch reliably tha contacts of
the r.,ceptucle.
tuotc;n thu magnetron and its waveguide flange. Replace the-wag..
net and the exhaust fan nuuth. Tighten the screws holding the
.ports mentioned.
After the replacement of the magnetron the current of the mag-
u;tron should be chocked, and also the performance of the trans-
?mittur unit should be inspected ( see 5 2 of this chapter).
`iy n,;.ns of the checking resonator tune the r.fo circuits of the
a radar receiver f a, ..r _. .
olarun_ent of the klvatroll . tvoe K19 ( L 1110 ?
rault;/ function of the fl
st
g
ron tube is inlic..ted by t''"ng Ofiucts: cinsiderable decreaua of the noise in the monitoring
C" be di.aplay and inulic:tion of zero current oil the scale of the
r, ot,;ctor current" m,;tro in all praitions of the "Receiver tuning"
ntrol knob, .notice uhould b
a t.Acen ui the f;.ct that the faulty
'3nction of the detector is indicated by effects similar to those
( le No : If the upwards tilt angle of the antenna is more than
50 :t p4 the downwards tilt angle is leas than 2J? with the sum of
th& nRles exceeding 25? , the lengtt of the pull rod has to be de-
No Foreign Diesem
f.
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 } tf
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76 -.
50X1-HUM
etio a d ud ustm t of the a ritanna tilt indicator.
t, with the protractor attached to the anten
a
n
segment the
,, it angle of. the cntenna ( sou ?16 0 i
tem 1)
,
.
,Jointer of the antenna tilt indicator on the timer and eon-
l.( 1-lit panel should indicate an angle of o ! 20. If the
'.', er position is outside the above limits, it should be ad
-
$ by moans of the.potontiomoter controlling the antenna
{ Unit 110-19). This is done in the following ways
Pon the 3`x-19-35 connector, loosen two bolts and remove the
Ivor of the antr,nna tilt potentiometer, Than connect the
R
bt
ovu connecor to the antenna tilt potentiometer.
+ut off the power-supply of the radar bomb sight equipment
ctrl slightly loosen ( approximately by 1800 ) the screw, lack-
the position of the slide of tho antenna tilt potontiome-
er.
urn the axle of the tilt potentiometer by an angle approxima-
uly three times as groat as the angle road from the tilt pq-
'-4r`ontiomotor. Turn it in the direction corrooponding to that
n which thu pointer of the' indicator 13 daflactin4 from the
Thu pointer of the tilt indicator India,tee an angle of
th instead of the zero angle. Under such conditions the alidu
potentiometer should be turned by approximately 12? in elook-
i ruction.
dress with the index finger of the left hand the goer instal-
led on the axle of the tilt potentiometer, and with the left
?hand thumb6roes thu slider of the tilt potentiometer, and
1
tighten with the right hand the screw locking the tilt poten-
tiometor In its correct position*
jCut on the power supply of the radar bomb sight and check the
position of thopointor on the antunns tilt indicator. If the
pointer indiautes an angle different from sore, repeat the ad-
justment as explained above ( Items b, at dg
.).
Replace the cover of the antenna tilt poteni . bmuter.
t antenna downwards by an angle of 20? ,=,0 ( by moans of
Protractor). The antenna tilt 'indicator should indicate an
of 20 -- 2?
g-E-c-R-E-T ... - w
-
L 1 No Foretan ninnam .Stn Declassified in Part - Sanitized Copy Approved for Release 2013/02/19 : CIA-RDP80T00246AO69900080001-8
 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
50X1-HUM
ct the accurancy of indication of the antenna tilt indica-
of 50 in the upward, and downward direction, and in each
formuloen
it .wa Aa. ?J YV.... V..V ...a.w V.V a. V4 w.p ,/.V v. VV W. W ~../
g~na tilt indicator.
'",error of the antenna tilt position is checked from the fblr
;j No Foreign Diesem
( measurement of the down-
wards tilt angle).
( measurement of the up-
wards tilt angle)
degrees)
= the angle road from the protractor with the ini-
tial position of the antenna of 0? ( in degrees).
= the angle of. the antenna tilt with reference to
tllo horizontal plane, measured with the protractor
( in degrees).
the angle of the antenna tilt, measured with the
antenna-tilt indicator installed on the timer and
control unit ( in degrees)*
error in the indication of the antenna tilt angle,-as indi-
ad by the indicator, should not exceed' ; 20 in all points
pected.
anno from one extreme position to the other.
" des the "Up-Down" switch and start the atop-watch at the same
o"a
Ana.
'TS _ _ .. ._. _._ ai_ a. ~.. .... w.... n.w. Inn mnvnmnnt n4 .6n
as the "Up-Down" switch and install the antenna to.tho upper
reme position., and then to the down ( lower) extreme position.
section of the rate of change of the antenna tilt ankle..
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 50X1-HUM
4) 0. atu the rate of change of the antenna tilt znglo'from the
ft ,ling formula;
Where = rote of change of the antenna tilt
= the angle, measured with the protector and correspond-
ing to the extrema lower position of the antenna.
= the angle, measured with the protractor and corres-
ponding to the extreme upper position of the antenna
t = the time, measured with the stop-watch, corresponding
to the movement of the antenna from its one extreme
position to the other.
The rt,te of change of the antenna tilt angle (?'') should be at
least 4 degrees / sue., but'not over 6 degrees/sec.
E. Inspection of the operation of the antenna tilt mechanism on
the aircraft.
On th?3 aircraft, the following characteristics may be measured;
1) The limits of the antenna tilt angle, ttiy measuring the extreme
position angles with a protractor. The difference angle between
the two extreme'positions of the antenna defines the limits of
the change of the antenna tilt which should be 25? at least.
The protractor should be installed on the cover of the antenna
-segment*
2) The rate of change of the
( 1169 D.).
3) The performance of the antenna tilt indicator. This is measured
in the following way;
a) 'Press the "Up-Down" switch and bet the antenna to its extre-
a,aatively 30 Mc/6 and chock
Irma the deflection of the painter, the passing of the o ipnal
through "?e receiver.
9) Switch off the powc:' supply If the signal gunur..t3r and use the
"R.f.t an" control on the trier and control unit to adjust the
receiver noise voltage to J.3V ( use the 3V scale of the VK-2).
10) Switch in the power
is alwrye in this position, according to the circular dial of
the aigncl 6,emmtar, uc iced "Jutput", r..djust an output voltage
If 100 :dicrov3lts.
6) Switch in the pJworsaupply of the VK-2 and sot the viltago-ran_
go switch to position 3 V. Use th,: "Zero adjusts nt" central knob
to bring thu pointer If the meter to zero reference of the scale,
7) Svitch in the power-supply If the rc.dar bo:3b eight. Sot the "R.f..
gain" control knob to its di
13) Alcaeure the frequency response curve of the interuediato froquon-
?y `nPlifior of the rcdar bomb eight receiver. Tune the signal
80nemt3r successively to the following fruquonciosr 27, 28, 29,
29,5, 3J, 33,5, 31, 32, 33 and 34 MC/a, and at each frequency
Orlte.dowa the voltage indic::tud by the VK-2 voltuoter.
14) Fnu therosults if this measurement draw the respective frequan-
?y r-uponso Curve of the intoroedicto frequency amplifier accord-
ing to Fig.32,
15) Calculcto the .pass band of the intorwodinto frequency amplifiu.?
( ''np) as the difference between the two frequencies (f and f)
found on the frequency response curve at the level of 0.7 of the
P6ak Value of the curve ( sea Fig.32).
Th3 Jnaa-hnnd must be at least 3.8 Me/s.
~---B-E-C-R-E-T
No Foreign Diseem
 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
I I . MA
FY 21 Frequency response curve of the inturwodiato frequency
waplitjor of the rcdcr bomb sight ?rocoivar.
