TRIP REPORT - CR-17 COLLECTION RECEIVER

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03424A001200010015-3
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 22, 2016
• Document Release Date: August 2, 2012
• Sequence Number: 15
• Publication Date: January 29, 1960
• Content Type: MEMO

Declassified in Part - Sanitized Copy Approved for Release 2012/08/02 :CIA-RDP78-03424A001200010015-3
Off ice Memoranda
TE1T STATES GOVERNMENT
To The Files - Contract 161 Task Order 1
Collection Receiver
svsJECT: Trip P.eport - CR-17
/
DATE: 29 January 1960
1. On 25 Janua 1 60 the undersi ed and
SPS EA visited the
to monitor progress on t e - co ec on
receiver. Participating in the discussions were:
25X1
25X1
2. is presently constructing a breadboard model of the
CR-17 jrhic will be evaluated modified ~?rhere needed and used as
the basis for fabrication of the two prototype models to be delivered.
The specifications of this receiver stipulate that the sensitivity
of the pass bands be t+0 db down 1 me outside of the 3 db points.
has attempted to get this discrimination vrith the use of bandpass
RF filters and double tuned RF amplifier stages. Using conventional
NT-derived filtering sections, the contractor has been unable to get
more than a 30 db attenuation at the specified points 1 me outside of
the pass band. Subsequent work using a Buttex~~rorth filter S?rith 1~+
sections has produced considerably better results although the
filter has an insertion loss of 16 db. The specified points 1 me
outside of the pass bands are lF0 and ~+3 db doS?m~ respectively.
3. At the present time the channel RF amplifiers are producing
50 db gain- with an additional 30 db being provided by the video
amplifiers. The bride band (front end) RF amplifier is currently
giving 26 db gain which trill probably be insufficient due to the
rather high insertion loss caused by the Butterworth filter, The RF
front end wills therefore be retrorked to produce at last 30 db gain in
the prototype receivers, The contractor is using ~~ m.c pass bands in
the CR-17 receiver jrhich give 1-,~~- me between the 3 db points of adjacent
pass bands, At the cross-over points the sensitivity will be 30 db
down, This selectivity has been judged satisfactory to fulfill the
operational requirements of the receiver. Total power consumption
appears to be about 180 milliamps.
?~~
?~
i~~~AL
Declassified in Part - Sanitized Copy Approved for Release 2012/08/02 :CIA-RDP78-03424A001200010015-3
 Declassified in Part - Sanitized Copy Approved for Release 2012/08/02 :CIA-RDP78-03424A001200010015-3
SUBJECT: Trip Report - CR-17 Collection Receiver
mechanical layout of the receiver and the module sub-assemblies have
been completed and Fabrication of~the deliverable prototype models
is scheduled to begin in Februaryo
Distribution:
ubject File
' R+D Lab
OC-SPS
Y~Zonthly (2 )
EP Chrono
~~
Declassified in Part - Sanitized Copy Approved for Release 2012/08/02 :CIA-RDP78-03424A001200010015-3