Inspection Report No. 3 - AS-12(Classified)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-02820A001200060004-8
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 9, 2016
• Document Release Date: May 15, 2001
• Sequence Number: 4
• Publication Date: November 22, 1966
• Content Type: MF

OPTIONAL FORM NO. 10 3010-101
App F.' ,13elease 20011rf/28 : Cl - f- 82OA0012000600OW8
UNITED STATES GOVERNMENT
Now
11
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SUBJECT :
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Memorandum
.The Files: Contract No.
Inspection Report No. 3 - AS-12
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Project Description:
Approximately three months of on-the-air tests will be conducted
to determine how well the AS-12 operates, what ionospheric phenomena
permit or prevent it from working, what changes should be included
in future units, and what are the best procedures for operating.
the AS-12.
Contractual Information:
Date of Meeting: 17 November 1966
a. Initial Cost:
b, Request for Procurement Action: 1 April 1966
c, Initiation Date: 2 May 1966
d, Completion Date: 28 February 1967
e. Deliverable Items: Monthly progress letters, final report
.46
Place of Meeting:
Persons Attending:
Agency
Mr.
Mr.
6. Contractor's Performance:
Mr,
Mr.
Non-Agency
a. On schedule and expected to remain so: Yes
b. Within obligated funds and expected to remain so:
c, Satisfactory technical progress: Yes
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proved For Release 2001/07/28 A?(~!
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EP 66-252
DATE: 22 November 1966
Yes
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 Approved For Release 200W7/28s:CIA_gP78-0282OA0012000600 -8
EP 66-252
SUBJECT: Ins e~ ction Report No. 3 - AS-12
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Project Status:
Extensive tests of the Interference Detection Unit (IDU) indicate
that the receiver is performing as it had, when initially accepted.
The addition of the attenuator to the front end appears to have soivdd
the problem of rejected bands.. Twelve field transmissions were made
during a seven hour period on '2 November 1966. On 3 November there
were 14 transmissions over an eight hour period. A lOdb pad was then
inserted between the antenna and the IDU. There were 102 transmissions
during nine hours on 7.NQvember and 74 transmissions d wing five hours
on 8 November.
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- is assembling a set of band pass filters to be used in
place of the lOdb attenuator. These filters will each have a passband
of about 200Khz. (The IDU front end is 3.5Mhz wide.) Preliminary
tests indicate that these filters will control the intermodulation
problems adequately without degrading the receiver noise figure as
the pad. does. Reed relays will be used to switch the filters in and
out of the circuit.. It is expected that the filter installation will
be completed. by 23 November.
On 15 November the system performance suddenly disintegrated..
Though the field transmitted 69 times, no messages were confirmed.
The following day showed similar results. Mr. went 25X1A9a
from to the base station on 17 November. Early in the after-
noon of 1 November he located the cause of trouble. During tests on
14 November, the cables from the control unit to the IDU and the
communications receiver became reversed. As a result, the receiver
was listening for the field transmission before the sounding occurred,
rather than after. Naturally, results were negative. The connections
were corrected and normal operation resumed. To my knowledge, this is
the only operator error of 'any consequence that has occurred on this
program.
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Distribution:
R&D Subject File
OL/PD/PCB/CAS
R&D Lab
0C-0S
ESB
Monthly (3)
EP Chrono
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~/3152 23 Nov8-66) 25X1A9a