N o t a sIn the courso.of the ,.osurumont, constant vrluo of the
supply valtcga ( 115 V) ;Aunt be Lointainod and also the voltage
of the artier frequency produced by ti:, uignol gonarator must
be kept'eonstant ( 1JJth scale-division of the motor).
lb) Or..lculato thu int,r.audi.:;to fruqu.;ngy of the receiver froze
th,, o.;uotion
np
fl + F2
T MV/s)
fl and f2 = thu frequencies eorroepocding to the 0,7 va-
lue SY'the peck v,ltcgo ( in I4Wa).
Thu intormodiata frequency should be 30= MW/s.
17) S,itch off the power supply of all the equipment and diseon.
nest both instruments Tram the radar bomb eight. Replace the
detector holder with the detector and adjust the detector
current value by means of the :,r,tar installed on the panel
of the timer and contr3l unit. Chock the o,oeration af.tho
receiver ty ;wens of the checking resonator. 50 I and, if
nueessary., tunu the receiver as described in Chapter n ,L3.
$E-CR-E-1'
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 I!?1~ y-E-C-R-E-T
50X1-HUM
29. Inupactian of thu pack valturce of the pulse at v
hiieh the
firing of the trane:aitter occurs Inupection of
tt{~die-
charge v)ltzge of the transuitter with th` pulse
ro-
tor typo 26 I.
Disc)nnoet the "44" cabin fr)n the Sir-ll-44 receptacle on the
tn:nsmitter unit and c)nnuct it t) the "External synchrlniaation"
rocuptcelo of tho 26 I. Use the ci.:xtal eablu far canhocting the
"Output" rocoptaclu an the 26 I, :..Irked " with the Jx'-11-44
racuptaole an the trans:aittur.
Gannet the "Oraund" roceptacle an the 26 I with the chassis of
tha troniaitter unit. The arrangeuent is shaven in Fig.33,
p1_e. 33x - rronso:wont al the c)nnoctian Jf tha pulse generator
26 I with the tran:aittor of tha r: der ba:ab eight:
1 - Baer and control unit of the rcdar baub eight
2 - coaxial cable from the Sr-1-44 receptacle an the
No Foreign Diesem
tiuur and cantr)l. unit t the "External synchro-
niwtian" receptacle of the pulse ,erwrutor
pulse generator
coaxial cable from the "Output .s " receptacle of
the pulse gunsrat)r to the br-1-44 receptacle
5 - transmitter of thu radar ba8ib sight
6 - conductor from the chaesie of the radar bomb eight,
to the "Or)und" receptacle on the pulse generator
it4 S-E-C-R-E-T
Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246A069900080001-8
 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
I }11 iwu rur-elgii ui""eui
-338
50X1-HUM
p) Sot the switches on the pulse gonorctdr a6 I to the follovdng
positions:
" Pulse longht" to position t 1 micmeeo"
" Delay" to position " 1 microsec."
" Pulse: External-Oonerv tor" to position "Ounerstora
" Range" to position " x 10"
" Recurrence frequency " t) position "External control"
" Calibr..tar" to position "Off"
" Jutput switch" to position "SL"
Sweep" to position "Fast"
Mine" ti position "Off"'
" anode" to position "Off"
" Dolay'lino" to p)aition'"On"
External synchronization" to position
Adjust the "Swoop amplitude" control to its medium position,
turn the "Pulse amplitude" control knob in clockwise diraotion
ti its extreme position.
3) Set the switches of the timer and control unit of the padar.bomb
eeight to the following position:
" Tube switch" to position "2"
" Cali brat ian'maAcing" to position "Off"
" Manual- Automatic" to position "14anual"
" Antenna control: On-Jff" t:) position "Off"
" Detector current- Power supply chock" to position "Power sup=
pia check"
"Range delay x 10 km" to position- "0"
"Rarsgu in km" to position " 10/60"
"Maine 27V-115" to position "Off"
"Transmitter heating" to position "Off"
4) Switch in the power supply of the radar bomb sight and sot the
"Maine 27V-115V" and the "Transmitter heating" av.itehea to po-
sitian
5) Set the "Mains" a itch an the pulse gdnoratar to position "On",
6) Des the "ilrlgthnoes" and "Faous" controls of the pulse gunorator
for odjustmwnt of the convenient brightness and eh.rp focus of
tho display on thu screen of the pulse generator tube.
L
S-E-C-R-E-T
No Foreign?Dissem
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 S-E-C-R-E-T
50X1-HUM
7) FYvu winutes :ftor the ewitchini in if the "Trcu?mittor haatint ,
switch an the tiger and central unit owitch in the high valtago'
if thu transruittor.
Inspect the porfana:nCe if the tranaraittur Pram the iodic tian
if the "Iaatnotran current" motor and the wanitaring tube. The
value if thu wr.gnetran current in the 13-6a ran so shiuld bu 7
ti 8 me, in the "1JJ" ar "8JJ" rcnges la ma,, and in the "Boaooa"
apotr:tian 9 - 32 ma. The display of the wadulatar pulse in the
screen of the wanitaring tube if the radar bomb eight should
rut be oaverod by the swoop base trace, and it ahtuld not be
drublod ( euu iig.34 0)1
Fig. 4t - Display if the wadu3 ter pulse in the ecrcbn?7i thr
ainitaring tuba of thu radar bomb sights
a - with standard aperatian:l caniitians
b - with irrsu-ular wadulatar pulse
9) Measure the peak value of the transmitter trigger pulse voltage
by this mothads
s) turn the "Vertical displnoument" control knob of the pulse
generator to obtain the coincidence of the base. of the pules
so ( vis, the swoop base tress) with the thick line on the
8) Dueruase the valtago if the transmittor trigger pulse by turn-
ipa the "pulse cmplitudo" cantrol knob of the pulse gatwxrtor
in :Mti-clockwise direction until the display if the Wtdulator
,rulse on the screen if the ~ainit3rinG tube is croseod by the
eweup base trace ( eau fg.34 13) Thu ": ulso :.mplitudo" cantrol
knob should not teuchod aftorw-rds. In this situation switch
off the high valt-:go if the transmitter and out off and an the
"Trc)nemitter heating" switch.
S-E-C-R-E-T
No Foreign_Diesem PIT ~~-
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 -- I'iI :.S-E-C-R-E-T
C
140 -
50X1-HUM
screen if the pulse ~nor.Aar tube. Nita the indic--tian of
the valtaeter an the front panel at the g.;neretor.
b) turn the "Vorticel liuplacemont" control knob to ibtnin the
ciincidanee if the pulse peak with the line ti which the
sweep base trace was previsualy displaced, and nito the in-
dic..:tiin of the viltmeter of the pulse gonoratar.
c) Woasure the peak velue it the transmitter tri;;;er pulse ex-
pressed tbr the difference between the vsltmator indications
with the measurements describes`under "a" cal "b", ruspeeti-
vely, the pe.:k ohiuld exceed 90 V.
10) Inspect the peak vilt;;ge if the trasn.?aitter triL;;,or pt.lsa in
"Scanning" aperotian with the "Rcnje" ewith in ;.isitian "100"
and in the "Boaca:-i" iperation.
11) Turn the "Pulse amplitude" central knib in clickvdeo :iirectian
t) its extrei,u position and oat the "Boacin..ScanninL" a4tch
ti p.s itian "Scanning,". Set the "Runge" aiitch to pisitian "100".
Switch in the high ciltr.go if tho tranaAtte:.
12) Inspect the disehnre vsltago if the transmitter with unnunted
cover and nirs?al atuiapharic pressure ( no c)mprossud air in-
side the transmitter cavor).
or this insliectian the "anado" switch of thu pulse gener.:ta
ohiuld be set to ;siaition "Off" and aftur 60 seconds again is
"On". The transmitter ohiuld ipor,te reliably, the indications
sf the metcr in bath the "Ma;netran currant" and "Rectifier cur
rant" piuitiona of the respective switch ohiuld be within the
hilts if the respective Technical Regulations.
