Volume 1
MIL-HDBK-162A
Section 1
15 December 1965
ITEM NAME: RADAR SET
TYPE: AN/MPX-2(XN-21)
Operating Power Requirements: 115v ac,
Trailer Equipment. The Trailer Equipment provides IFF
60 cps, single ph
Mark V identification signals correlated in range and
Total Output: 4 kva
azimuth with radar and MTI (Moving Target Indication)
Power Factor: 85% pf
echoes. The system also provides for visual or aural
reading of the slow coding of IFF responses.
INSTALLATION CONSIDERATIONS
Siting: Mobile.
RELATION TO SIMILAR EQUIPMENT
Related Equipment: The AN/MPX-2(XN-21) is designed
None.
to be used with, but not part of Navy Models SO-7M,
SO-7N, SO-12M, SO-12N, SP-1M, and Radio Set
TECHNICAL DESCRIPTION
AN/TPS-1B, and Radar Set AN/MSG. The AN/MPX-
Type of Signals: Coded pulse signal
2 (XN-21) is part of the Mark 5 IFF system.
Number of Channels: 12 channels
Operating Frequency Range: 950 to 1150 mc
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENTS
QTY
OVERALL DIMENSIONS
UNIT WT.
(Inches)
(Pounds)
Radar Set AN/CPX-4
1
14-1/4 x 17-1/4 x 22-3/8
126
Directional Antenna AN/UPA-11
1
consists of:
Antenna
1
9-13/32 x 13-13/32 x 111
51
Antenna Pedestal
1
10-1/4 x 11-27/32 x 20-1/8
48
Train Control
1
8-19/32 x 11-15/16 x 13-1/8
27
Servo Amplifier
1
12-3/16 x 16-3/16 x 18-7/8
75
Antenna Mast
1
106
Radar Interconnecting Assy
1
AN/UPA-20 consists of:
Coordinator SN-28/UPX
1
9-3/4 x 17 x 17-1/4
108
Audio Decoder Unit KY-12/UPX
1
9-3/4 x 17 x 17-1/4
109
Video Decoder Unit KY-13/UPX
1
9-3/4 x 17 x 17-1/4
107
Radar Test Set AN/UPM-6
1
13-1/2 x 13-3/4 x 17
62.4
consists of:
Test Set Case
1
15-1/2 x 16-3/8 x 38
32.7
Power Unit PU-116/U consists of:
Engine
1
19-5/8 x 29-1/2 x 34-3/'1
372
1
13 x 15-1/2 x 21-1/2
164
Trailer V-16(XN-21)/MPX
1
80 x 101-1/2 x 133-1/2
Case CY-649/U
1
19-3/16 x 22-13/32 x 12-1/16
180
Terminal Box J-274/UPX
1
2-3/4 x 14-1/4 x 20
13.5
Reel RL-133/U
3
10-3/8 w x 25 dia
387
REFERENCE DATA AND LITERATURE
Technical Manuals:
NAVSHIPS 91057
AN/MPX-2(XN-21): 2
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