MIL-HDBK-162A
Volume 1
15 December 1965
Section 1
DATE: 1 September 1964
ITEM NAME: CODER-DECODER GROUP
COGNIZANT SERVICE: USAF
TYPE: AN/GPA-78
FEDERAL STOCK NUMBER: 5B95-604-7459-EG
USA
USN
USAF
USMC
STATUS OR TYPE CLASSIFICATION
No Status
Mfg(s) Name or Code Number. Bell Aircraft Corporation
coded reply is transmitted back. The coded reply is
FUNCTIONAL DESCRIPTION
perceived by the receiver portion of Radar Recognition
Set AN/UPX-6, detected, and sent to the Coder-Decoder
The Coder-Decoder Group, conjunction with Radar
Group where it is compared with the mode and code
Recognition Set AN/UPX-6, generates paired-pulse
requirements and, if correct, it is coded. The decoded
coded interrogations. When these interrogations are
signal is then displayed on the Radar Set Plan Position
received by an airborne Transponder Set AN/APX-25, a
AN/GPA-78: 1
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