13) Switch off the supply of the transmitter and the pulse gonoretar.
0 3U. Inspection of the vertical and harizintal r.:diastion tattorns
of the ,attune
Th,, inspection if the antenna n:diatian patterns in bath the ha-
rizantal and vertiacal planes ahiul.d be done with the equipr-,ont in-
stalled in a rotojle stand, where th,: entonna can bo'tilted withiut
the necessity if the lisman'tling of the trmwi ittor-antenna assembly.
Thus the trunsaittor mpgmutnn is used as the r.f. energy source
With the rwoourcuaent of the rcdi,ation patterns. The r.f. power re-
41Jted by the antenna is measured with the power autput uutor of the
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 II
i_.
50X1-HUM
watt and wavoli:ngth-muter, typo 34 IM, or,. if this instru aent
is nit by hand, the signal generator, typo 31 IM.. However it a
uh,uld be said here that the measurement accuracy of the 31 IM
instrument is inferior to that if the 34 IM type, as, the indi.
cition if tha power output rueter of the 31 IM conuidurably ouf-
fars from the variations if the power supply voltage as well us
the supplementary heating of the th,ir.4utar,, caused by the tem-
pen-ture ch:;nJe inside the cover duo ti the heating of the com-
ponents of the instrument. Thus, to abtain satisfactory results
with the measurement by means of the 31 IM ,Aetor, the initial
balance of the thermistor bridge ( zero adjustment) should- be
inspected pariidically after each 2 - 3 minutes of the paration
if the after. The instrument should be in operntion at least 30
ainutes before the beginning of the measurement.
In addition to the above mentioned instruments, also the field-
atren;;ht indicator type 38 I with the 281 amplifier may be used,
a. Inspection of the radiation uattern of the ruder bomb eight
antenna with the signal generator, type. 31 IM, or the watt-
3 meters tram the straight line. intercepting the both antennas
should be free. Thu distance from the antenna to the ceiling
should be at least 2 mete re l'ha arranaemont of the antonnar
is shown in Dig.35,
antenna from the 31 IM or 34 IM accessories. The antenna should
be placed in the plane of rotation of the radr:r bomb eight an-
tenna. This installation is done by means of a cord and two
Warkero an the base of the rotatable stand on which the tranr-
uitter and antenna assembly of the radar bomb eight equipment
ie installed. The horn antenna ahould be installed in such 6
way that its broad aide is in the vertical plane. No obstacles
should occur between.the radar bomb eight antenna and the
ham antenna, and "lso'the space within the limits of the least
2) at a distance of 8 - 10 m install, on another stand, the horn
for the measurewent of the radiation patterns of the antenna.
1) Install on the rotatable stand the special scales and painter ~ 'I
14 S-E-C-R-E-T
No Foreign Dissem
and wavelunrdrt-mater, type ,34 IL.
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 t'
hi
3) Uos the waveguids- ta-coaxial Junction far oonnocting the horn
antenna with the reupuctivu inatru;::ont; 31 IM or 34 IM,
4) ?dJuet the signal genorotor 31 IM in this ways
a) set the evitehes an the signal &enarntar to their following
ps itionsl "0,5 Wit-1mW t3 position "laW"
"0onurntar" to position "off
"Typo of aperation" ti?.osition "C)ntinuaua 1"
"tooter'' to position "StL.bilizotion"
"Maine );itch" to ,)1aittin "Off"
4 - Stand of tho tr~nemittor ant antenna assembly
5 - transmitter of tilu radar bomb eight unit
6 - antenna of the radar bomb u1Cht unit
7 - pointer
8 - scale
9 - pointer
10- scale
f
o t1'. r.,tar bomb ai,t untunna
1 - horn antenna of the 31 IM or 34 IM
2 - weveguide to coaxial Junction
3 - instrument We 31,IM or 34 IM
Fizz. 35s - .irrangemunt of thu a,pparutus ( 31 IM, 34 IM or 38 DI
types) in the mooaurac_ent of the r.diation pattern
r 'I S-E-C-A-E-T 1'~
It No Foreign Diseem F
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 50X1-HUM
Turn the attenuator control knobs in the clockwise direction
to their extreme positions.
b) Connect the power supply cable to a 223 V 50 copes. ar 115 V
430 copes mains, an(' act the wins evitch to position "On".
o) Use the "L4easurement" switch to bring the pointer of the
power output meter close to zero reference and lot the in-
stru:aont operate for 3J winutes,
d) after the instrument is heated calibr to the power-output me-
ter, as described in ? 24 A, Item 4.
In the course of tha measurement inspect the zero adjuotwent
of t e pointer of the power output meter each 2 - 3 minutes.
If the watt-and wavelonght-motor type 34 DIG is used for moa-
sureuent, it should be adjusted in this ways
a) Set the operation type switch to position "On", and the "0,5mW
- 1.0 mW" evitch to ,oosition "lmW". Turn the control knob of
the attenuator in clockwise direction to its extreme position.
b) Set the "Power-supply" switch to position "Internal", if the
instrument is supplied zrom the inside battery, and to "Esa-
ternal", if the instrument is energized from an external D.C.
d) Set the operation type evitch to position " By-steps measure-
io not so, turn the axle of the "Lridga supply stabilization)
potentiometer accessible from the front panel of the instru-
ment, to bring the pointer of the power output meter to the
2.0 mW reference.
power source of 24 V ( accuuulator battery).
c) Set the operation type switch to position " Supply stabili
z.:tion". In this position the pnintor of the power output
meter should deflect to the 2.0 mW referenco mark. If this
mint" and turn the "Mooeureciont" switch to bring tha pointer
of the power output meter to a position as olose to the zero
of the scale as possible. Note the position of the "Meosure-
mont" switch. ..
Set the operation type evitch to p'siticn "Exact moasure,ient"
and use the "Zara adjustment" control to bring the pointer
of the power output motor exactly to the. zero reference of
the scale.
`, fi11 No Foreign Diesem Tf
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 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
) w ,k ,1 No Foreign Diseem
? 144 -
{) Set the "Meaeuremet" switch to Position higher than-the by "&u ucep
position in which the zero, was'cdjuatod? The pairs.
ter of the motur ehiulrl deflect to the 1 mW reference mart,
If this is not so, turn the "Sensitivity" control knob to
adjust the printer to the 1 mW reference. Then not the "Moa-
surement" switch to a position lower by one. stop and inspect
the adjustuent of the pointer on the, zero reference. If .-
r- eition 1 A if necessa - a w'?
ry, ropuat the adjustment. Thu adjust.
gent should b
e repeated until th
e pointer of the power out-
put mater is deflected exactly to the respective references
of ') and lmW on the scale with the avitching of the "Meesu.
rumont" control.
5) Sot the "Maine 27 V-115 V" and "Transmitter hu?uting" witches
on. thu timer and control unit to noiti3n "Jn". The "lingo in
km" switch should bo oat ti ;usition "1JJ". Press the "Up-Down"
switch controlling the antenna position and adjust the zero an-
tonne tilt ancle from the scale of the antenna tilt indicator
on the front panel of the timer and control unite after 4-5 mi-
nutes cut on the high voltage of the transmitter.
6) Turn the control knobs of the attenuatorm in anti-clockwise di-
rection to their extreme position. ( i.e. the rainimu:r attenua-
zontal plane until a maximum is indicated by the power output
meter. With the progresuive increasing of the indication of th
Power output voter, adjust the control knob of the _ttanuator
in the clockwise directirn eo that the scale indication can be
convaniently read.
7)
Turn the antenna of the radar bomb oigtit in the vertical plane
until the power output meter indicates a maxL.wm. In this posi-
tion the maximum of the antenna r.diotion is directed towards
the hrrn antenna.
