TEST AND EVALUATION OF (SANITIZED) SIGNAL ACTIVATED DEVICE

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03424A000400040004-1
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 10
• Document Creation Date: December 27, 2016
• Document Release Date: April 28, 2014
• Sequence Number: 4
• Publication Date: December 1, 1958
• Content Type: REPORT

Declassified in Part - Sanitized Copy Approved for Release 2014/05/01: CIA-RDP78-03424A000400040004-1
TT AND EVALUATION
OF
SIGNAL ACTIVATED DEVICE
D EC EMBER 1958
-fSTAT
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03424A000400040004-1
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 ? CIA-RDP78-03424A000400040004-1
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1. GMRAL
1.1. The following report covers the testa performed on the engin-
eering model of a signal activated device (SAD) developed *
The device is intended to be used
with present and future video systems for the parpose of activating
auxiliary components it the presence of a pulse type signal.
cor 1.2. The results of the testa conducted mill form the basis for
recommending changes in later production models of the SAD.
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- STAT
STAT
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03424A000400040004-1
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03424A000400040004-1
vow'
2. D ESCRIMON
2.1. The signal activated device is a miniature electromechanical
device used to operate a companion recorder for a predetermined
period of 1.25, 2.5 or 5 minutes, or as long as signals are being
received at the input of an associated amplifier. When the recep-
tion of signals ceases, the SAD provides coded time information
to the recorder.
2.2. The SAD consists of the following components:
a) hi-stable multivibrator
b) standard watch movement
c) electromagnetic hack
d) printed circuit disc
A hack is an electromagnetic operator used to unlock a balance
wheel on a watch riechanism.
2.3. The input to the signal activated device consists of negative
polarity pulses approximately 5 microseconds in width and 50 milli-
volts in amplitude. an receipt of the first pulse, the hi-stable
unit acts as a switch and applies voltage to the hack coil through
an RC network. Operation of the hack starts the watch, which in
turn drives a rotary contact arm. At the same time, the action of
the hack closes a set of switch contacts to operate the associated
recorder motor. The input Signal also flows through a set of nor-
mally closed contact of a Neomite relay located in the SAD, to the
magnetic record head. The latch continues to run for a predeter-
mined period, after which time it connects a negative de voltage
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Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03424A000400040004-1
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03424A000400040004-1
v.'s/ 1