Volume 1
MIL-HDBK- 162A
Section 1
15 December 1965
ITEM NAME: INTERROGATOR SET
TYPE: AN/GPX-8A
thus permitting the reply pulses to be displayed on the
TECHNICAL DESCRIPTION
associated radar PPI in close association to the radar
target being identified.
Transmitted Signal: 1030 mc plus or
minus
12
mc, one channel
The addition of Decoder Group OA-1133/ GPX-BA
Received Signal: 1090 mc plus or minus 10 mc, one
adds Mark X SIF (Selective Identification Feature)
channel
decoding facilities to Radar Identification Set AN/GPX-
Operating Power Requirement: 117v ac, 60
cycles,
B, and the resulting modified equipment is designated
single ph
as AN/GPX-8A. The addition of SIF to the Mark X IFF
system means that aircraft replies are now coded and
INSTALLATION CONSIDERATIONS:
must be decoded in the ground equipment.
Siting: The locations of the radar operating site will in
The AN/GPX-8A has independent Mark X SIF
all cases be suitable for the AN/GPX-8A.
decoders for each of the three operating positions
normally provided in a radar identification set
Mounting: The Radar Identification Set AN/GPX-8A is
installation. Facilities for control of one of the three
designed physically to mount in Equipment Rack
decoders, as well as control of the associated radar
MT-1570/GPX-8. If space requirements prevent the
identification equipment are provided at each operating
mounting of the Radar Recognition Set AN/UPX-6,
position.
the Beacon Coder KY-166/GPX-81 and Decoder
Pulse KY-299/GPX-bA within the Rack, these units
RELATION TO SIMILAR EQUIPMENT:
may be installed as separate units.
Similar to and interchangeable with Radar
Related Equipment: The AN/GPX-BA is for use with
Identification Set AN/GPX-8, the difference being this
Radar Set AN/CPN-4 or Radar Set AN/MPN-11.
set also decodes the response from Transponder Set
AN/APX-25.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
Decoder, Pulse KY-299/GPX-bA
1
6-13/16
19-1/2
20-7/8
57
Control, Decoder C-2982/GPX-8A
3
12-3/4
5-1/4
3-7/16
7
Cable Assembly CX-4846/U
1
1
(9 ft O in.)
Cable Assembly CX-4846/U
1
1.25
(12 ft O in.)
Cable Assembly CX-4846/U
1
1.5
(17 ft O in.)
Cable Assembly CX-6027/U
2
1
(6 ft O in.)
Installation Kit MX-470/GPX-BA
1
3
Beacon Coder KY-166/GPX-8
1
8-1/2
19-1/2
20-13/16
52
Interconnecting Box J-672/GPX-8
1
8
20-3/8
2-3/4
12
Electrical Equipment Rack
1
29-7/8
18-1/2
22-7/8
32.5
MT-1570/GPX-8
Radar Recognition Set
1
11
21
15
77
AN/UPX-6
AN/GPX8A: 2
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