6) +Moasure the distance from.tho floor to the medium part of the
reflector of the radar bomb sight antenna, and install the horn
ontunna 9f the 31 L" jr 34 IN instrument at the Dame height (the
height should be measured from the floor to the center of the
Wavoguide output of the horn antenna) . Then slightly turn the
horn antenna up and down and left and rijht to obtain a maximum
indication of the power output meter,
S-E-C-fl-E-T
1 - _ I Nn Fnra4nn
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 n n r m
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? ') -- ire rUieiali ulnneIV
1) Loosen partly the screws fixing the angular scale of the antenna
mum value).
Inatcll a protractor on the upper surface of the segment of the
radar bomb soight antenna and measure the tilt angle of the sec,
went in reference to the horizontal plane; the angle should be
about 7 - 8 degrees. This angle gives the tilt angle of tlm an-
tenna e'gmant in reference to the radiation maximum of the an-
tenna, i.e. in the horizontal plane in this case. This angle
wuat be measured to enable the adjustment Of the antenna tilt
indicator ( see also. 16 A. Item 2).
the position of radiation watimum Of the rrlar bomb eight anten+
no in the vertical as well us horizontal directions. This ma-
ximum should aim towards the horn antenna ( if the radiation ma-
ximum of the radar bomb eight ant,)nno coincides with the direction
of the horn ..ntenna, the power output motor indicates the maxi -
50X1-HUM
9) Turn slightly the antenna if the r::dar bomb sight and correct
rotation in the azimuth plane and adjust the scale so that the
visor of the pointer coincides with the zero reference mark on
the scale. Then tighten the scale. - -
) loosen partly the screw fixing the painter of the antenna tilt
the zero reference marker of the respective scale. Than tighteA'
the pointer.
4) Turn the control knobs Of the attonuators until the indication
on the power Output meter is exactly 2 mW. The attenuation, in-
traduced by both attonuators, should be 5-13 db under! such cir-
Culastances ( with an atton??ti)n of 7-9 db obtained in the wave
Guide-tocoaxial junctinn).
Turn the control knobs of the attenuatire in clockwise direction
to their extreme position ( i.e. maximum attenuation). The pain-
ter of the power output meter should return to the zero referen-
ce of the scale. If this is not so, use the "Zero adjustment"
control an the front panel of the 31 IM or 34 IN to adjust the
painter to zero. With further measurement the zero adjustment
inspection bhauld be repeated periodically after each 2- 3 minor
.too of operation of the 31 IM and ,fter each 5-7 minutes of the
34 IM instrument.
S-E-C-R-E-T
No Foreign Dieeem
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 J!, I
50X1-HUM
15) Meosuro.the vertical radiation pattern of the antenna; turn
the rotatable part of the stand with the installed antenna so
that the segment part of the antenna is tilted forwards and
down; this movement corresponds to the "Upwards" tilt of the
airborne untenna. Tilt thu antenna in steps of 295 degrees up
to 50 degrees on the scale of the antenna tilt. In each poci.
teen write down the indication of the power output meter. Than
return the rotatable part at the stand to zero tilt position ,
and measure the back-wards-down tilt corresponding to the mesi+
sureme.nt of the downwards tilt of an airborne antennae Tilt the
antenna in steps of 2.5 degrees up to 23 degrees of the scale?
In each position write diwn the indication of the power out-
put voter.
16) Frou the results of this measurement draw on a chart paper the
vertical radiation pattern of the antenna. The maximum indicap
tion of the power output rector is considered as 103%. Thus it
the maximum indica'tion was 2mW, thu values measured should be
multiplied by 50 in the drawing of the radiation pattern. In
this drawing the measured-power is plated on the vertical axe
in % ( 1% - lmm), while the horizontal axis indicates the
glee of the antenna tilt (.Ina is 005 degrees).
17) The vertical radiation pattern of the antenna should b
e Coves
with a transparent paper on which the standard radiation pair
tarn ( o copy of the pattern presented in Fig.36) is drain, The
axes of both charts should coincide.
S-E-C-R-E-T
No Foreign_Diesem `~7-- T-
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 R-F.-(:-R-F.-T
L
The Waasured n:diation pottorp should fall inside the uurfaoe
batweon the "a" and "b" curves of the atana-,rd pattern from Fia.360
The irrejSularitios,,of the radiation pattern uhauld be chocked by
displacing the standard pattern upwanls so that the lowar.limit of
the pattern measured coioidos with the curv.j "b" .3n the standard
pattern. Thi upper limit of the curve in the ueasurud pattern should
rat surpass the limits of the."b" curve ( Boo Fig.97)s
the radar bomb si,;ht antenna.
50X1-HUM
D a.16, - Curves of the standard vertical radiation pattern of
ligg 371 - Inspection of thu irrajul,.ritiea of the :auaaurud vurti-
cal radiation pattern of trio antenna of the radcr boau
eight. The thick line inlicatoa the measured pattern,
while the thin lines are the limit of the standard
pattern.
18) s.djust the antenna of do n dar bomb si(ht by turning the ro-
tatable part of the stand to the zero angle A tare antenna tilt*
loosen the gears of the azimuth difforentiatins uochanism and
the oleotro-mechanism MPR-2 frrm the coupling on the vain gear
of the antenna rotation system.
19) Check the direction of the radiation maximum of the antenna in
horizontal plane ( the maximum should aim towards the horn an-
tenna, and the power output waster aluuld indicate a maximum in
this position). Check the zero adjustaent of?the power output
motor.
S-E-C-R-E-T
No Foreign Dissem k'
 e i n n c+ m.
0
- 148 -
50X1-HUM
Turn the control knobs of the attenuators of the 31 IM or 34174
to bring the painter of the power output meter to the 2 mW ro.
feronca on its scoloi
Measure the horizontal radiation pattern of the untunna by turn-
ing the antenna in the horizontal plane to the left and right
in steps of J,5 degrees up to 8 degrees from the zero angle on
the azimuth scale, and in each position write down the indica-
tion of the power output. mater.
Draw the curve of the horizontal radiation of the antenna. The
standc:i1 curve of the radiation pattern is oresuntod in Fig.38.
Figs 8s -Standard curve. of the horizontal r.!diution pattern of
the antenna of the radar bomb sight.
The curvy of the radiation pattern, obtninod.with the ,.ioosuro-
Wvnt, should not exceed the limits of the stcndard pattern curve.
The width of the curve at the power level of J,5 of `he mnxinum
value ( half-power points) ehiuld net exceed 3.2?.
23) lueasura the horizontal radiation pattern of the antenna with
on angle of antenna tilt of 45 degrees.
24) Switch off the power supply of thu ruder bomb sight and of the
inspection instrument. Ruatoru,the coupling of the gears of
the azimuth differentiating ,aooh.:niam and the eloctrowochc:niem
with the main gear of thu antenna assembly,
1,,,,, No Foreign Diesem
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 D. Inspection of the antenna radiation Pattern of the radar Hbomb
eight by means of the field etrenath motor, ttype 38 I.
The cothod of the meosurement of the radiation pattern of the
z:ntonna by means of the field etronght meter does not substantially
differ from that described above. In this measurement the 28 I
amplifier should be connected to the 38 I field strength motor, to
be used as the indicating instrument. The measurement method is
this;
1) 4.djust he acalos and pointers on the rotatable stand as descri-
bed in 5 30 1., Item 1.
2) Install the field strength peter as shown in Fig.35, and connect
the detector holder of the field strength motor by moans of a
coaxial cable from the 38 I accessary oquipmont,with the "Input"
rucoptaclo of the amplifier.
3) Set the switches of the amplifier to the following positionst
"Mains" to position "Off"
"Voltmeter" to position "Off"
"Crystal-Bolomotur" to pz)si,tion "Crystal"
Input voltage" ti position "x 10"
Froquuncy range" to position "400-1,000"
attenuation" to position "'ltl"
4) Turn the "Gain" central knob in clockwise direction to its ox\a
trea;o position. The "Cantinuous tuning" control knob should be
sot to its medium position. Tha control knob of the attenuator
on the field strength motor should be set to the 30 db refa-
ronco.
