MIL-HDBK-162A
Volume 1
15 December 1965
Section 2
DATE: 1 July 1964
ITEM NAME: RADAR EQUIPMENT
COGNIZANT SERVICE: USN
TYPE: AN/APX-1
FEDERAL STOCK NUMBER:
USA
USN
USAF
USMC
STATUS OR TYPE CLASSIFICATION
Mfg(s) Name or Code Number: Hazeltine Electronics Corp.
FUNCTIONAL DESCRIPTION
RELATION TO SIMILAR EQUIPMENT
The AN/APX-1 is a receiver-transmitter used to
Some major units of AN/APX-1, AN/APX-1X,
automatically identify the craft in which it is installed by
and AN/APX-2 are identical and interchangeable.
response to received coded impulses.
A swept-
frequency characteristic permits it to receive
TECHNICAL DESCRIPTION
interrogations and transmit replies to a number of
interrogators, on different frequencies, over a wide
Frequency:
band. It can reply by predetermined coded pulses or
A-band - 157 to 187 mc
distress signal, or with modification to act as a sound
G-band - 194 to 212 mc
guide to "home" other craft. It can share time between
R-band - 172 to 182 mc (modification required)
two band ranges, one as interrogation reply and the
Frequency Sweep (A-band): From low to high
other for special fighter director purposes. It is used in
frequency in 3.0 0.6 sec; sweep retract time
conjunction with MK III IFF basic element I-Interrogator
does not exceed 1/7 of the sweep time
and basic element III-Responder, or with other basic
Frequency Drift: A-band - 1.0 mc
element II-Transponder equipment.
G- or R-band - 0.5 mc
AN/APX-1: 1
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