LETTER TO (SANITIZED) FROM (SANITIZED)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03330A004100090044-5
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 5
• Document Creation Date: December 22, 2016
• Document Release Date: January 4, 2012
• Sequence Number: 44
• Publication Date: January 12, 1959
• Content Type: LETTER

Declassified in Part - Sanitized Copy Approved for Release 2012/01/04: CIA-RDP78-0333OA004100090044-5
12 January 1959
The attached specification .is a compilation of the subjects discussed
at a conference attended b
25X1
25X1
on 21 November 1958, 25X1
in Washington, D. C.
The nature of this document prevents our forwarding a copy to
but copy for is attached and it is
requested that you forward. this' copy to him in accordance with your
security procedure.
. SRSsnw
Enclosures
Set of Specifications
Copy of Specifications for
.-DOC (OX REV GATE 31 98 By 04
S~S~fC
ORIG COMP ____ OPI _ Sfi TYRE _p/
ORIG CLASS. PAGES REV CLASS .s
JUST O?G;L NEXT REV 02411 AUTHHI3 HR 1194
Declassified in Part - Sanitized Copy Approved for Release 2012/01/04: CIA-RDP78-0333OA004100090044-5
 Declassified in Part - Sanitized Copy Approved for Release 2012/01/04 : CIA-RDP78-0333OA004100090044-5
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TENTATIVE SPECIFICATION
The following is a general signal specification for the interoperation
of the Data Collector and Digital Converter units of the AS.-6 Field Unit.
Signal:
1. ALERT LINE The Alert line will. provide the Data Collector
with a negative-going 10 volt step (@ 15 milliamperes) for the purpose of
initiating the Data Collector Turn-On function. The a10 volt DC level
shift will occur approximately 280 milliseconds prior to the first clock
pulse of each readout operation.
2. CLOCK or READOUT LINE. The Readout line will provide
the Data Collector with clock pulses having the following specifications:
amplitude, 5 volts (0 to +5) minimum; duration, 175 t 25 microseconds;
repetition rate, 200 pps. The Digital Converter will provide these clock
pulses continuously during the time interval which commences approx-
imately 280 milliseconds following the Data Collector' alert signal, and
terminates upon. receipt of a stop pulse from the Collector.
3. INFORMATION LINE. The Information line will provide the
Digital Converter with the information stored in the Collector memory
unit. The first bit of information will be emitted by the Collector upon
receipt of the first readout pulse from the Data Converter and the time
delay therein will be less than 5 microseconds. The information pulses
will have the following parameters: amplitude, 5 volts (0 to +5) minimum;
Declassified in Part - Sanitized Copy Approved for Release 2012/01/04: CIA-RDP78-0333OA004100090044-5
 Declassified in Part - Sanitized Copy Approved for Release 2012/01/04: CIA-RDP78-03330A004100090044-5
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duration, 20 microseconds minimum; rise time, 8 microseconds maxi-
4. STOP PULSE. LINE. The Stop Pulse line will provide the
Digital Converter with a single pulse which is time coincident with the
last information bit received from the Collector. This pulse will consist
of a differentiated spike with the following parameters: amplitude, 5 volts
(0 to +5), minimum; rise time, 2 microseconds maximum; decay time,
3 milliseconds (approximately).
5.. CLEAR. LINE. The Clear :line will provide the Collector with
a clearing signal consisting of a negative 14 volt (unregulated) step which
will be capable of delivering at least 250 milliamperes of current (-14v
@ 250 ma).
Note: This is a change and was incorporated December 19, 1958.
6. PANIC LINE . The Data Collector will provide a Panic
Pulse (level shift) which will consist of a negative 10 volt step capable
of supplying 15 milliamperes of current to the appropriate relay circuit
(-10v @ 15 ma).
1. The inter-unit connections will be made through a fifteen
conductor cable (supplied with the Collector package)) which will be
approximately six to eight feet in length. The connector will be at the
Data Converter end of the cable and will be supplied byFlas soon
Declassified in Part - Sanitized Copy Approved for Release 2012/01/04: CIA-RDP78-03330A004100090044-5
 Declassified in Part - Sanitized Copy Approved for Release 2012/01/04: CIA-RDP78-0333OA004100090044-5
as the outside diameter of the cable is made known to them. The tenta-
tive pin numbers are assigned as follows:
1. Alert Line
2. Readout (Clock) Line
3. Information Line
4. Stop Pulse Line
5. Clear Line
6. Panic Line* *Note: The pin numbers of these
7. +14 volts two lines have been changed
8. +7 volts from the numbers originally
9. -7 volts agreed upon.
10. -14 volts
11. System Ground*
12. Reference Line (if used)
13. --
14. --
15. --
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Declassified in Part - Sanitized Copy Approved for Release 2012/01/04: CIA-RDP78-0333OA004100090044-5
 Declassified in Part - Sanitized Copy Approved for Release 2012/01/04: CIA-RDP78-03330A004100090044-5
FORM 697 REV. 6-58 25X1
25X1
DATE: 29 December 1958
January, 1959, AS.-6 Antenna Tests
The following frequencies are requested for use in the January, 1959,
AS.-6 field unit antenna tests:
Frequency
Alternate No. -1 Alternate No. 2
* Used previously
Declassified in Part - Sanitized Copy Approved for Release 2012/01/04: CIA-RDP78-03330A004100090044-5