Connect the power-supply cable of to voltage stabilizer of
the amplifier to a 220 V 50 c.p.e. mains and connect the volta-
ge stabilizer to the amplifier.
5) Switch in the power supply of the amplifier by setting the "Mai m
switch to position "On". i.ftor 1-2 minutes adjust the "Zero ad-
Justment" control to bring'tho painter of the valtmetor to zero
reference. Sot the "Volta.oter" control knob of the Qmplifior to
position "On".
6) Turn DO the power-supply of the radar bomb eight aryl after 5 mi.
nutes switch in the high voltage. of the transmitter.
S-E-C-R-E-T I,.,
i No Foreign Diesem
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 l R_r_!`_R_r_T
- 150 -
7)'Find the radiation maximum of the .:ntonna of the radar bomb
sight as described in ? 30 e, Items 6 and 7. Read the indication
on the scale of the amplifier voltmeter. If no voltage is in-
dic;:ted, inspect the performance of the detector in'the field
strength meter, and if the detucor is found, correct, tune the -
detector by turning the adjustment screw installed in the back
Part of the detector cell of the field strength water, The tun-
ing should be done according, to the maximum indication of the
voltmeter of the amplifier. If, in the course of the measurement,
the m.:"imum of the radiation pattern aims to the horn antenna
of the field strength indicator, the attenuation of the field
strength meter should not be ddcreasod under 25 db, as the de-
tector would be endangered.-
8) Measure the distc.nce from the floor to the medium part of the
reflector of the radar bomb sight antenna, and install the horn
antenna of the field strength meter at the some huirht.
9) Correct the direction. of the radiation maximum of the radar
bomb sight antenna as well as the direction of the horn antenna
of the field strength motor to obtain the maxiinum indication of
the meter. If in the curse of measurement the pointer of the
amplifier voltmeter deflects over the ends of the scale, inerQa-
se the attenuation of the attenuator in the field strength meter,.
or turn the "Gain" control knob of the amplifier in anticlock-
wise direction to bring the pointer back to the center part of
the scale.
10) After the oAact maximum of the radiation is adjusted, sat the
control knob of the attenuator of the field strength autur to
the 32, 34 and 36 db references. Use the "Gain" control of the
amplifier to bring the pointer of the voltmeter aerie to the
50th scale-division.
11). Measure the rudiation pattern, as shown in ? 30 Al Items 10, 11,
12, 15, 18, 19, 21 and 23.
The roadin&should be done from. the.scale of the attenuator of
the field strength uutor by varying the attenuation in each posi-
tion so that the pointer of the amplifier voltmeter is always an
the 50th scale division.
Subtract from the inlieotiono at the attenuator, eorrospondirz
to the radiation maximum directed towards the horn antenna of the
No Foreign.Diseem
A.~. n...,, .._ _ ...S_E-C-R-E-T
 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246A069900080001-8
,I via roreign uiaeem
50X1-HUM
field strength motor,. the values of the attenuation with various
bearings of the antenna.
;sy means if Table 7 convort the difference obtained from d,,ci- 4
bola to percent. .
Docixl fractions of
libels;
0
0,2
0,4
0,6
0,8
Integral decibel
numbers
100%
95,5%
91, %
.
87%
.83,2 %
79,5w
75,7%
72,5%
69,2%
66%
63%
60,2%
57,5%
55%
52,5%
50,1%
47,8%
45,7%
43,6%
41,6%
39,8%
38%
36,3%
34,6%
33,1%
31,6%
3J,2%
28,9%
27,6%
26,3%
25,1%
~4%
2z.9%
21,9%
20,9%
20%
19.1%
18.2%
17.4`%
16.6%
15.9%
15,3%
14.5%
13,8%
13,2%
12,6%
12,1%
11,5%
11%
10,5%
tha rc.dic',tion maximuu directed toword.j the 38 I horn. With the for,
x_ :Toole; Thu attenuation of the attenuator in the 38 I is 36 db with
is 34,2 db. Tho difference is 36 db-34,2 db = 1,8 db. By moans of
the table we find that this value is equal to 66%.
The reading froze the toblu should bu d:)na in the following ways
scale is 5.8 db. F'ird in the firot column the intggrnl number 5,
and in the flint horizuntal line the frLotion 0,8. In the cross if
E os. The difference between the indications on the attenuator
,
the expression of thu declblo value in porcont.
In thu place tore thq respective column and the lino-cross
fin'
tcibol nd=bor,
no find the number, correapandin3 to the deothal fraction of the
nuabor is: the respective decibel value. In the firut horizontal l.1-.
find in the.firs t column the number corresponding to the integral
 ';I R-R-C-R-F-T:
was 2, etc.
Example It The difference read from the cAtenuator scale is 16,2.
Exclude the tans, i.e. 16,2 - 10 = 6,2.. The result obtained from
the table is k4%. Divide the result sbtained by 10 and the final
result is 2,4%.
Example ct The difference road from the attonuator scale is 33 db.
Exclude the diliit 3, and the rest is 3 db. Find the corresponding
value in the table, i.o. 50%. Divide the obtained result by 1.000,
and thu fin.il result is 0,05`x.
12) From tho results obtained draw the curves of the vortical and
horizontal radiation patterns of the antenna and check their
forms, as. described in r, 301;, Iteme.l6, 17 and 22.
13) Switch off the power-supply if the ruder bomb eight and the
231 amplifier. Couple the gears of the azimuth diffrentinting
mechanism and the ulectro-mechanism MPR-2 with the main gear
of the antenna of the radar bomb sight.
C. Supplementary msthods of moasure;aont of the radiation pattern
of the radar bomb eight antenna.
10, if the excluded digit was 1, or by 1009 if the excluded digit
suiting number is 26,3%.
If the dacihol value exceeds 10, exclude the tuns and convert
tha rest as explained above. Then dividd the result obtained by
-152-
the hors ontcl line ( 5th line) and the column marked 0,8,50X1-HUM'
inlicotion. S -E . -C . -R-E . -T ------
of the wave;uide-to coaxial junction is too high to permit a
convenient reading.
The 31 IM or 34 IM instrument with its connected horn antenna
should be installed with the measurement at the same height and
distance from the radar bomb eight antenna as with the measure-
m.,nt described above under 4 306. The conversion should be done
by secno of Table 7. In this measurement method, the power out-
put meter of the standard si?rwl 3onorator 431 may be used for
However, with this method the horn antenna must be directly coup-
led to the wavaguide jutput of the instrument, as the attenuation
while maintaining a stable indication of the power output motor.
1) With the measurement of the radiation pattern by nouns of'the
31 IM jr 34 I4 instrum,nts the reading may be done from the sea
is of the attenuators instead of the power ouyput meter scale
- ~~ No Foreign.Dieeem ......
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 L
S-E-C-R-E-T
No Foreign.Diseem
ao roreign Diesem
153 ??
two hours the pressure inside the transmitter cover may not decree-
80 by mare than 0,04 atm., and after 10 hours by 0,2 atm.
$e Inspection of the hermetical pealing of the waveguide system
radar bomb sight antenna. The uignal generator operates with
pulses of maximum, length ( 10J microeec.).
The klystron of the signal generator should be tuned to 9,370
Me/s. Thu measurement of the radiation pattern should be dons
as described above. The reading should be done from the scales
of the attenuators of the signal generator with stable indica-
tion of the voltmeter in the 28 I amplifier. The conversion
should be done by means of Table 7.
$_31. Inspection of the hermetical sealing of the transmitter.
