MIL-HDBK- 162A
Volume 1
15 December 1965
Section 3
DATE: 1 July 1964
ITEM NAME: TRANSPONDER SET
COGNIZANT SERVICE: USN
TYPE: AN/UPX-12, * -12A, ** -12B***
FEDERAL STOCK NUMBER:
USA
USN
USAF
USMC
STATUS OR TYPE CLASSIFICATION
Sub. Std
Mfg(s) Name or Code Number: General Electric Company*; Radio Receptor Company, Inc.**
FUNCTIONAL DESCRIPTION
Transponder Sets AN/UPX-12, -12A, and -12B respond
to appropriate interrogations from Radar Recognition
Sets for the purpose of self-identification. They receive
paired-pulse interrogation signals and transmit single-
pulse identifying replies. Interrogations are pulse-pairs
in one or more of three modes as determined by the
spacing of the pulses in a pair. Replies to all modes are
single, one-microsecond pulses.
RELATION TO SIMILAR EQUIPMENT
Similar to the AN/UPX-5, -5A, and -5B equipments.
TECHNICAL DESCRIPTION
Frequency: Receiver, 1010 to 1030 mc;
transmitter, 1090 to 1110 mc
IF. Frequency: 59.5 +1.5 mc
Bandwidth: 8 to 11 mc at 6 db down
Duty Cycle: 0.1% while carrying pulses of 10-kw
peak power
Receiver-Transmitter RT-38?()/uPI-12
Minimum Output: 300w at 500 pps
Pulse Width: 0.9 to 1.3 -sec (50% of peak am-
plitude)
Operating Voltages and Power Requirements:
105 to 125v, 57 to 63 cps or 360 to 440 cps,
1-ph, 398w approx
INSTALLATION CONSIDERATIONS
Siting:
Mounting:
Cabling Requirements: Cables must enter the
cases without sharp bends. Interconnecting
cables between receiver-transmitter and de-
coder must not exceed 20 feet. The antenna
cable must not exceed 150 feet and other ca-
Decoder KT-200()/UPY-12
bles should not exceed 300 feet in length.
Related Equipment:
AN/UPX-12: 1
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