A. 1. IN MAKING THE VOICE RECORDINGS USED IN ALL INTELLIGIBILITY TESTS ASSOCIATED WITH THE ASR-1 RECEIVER, THE INPUT TO THE TAPE RECORDER WAS TAKEN FROM THE "AUDIO P.A." JACK OF THE ASR-1.

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03642A000300010008-9
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 27
• Document Creation Date: December 22, 2016
• Document Release Date: May 29, 2012
• Sequence Number: 8
• Publication Date: May 18, 1960
• Content Type: MEMO

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CONFIDENTIAL
18 May 1960
A. 1. In aakiv3g the voice recordings used in all intelligibility
tests associated with the ASR-1 receiver, the input to the tape recorder
was taken from the "AUDIO P.A." Jack of the ASR-l. In field use the in-
put into the tape recorder is normally taken from the "AUDIO DE." Jack
of the ASR-1.
2. The audio signal., when taken from the "AUDIO DEM." Jack, is
independent of the audio gain setting of the receiver. The output at the
"AUDIO P.A." Jack, however, is controlled directly by the audio gain con-
trol.
3. The frequency response viewed at the "AUDIO P.A." Jack drops
off._ -rapidly at frequencies below 1000 cps, while at the "AUDIO DEr."
Jack it remain" essentially constant from 50-1000 cps. The response above
1000 ,cps drops off at approodmately the same rate for both jacks.
B. . A save po is in ,the tc of thi4 report, ref
to tdi oft ASR-1
Lion i(o excegld the l ndwid1 L of t
M67- The above information should be kept in mind when reading para-
graph 2.10 and all other portions of the report concerned with the...Iperfoor-
manee of the microphone, transmitter., and receiver when used as a system.
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TO:
ROOM NO. BUILDING
210 Westout
REMARKS:
I can not be sure the
attached from you or If
they are not yours, will you kindly send
them to his. Thank.
0
FROM: TSD/TAG
ROOM NO.
BUILDING
EXTENSION
FORM NO.94 I aEPU_ Ces FORM 3!-I CPO: 1/5/-o-49Y445 (d)
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