Pump the air through the nipple on the transmitter unit to ob-
tain a pressure of 0,4 atm inside the cover. Disconnect the hose
of the pump from the nipple and attach a mercury or pointer mano-
meter with a 0,5 atm scale. Do not use the manometer with a 4 atm
scale from the accessory equipment of the radar bomb sight...fter
2) If & stand is used on which only the cntenna without 50X1-H U M
wo'?
matter can be rotated, the uooauremont may be dono'by using the
r--dr.. bomb eight antenna for reception in contradistinction to
the above described mocaurumont methods tore this antonno
was used far tranamiesion. The antenna of the radar bomb sight
now receives the signal radiated by the signal Lonerator type
431 or 511. The detector cell from the accessory equipment of
the 521 should be connected to the waveguide output of the an-
tenna. The detector cell is coupled, by moans of a coaxial cable
to the ".81 amplifier. The antenna of the radar bomb eight and
the signal generator are installed at a distance. of 8-9 meters
from each other, and the waveguide output of the signal gene-
rator with the horn antonns should be installed in the horizon-
tal plane intersecting the medium part of the. reflector of the
1) Connect the pump with the.waveguide nipple by means of ahose.
Switch in the power supply cable of the pump to a 27V mains.
.otter this a signalling lamp "Heating" should light up to the
control panel of the pump.
 ii c_c_n _n_c~ m.
agnet-
ran
current
(ma)
61 8
10
9-12
S-E-C-R-E-T
No Foreign Diseem
2) Set the switch on the control panel,of the pump to position
"On" and measure the time necessary for increasing the pres-
sure inuide the waveguide to 1 atm. The time should not exceed
2 minutest .,fter a. pressure of 1,1 atm is ontuined, the pump
:should antomatically stop.
3)lueasure the time from the beginning of the operation of the
pump to the beginning of the further operetiory cycle; the ti-
me should be at least 15 minutes. The pressure at which the
pump is automatically switched on, should be a,8-0,9 atm.
The pumping time ohould not exceed 1 minute. The measurement
of the pressure in done by moans of the manometer of the pump.
50X1-HUM
INSPECTION OF Ti HdICa,L P,Re4ETERj OF THE R11L,R BJ41i3 SIGHT
Item Parameter to be
doe. inupected
1 Exterior appearance and
the position of the ar-
rangame:lt
2' Length of the transmit-
Should be:
ter pulses and magnetron
s and
u e
loongth of
current with various ran-type of
recur
the pul-
Pea aryl ty s f -
po 0 opera
operation runes .
sea
tion of the eauipment
frequen
(r sec)
of supply volatge
"Scanning"
1,250
0,3510,J5
8 / 60
"Scanning"
577
1,0 J,1
100, 200
"Beacon"
330
2.0' 0 2
3 .,vurago transmitter po- At least )6 W
wer with 1 microsoo.pul-_
so length, pulse recurren-
ce frequency of 577 c.p.s.
ar4 115V of power supply d
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 10
I
- 155 -
B-E-C=R-E-T
firing occurs
50X1-HUM
MMuw3t not exceed the respective values
of the magnetron current by more
than 5 me
5 Peak voltage of the pulse Not over 90V with the reliable ope-
at which the transmitter ration of the transmitter.
6 Discharge in the trans-
mitter at normal atmos-
pheric pressure
7 Decrease of pressure in-
sidu the transmitter af-
ter 1J hours
If no trigger pulses supplied to the
transmitter no discharge may occur.
after the inspection, the transmitter.
performance muot be normal
8 "oceivur consitivity with at least 90 db ( related to 1 mW
1 microaec.pulse and.pul- level)
se reecurenco frequency
of 577 C.P.S.
9 Intermediate frequency of. Within the limits of 29 and 31 We
the receiver _
10 band paso of the inter- it low t 3.8 Mc/a
modiste frequency ampli-
fier, measured at the le-
vel of J.7 of the peak
value of the frequency
curve
12 Detector current with the 1'rithin the limits of 75-85 per cent
preliminary altitude tun- of the maximum detector current.
ing of the klyetron
11 Woximum detector current Within the limits of 0.4-J,9 ma.
measured by the muter of
the timer and control
unit with tuned detector
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 Performance of tae auto-
matic frequency control
circuit
14
Range of suppression of
the grin fora short pe-
riod after the p ~. ]s a has
been transmitted( time
gain control).
15
Width of the horizontal
radiation pattern nt the
Not over 3,,0; with
sight equipment of
the radar bomb
the series Nos.
half-power level with an
101 and up, not over 30.
arbitrary antenna tilt
within thu limits of 600
from the fundamental ra-
diation maximum
16 Shapo of the measurement Must fall inside the limits of the
horizontal radiation standard pattern curve
curve
17 Shape of the vertical
radiation curve
wave ratio in the anten- or not over 1,43 ( standing wave ;a-
na and wavoguide assembly tio) respectively.
at the frequency of the
magnetron
Should safeguard the cox.eet tuning
of the receiver with the rotation of
the antenna and in all positi.ons of
the range switch. Turning of the "Re-
ceiver tuning" control by ?250 must
not endanger the performance of the
4FC circuit.
standing ( travelling) At least 70% ( travelling wave ratio
19 Variation of the travel-, Not over 5%
ling wove ratio in the
course of .:ntonna rota-
tion by 3600
S-E-C-R-E-T
I!; No Foreign Diseem
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 fl
20 Sector scanned field of In arbitrary sectors of '0?, 120?,
vision of the antenna 180?, 240? and 3J0?.
The width of the 60? sector should
be 6J? - 85? with fast scanning and
53?- 70? with slow scanning. The
front woetor should be wider by 1J-
1~0 than the neighbouring sectors.,
With the operation of the optical
bomb eight the front sector width
should be at least 6J ( the deck
sector is not conaidirod).
21 Rotation velocity of the Must bete) with fast rotation
antenna with continuous 19-28 r.p.m.
rotation b) with slow, rotation
9 - 17 r. p.m.
22 Scanning ruts with see- must boss) with fast scanning
tor scanning 70-120 scans/min
b) with slow scanning
50-80 scans/min
23 Position of the contor May differ from th., position of the
of the front sector longitudinal marker by ? 50
with the operation of
the optical bomb eight
with fast scanning
zontal direction of the
fundam,ntal radiation
maximum
24 antenna tilt angles in Upwards at least 5?, downwards at
reference to the hors- Scoot 2J?
25 uccurancy of the reading better than t 2?
of to antenna tilt an-
glee on the indicator
of tha timer and con-
trol unit
__.S-E-C
R-E_T
g
No Foreign Dissem
Declassified in Part - Sanitized Copy Approved for Release 2013/02/19 : CIA-RDP80T00246AO69900080001-8
 I t t a m n n V m
nv='vaci~?~vvcw
50X1-HUM.
antanna tilt angle . p,:r sec.
Di3tortion of the cali-
bration circles with thu
rotation of tha antennd
in the 1J km swoop ratio
Not over 10 per cunt
rr(Iuancy division in ,must bas 1:1, 1:2, 1:5, 1:6, 1:]3,
the crystal controlled 1:25 ( with a tolerance of 1:24 and
mixer of the range it 1:26),
at 75kde ? J,0}.>6
Peak voltage of the pul- must be at least 1J5V at all pulse
so firing tlhu trangwit- . reccurenco frequencies
tar, produced in the
rang., urdt ,
rorform.nce of the( eye- Reliable-pcrfonnanco must be obtai_-
tom of step-delay bf the ''6d up to a range of 33J km in stops
beginning of the swoop of 2J km -
in the "aaaoon" typo of
oporc tion
3-E-C-R-E-T V:
' -- - No Foreign nlavnm lIT r--
Declassified in Part - Sanitized Copy Approved for Release 2013/02/19 : CIA-RDP80T00246AO69900080001-8
27 &.nge of swoop of the uuust be: a) from 8= 1 km to col 5ka
plan position isdic::tor with continuous change
tubes of range from b;1 to 60km,
b) 1JJ km
0) 2JJ km t 10 km
28 Chunge of the swoop am- :!uat not exceed 8 mm ( an irrogula-
plituuu on th:, pl.:.n po- rity of the sweep le:,gth with the
_t.on indic,-.tor with rotation of the antenne; of up to400m
0f
switching the swoop ratio on:tho 8 km swoop ratio is admissib.
lo).
