FAMILIARAZATION AN OPERATIONAL EVALUATION OF INFRARED LONG RANGE VOICE EQUIPMENT

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03330A000800020013-3
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 5
• Document Creation Date: December 23, 2016
• Document Release Date: May 8, 2014
• Sequence Number: 13
• Publication Date: May 8, 1955
• Content Type: MEMO

Declassified in Part - Sanitized Copy Approved for Release 2014/05/08: CIA-RDP78-03330A000800020013-3
9 May 1955
A
MAID ?OR Mk FILMS
SUBJECT! Infrared Communicetiono BOnionsat
PURPOSE! Familiareaticn sod Opersticsal Evaluation of Infrared
Long Range Voioe Bruise's*.
1. On Thursday, 5 May 1955, ? trip was made to
by the fallowing Agency personnel!
The purpose of the trip was to operate and evaluate the TSS/
developed infrared long range voice communications
eruipment.
2. The equipment consisted of taro package units. 'tech
packspe consisting of a col,p.Late transmitter, receiver, viewer,
powersupp;r, stand and carrj.ing case. See Attachment A. The
eruipment *hen pacKed weighed 30 pounds per unit. During the
tests all members nf the prrty and operated the aA-,uip-
ment.
3. Tests began on the criiing of arrival at approximately
1100. Two tests rare :ads at this time, two at 1500, and the
concluding two te ti At :.300. A total of six teetr were red.
over a 12 tour period. The tests were made under the following.
conditionat
Diurnal--clear and strong sunlight
Nooturnal--clear And slightly deep with a Pill Limn
for good visibility
*Distance-60OG feet
Terrsin----over both level earth, and, level earth
and concrete
*Although this is long range equipment and is reported to have
worked satisfastorily over a distance of 13 atlas it was not
possible due to line of sight requirements and security eon,.
siderstions to work over a greater dist/moo than 6000 feet.
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Declassified in Part - Sanitized Copy Approved for Release 2014/05/08: CIA-RDP78-03330A000800020013-3
Declassified in Part - Sanitized Copy Approved for Release 2014/05/08: CIA-RDP78-03330A000800020013-3
4. Tests number 1 ssa4 2. tpfirenimataly 1.5 mimetes was
spent in setting up the equipment. Co Sleet woe thsn established
over earth ten minutes after the setup. This quality et *pooch
was good, with a strong signal and toed readability. On test
numbor two the units were disaligned fres each other and thee
attempts were aide to realign then and establish contact bast
without auoeess. The units were than rspaolled and the next two
tests scileduled for the afternoon.
5. Tests ) and 4. Prior to the teats. the MS represen-
tative explained the electronic and optical operatic:a of the
souipment to the other three mere of the party. Teat amber
3 was performed at 1500 over ? terrain if both earth and concrete.
The quality of speech was poor. A strong signal was present
ut tne readability of the sipal was very poor due to high
t a kgro nd notes and 'mat refraction of the modulated tignal.
In the next test, test number A., the equipment was moved to ?
iirect over the earth path only. ApProximatel,y 45 .rinutes was
spent in trying to establish contact without wawa.. A
t.-oro.igh t-heck of the equipment then showed that in roving it
the bellows tack has came loose thereby disaliening and defocusing
t ?.e hoar. completel,y. The beLlcwe wa -elocked and contact
established almost immediately. The quality of ipso" we. good
with Ppproxiastely the same simal strength but a great improve-
:Tient in the readability of the signal. The test for afternoon
coni.Utions was eomileted; the equipment was repacked.
6. Tests 5 and 6. Ti final two tests were made at 23?Ci.
One unit was set up and t.tontsot ?sta*.liehed for both testm
using loonlight for illuatination only. The speech and signal
quality in hat. tests were axe-silent. Absolutely no trouble'
was foond in estaLiaung ontect nr oommunic ? ions with each
other. The ur it e were then repacked and the tests ?toricludod.
7. tipori completion of the tests and analysis of reau...ts
? he deficiencies of the equipment were discussed and the following
Items recommended for improvement.
I. STAND AND TURNTABLE
a, The present tubular legs are to be made solid at. the
joint locat tm. The slip ring broadened and the tapered part
of the la,Miich goes under the slip ring will be lengt'vaned...
U. The springs holding the leo to he turntable were.
broken in one case. This was believe fi due to their bIviig.
been painted and the action of the :mint reducIng. the elasticity
of the spring. A.A. broeen springs are to be replaced and tested
again.
Declassified in Part - Sanitized Copy Approved for Release 2014/05/08: CIA-RDP78-03330A000800020013-3
Declassified in Part - Sanitized Copy Approved for Release 2014/05/08: CIA-RDP78-03330A000800020013-3
Page 3
o. The turntable yetis will be aedbeed is siee and weight
and a seals for calibrated eettifts 016004 0011 ii?
d. The present titumb *crews holding the wit in the yoke
will be replaeed by one thumb eon* fres the yoke side of the
*aliment.
e. The vertical deflection adjust screw will be changed
and a larger knob laced on it.
II. SELLCV3
a. Thehleeder on the bellows will be increased in else.
b. The bellows 411 be Lade of a better Aiaterial than ?
ir,present.y tieed. The present pateriel has a tendency to billow
and fold wrong and uder taut,' would crack open.
7, Th. braces holding the bellows open will re changed
to the sliding type and if possible will have an automat ic
lock on them.
III.. CARRYING CASE.
a. The catcreis used On tie carrying case will he reduced
in nualb-ir and ortrengtnened.
b. The hen 11e of t im carrying CAPS will be increa-ed in
ails.
IV.
a. A front cover for the lead soliviide cell and the viewer
will he provided.
b. A recorder jack will be claced in the equipment.
c. A key input whereh the LOCO cycle tone nay be mores
keyed when the eqipment is in t. ie transmit-find position will
be added.
d. A shade or cap will be fitte I over the odulittion
indicator to provide additional security for night operation.
?. The pros nt volume control will be changed free'lineer
to logarithmic taper.
f. A sighting device et some type, either ago Anical or ?
optical will be added to the equipment.
-
Declassified in Part - Sanitized Copy Approved for Release 2014/05/08 : CIA-RDP78-03330A000800020013-3
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Declassified in Part - Sanitized Copy Approved for Release 2014/05/08: CIA-RDP78-03330A000800020013-3
Declassified in Part - Sanitized Copy Approved for Release 2014/05/08: CIA-RDP78-03330A000800020013-3
Declassified in Part - Sanitized Copy Approved for Release 2014/05/08: CIA-RDP78-03330A000800020013-3
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Declassified in Part - Sanitized Copy Approved for Release 2014/05/08: CIA-RDP78-03330A000800020013-3 _7,