29 Variation in the briyit- Possibility of regulation from mi-
noss of th.; c..llbration nii.nim to ,n^ imum brightness
m.rkars .nd the courco
murkor
 ,i
I
P,;riortuance of thj system .. delay of the beginning of the swoop
of continuous dulay of in reference to the transmitter pul-
thu beginning of the sweep se must be reliably obtained within
in the "Range" typo of
operation
computing iauchanism
36 ,ccuinncy of the range
moaaurc t+::nt by moan of
the computing meetinism
37 Cons ant error in tha
range meoauremont caused
by tha delay of the pulse
in the trunamittor and
receiver channels
38 :.ccurancy of coincidence
or the plain position in-
dic...tor sweep with the
antenna rot;: tion
39 Width of thi angle covu-
red by the couree line
type c operation
4J ..ccurancy of the position
of the eoursa m:xkor in
reference to the circular
scale of the tuba in the
"Seloyn zero" typo of
operation
41 icourancy of the position
of the diuplay on the
plan position indicator
screen in reference to
the north(J? of the azi-
muth eeale)in the"Compass"
blunt be within the limits from 1 km
to 30. km
blast bola) From 2 km to 14 km.,,
better than ? 130
b) from 16 to 23 km....
bettor than ! 2,)J km
Not over 250 m
Must not exceed;
a) maximum individual error - 4?
b) m;an quadratic error 1,5?
The curv..tura of the sweep trace
from the center to the circumference
of the ucroon muat.not exceed 3?
i4ot over 1,5?
a) maximum individual error not over
Declassified in Part - Sanitized Copy Approved for Release 2013/02/19 : CIA-RDP80T00246A069900080001-8
 42 Rate of change of the
angle of deflection of
to sulsyn transmitter
PDKC-45 in the azimuth
st-bilizution system
43 Vcrirtion of the bright- :should vary from zero to
Hess of the spot on the
screens
44 Focue_A of t ho spot on
the indictor tunes'
45 adjuotwunt of the posi-
tion of the beginning
of the owuop on the in-
dicator tubes with the
turning of the "Conte-
ring" potentiometers
46 Accuracy of tho trans-
mission of the .nglo of
deflection of the opti-
cal bomb sight, in rufo-
ranca to the course sta-
bilizer, to the ututor
of the ealuyn trunefor-
mor
47 accuracy of the compen-
sation of the bunk on-
glos in the transverse
stabilization channel
48 ..ocuracy of the porfor-
manee of the slant range
synchronization channel
with angles of eight up
to 600
Thu focuuins must not t;:ko place in
extreme pouitions ox the "Focusing"
potcntiometur control
Thu posiibility of edjujtm..nt of
the bugir.nizig of the ati,cep to the
cross-m-'&of the filter of the PPI
must be safeguarded, and the begin-
ning of tlza PPI sweep must be odjuatb-
blo by at least 5 mm. Thu beginning
of the monitoring tube uwoep must
be adjustable by at least 10 ape
'ust be bettor than 0,5? with drift
z;ngloa up to ; 2J? and bettor than
1? with drift ..ngles up to - 3J?
!duet but
a) with thu beak angles of 2 10?
u;u01 to lo, or butter
b) with b:nk anglee over ; 10?
equal to 3?, or better
Must bar
o), up to, altitudes of 4,OJOm equal
to ? 8J m, or better,
b) at altitudes over 4,JJOm equal to
2% of the altitude, or bettor
S-E-C-R-E-T
No Foreign Dissem II
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 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
~) No Foreign Ulesem
50 Rate of change of the Must bo equal to 4,50
par second,
coup:nuotion of the angle or bitter
of deflection of thu op-
tic,il bomb sight in the
coupling unit of the op-
tical bomb sight
51 roaition of the longitu- Must dir.:ct towards the zeru refe-
dinal mariner ronce of the nzimuth scale with an
accuracy of ? 1?
52 Values of the voltage atr:bilizod:
produced by thu power- +2407 1 10 par cunt I. L.djustable)
Supply unit +3JJV 1J per cunt
+105V - 1J per cunt
-150V 5 par cent
-.-55V - 10 per cent
dot st bilized:
+255V ;. 5 per cent( up
+265V - 5 per cunt
+4,JJOV - 25 por cent
+1,OJOV 30 per cunt
53 Performance of the equip-
ment with variations of
power supply voltage of
2?V = 10% and 115V ? 3%
ourius No
57)
mwt.be safeguarded, and.th~ follow-
ing Items of thu Technical rlgulo-
tiona must be reop.ctedt 2e, 28, 32
34, 37 and 49.
54 Performance of the pump The regulation) glvan ir. Ch..ptor IV,
and the sealing of the an- ? 32 Duet be respected
tonna and wavoguide as--
oombly
55 Performance of the hoe- Thu system must nutowcticplly cut in
tins system with thu tuuperuturea not undur -5?C
and cut off at tompur.. turea, rot over
+40?C.
Position of the tranavor-
se wtiariner with maximum
aapcnsion of the swoop
Must be in the center of the opera-
tlotul part of the awour within the
limits of 1 km:.
S-E-C-R-E-T 1:
No Foreign Dissem 1'
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 ? I a c+ n n n m
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(l/~` ?,I ?v rva cJ.5u uiencu+
162 -
L1 S T J 1 F I U U R 4j
1 Display on the indicator screens with the calibra-
tion of the coupling unit of the optical bomb eight 15
.2 Display of the chocking resonator pulse on the
screens 24
3; iv nemitt;:r with savor removed 26
4 iliaplay of the signal of the chocking resonator on
tho screen of the monitoring CRT during the tuning
of the receiver 36
5 Display of the automatic frequency control pulses on
the screen of the monitoring tube during the turning
of the "Receiver runin~" control knob in the clock-
wise diraction 37
6 Display on the screen of the monitoring CRT with the
chocking of the circuit of the time &.in control 39
Marking in the di.igmmo of the wave.guidc Joints 50
Display of tha pulses on the screon of the moni-
toring tube in position "4" of the tuba set tch
( division ratio of 1:5) 53
9 Display of range workers on the oscilloscope screen
with the frequency division ru do of 1:2 54
1J Display o rungea mnrkurs on the screen Of tho os-
cilloscope with..fr.:,quuncy division ratio of 1:6
11 Diopley of range maiicers on the oscilloscope screen
with a frequency division mtio of 1313
12 Display of range markers on the screen of the oscil-
loscope with the frequency division ratio of 1:15
13 Display on the screen of the plan position indica-
tor CRT with the inspection of the swoop ratio
14 iie;play on the screen of the synchroacope CRT with
the chocking of the step sweep-delay
15 Display on the screen of thi monitoring tube with
the coincidence of the measurement and calibration
pulses
16 Display on the plan position indim for ocrotan
during the inspection of the front aeet.)r
L R No Fnroinn nia YT'
$-E-C-R-E-T
Declassified in Part - Sanitized Copy Approved for Release 2013/02/19 : CIA-RDP80T00246AO69900080001-8
 50X1-HUM .
rrr,J
17 Position of thu radar bomb si;;ht antenna in the
ad,juatoment of the zero anteruia tilt
18 Display on the screen of the eynehroscopo with the 73
uvcluation o1 the constant error ("a") in the ran-
go :aeusure nt
87
19 Noraogrem for the evaluation of th,: " a coo 9G
20 l:rrengument of thu apparatus for the measurement
of the lenght of the transmitter pulse 53
21 Display on the screen of the synchroocapo with
the :.,~aoureraont of the pulse lenght 3.01
22 a.rrangemont of the apparatus with the aaoaurunt
of the average power of the transmitter and the
? lenght of trunoudttor pulses 1J3
23 Aerrangement of the-apparatus for the iaeasure:aunt
of the average transmitter power aboard the aircraft 134
24 The scales of the wavolenght-meter of the signal
gars rator type 31 IM or thu watt-and wavelengat-
rauter, typo 34 IMS
';g
25 Connection of the radar bomb sight transmitter
with thu signal generator in tha receiver sensiti-
vity measurement in th,y repair shop 118
26 Connection of the radar bomb sight transmitter with
th i
o
l
a gn..
generator in the receiver sensitivity
measurement aboard the aircraft .119
Display on the screen of the tronitaring tuba
with the measurement of the receiver sensitivity
28 arrangement of the apparatus ( standard signal
generator type 34 I) with tha muuouremont of the
receiver oen itivity 123
Display an the screen of the r-monitoring tube vy .th
measurement of the receiver sensitivit
y 126
3D arrangement of the apparatus (SwR meter typo 601)
used with the measurement of the standing wave -
rutio. of the antenna and waveguido chain of the
radar bomb sight "S
31 Arrangement of the apparatus used with the measu-
rement of the travelling wave ratio - 331
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 I~ S_F._C_R_F.T?
36 Curves of the
bo,ub sig)it
34 Display of the
the monitoring
35 ..rr,ingorent of
38 I types) in
pattern of tha
50X1-
HUM-32 rrequency response curve 'of the intermadiato
frequency amplifier of the radar bamb eight
receiver
33 %rrangoment of the connection of the pulse gene.
rotor 26 I with the transmitter of the radar
Page
136
modulator pulse on the screen of
tube ofa,tho radar bomb soight
the apparatus ( 31 IMF 34 I14 or
the msaeuroment of the radiation
radar bomb soight antenna
of thb radar bomb uoight antenna
37 Inspection of tao irregularities of the measured
vortioal radiation pattern of the antenna of the
146
radar bomb aeight 147
38 Standard curve of the horizontol radiation pattern
of the antenna of the radar bomb soight 148
 11
1 Poaltions of controls of the radar bomb soight
equipment previous to switching 2
2 Examination.of the brightness and focus of the
plan position indicator and monitoring tubes 51
3 Results of the inspection of the transversal
st..bilization channel of .the coupling unit of
tha optical bomb :oight
4 Table of inspection of the pe.r.ornanee accuracy
of the plant range synehroniz.;tion channel in
the coupling unit of th.; optical bowb seight.
to 1 mW, and ita absolute value
6 Example of the a.,iibr4Aion table of the wave-
lenght-motor, type 31 IM or 34 LW
7 Integral decibel numbore-Decimal fractions
of dacibala.
151
'I
If',I
9-E-C -R-E-T
No Foreign Diesem it
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L I S T J F T a B L E S
 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246A069900080001-8
CiLPTER I
? 1. - Switching of the equipment
4 2. - Check of the operation of thu radar bomb - sight.
ab
oard the IL-28 aircraft
9 3. - Inspection and calibration of the coupling
unit of the JPV-6 airborne bomb bight
9 4. - Inspection and zero course cldju,.tment of the
3ervomachaniem of the PS3N-M radar bomb eight
4 5. - InspectionSf thJ perforuanco of the airborne
PSBN-M radar bomb night by means of the check-
ing resonator typo 50 I
CHI.PTER II
4 1. - Roplacuaant of the special r.fe tubes
4 2. - nlignuont and checking of the transmitter
performance
$ 3. - `aceiver tuning
9. 1. - Inspaction of the radar bomb eight equip-
mont in the IL-28 aircraft prior to stayt
9 2. - E.camination of tha radar bomb night equip
went after landing
$ 3. - Regular maintenance of the radar bomb
sight equipment
$ 4. - Operation of the radar bomb night equip-
mint in low and high tamp=-; turee and in
increased humidity of air
CxMR IV.
$ 1. - Jrx nization of the in,poction work
$ 2. - Specific features of tha use of the micro-
2
30
33
wave measuring apparatus 50
$ 3. - Inspection of the D.C. voltage producod, by
the power supply unite of tha radar bomb
eight equipment
S.E-C-R-E-T dl
J RI~ Vrk.,
Nn Fnralnn Tie,,..... Ir
Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
au roreisn uieaem
l I: . - 167 -
50X1-HUM
Page
6 4. - .E%:Iaination of the brightneso and focus of
tha plan position inIicctor end monitoring
tubes
Q 5. - Exaiafnation of t..a cantering of the sweep on
the ucroons of thu plan posi
and the monitoring CRT
tion indicator
Q 6.- Chocking and ::djuetment o.f t
division in the range unit
he frequency
53
.Q 7. - Inspection and adjustmont of
the sweep ratio
55
Q 8. - Inspection of the swoop ampl
with the switching of the sw
itude variation
oop ratio
Q 9. - Checking of the shape-distortion of the ca-
librttion circul:. r maricore
Q 1J.- Inspection and adjustssont of the at(j) die-
continuous delay of thu beginning of the
sweep
9 11- Inspection aril cdjustmunt of the continuous
Malay of the bogimmimg of the aveop
dic::tion accuracy of the co;aputing mecha-
nisu unit
Q 13.- Inspection and sdjuatmunt of the position
of the sweep trace with the antenna rotation 79
$ 18.- Inspection of the r.,to of change of bearing
of the compasu selsyn-tronsmitter, type
I PKD-45, in the azimuth stabilization unit
4 19.- Impaction of the coincidence of the swo.:p
trcoo-with the movement of the compass 82
Is S-E-C-R-E-T
_ ..~.
No Foreign Diseem ~` --- ~' Declassified in Part - Sanitized Copy Approved for Release 2013/02/19 : CIA-RDP80T00246AO69900080001-8
of the longitudinal and course markers
9 14.- Inspection and rogul.;tion of the antenna
system rotation valucity
Q 15.- Inspection amd :djuotaant of the antenna
with sector scanning
Q 16.- Inspection and adjustaont of the untanna
tilt mechanism on the stand
Q 17.- Inspection of the accuracy of coincidence
 ~,
transmitter with tho pulse generator type
26 I
6 309-- Inspection of the vertical and horizontal
radiation pattern of the antenna
4 31. - Inspection of the honmotical sealing of the
transmitter
4 38. - Inspection of the hermatioal sealing of the
. waveguide system
5 20. - Inspection of the peak voltage of the trig.
gar pulse, produced by the range unit
421. - Inspection of the constant error in the
range measurement
4 22. - Inspection and adjustment of' the coupling
unit of the optical.bomb sight on the stand
23. - measurement of the lunght of the trans-
mitter pulses
4 ?4e - Measurement of the average power of the
transmitter
$ 25. - measurement of the operation frequency
of the transmitter
$ 26. --Measurom-~nt of the sensitivity of the recei-
ver
27. - Measurement of the travelling ( standing) wa-
ve ratio in the antenna and waveguide eystdff
4 28? - Dotenaination of the pass b::nd of the inter-
mediate frequency amplifier of the receiver
with the VHF signal generator, type 80-1 and,
the volt-ohm-mater, typo VK-2
29. - Inspection if the peak voltage of the pulse
at vbich the firing. of the truneaitter occur.
Inspection of the discharge voltage of the
Supplement No.1 - Inspection of Technical parameters
of the Radar bomb sight
3-E--C.-R-E-T ~,'i
No Foreign Diesem
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 Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8
NO FOREIGN DISSEM
SECRET
NO FOREIGN DISSEM
Declassified in Part - Sanitized Copy Approved for Release 2013/02/19: CIA-RDP80T00246AO69900080001-8