Volume 1
MIL-HDBK-162A
Section 3
15 December 1965
AN/SPS-4
TECHNICAL DESCRIPTION
FUNCTIONAL DESCRIPTION
Frequency: 5450 to 5825 mc
Radar Set AN/SPS-4 is a medium power surface
Power Output: 180 kw (min)
and zenith search radar equipment which may be
Pulse Repetition Rate: 625 to 650 pps
operated at any frequency in the 5450 to 5825 mc
Pulse Width: 0.37 to 1.3 sec
range. It has a special dual antenna which permits the
operator to observe targets either on and near the
IF. Frequency: 30 mc
surface of the water or approaching from overhead.
Narrow Bandwidth: 1 mc approx
Broad Bandwidth: 5 mc approx
Targets are presented on the screens of a range
Operating Voltages and Power Requirements:
indicator and a range repeater as well as on other
115, 220,or 440v 10%,60 2 cps, 1-ph, 4.5
repeaters in the system.
Both 1and 36-speed
kva max, 89% pf
information is required to operate the synchro signal
Antenna Rotation Speed: 5 and 15 rpm or manual
amplifier while the rest of the system requires only l-
Horizontal Beam Width:
speed information.
Surface Reflector - 1.7 to 2.3 deg
Zenith Reflector - 3 deg approx
RELATION TO SIMILAR EQUIPMENT
Vertical Beam Width:
Surface Reflector - 14 to 16 deg
The AN/SPS-4 is similar to Navy Model SG-6b
Zenith Reflector - Max radiation at 21 deg
except for changes in the antenna, the transmitter, and
above horizon
the receiver to permit operation on lower frequencies
and at a higher power output.
INSTALLATION CONSIDERATIONS
Not available.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
Radar Receiver-Transmitter
1
65
39
22
800
RT- 197/SPS-4
Range Indicator NT-55AGJ
1
32
21
18
182
Radar Modulator MD-132/SPS-4
1
40
30
17
345
Antenna Assembly AS-508/SPS-4
1
106
84
69
476
Training Control Amplifier
1
30
25
16
275
NT-50AJN
Power Transformer NT-303880
1
16
13
11
167
Synchro Signal Amplifier
1
22
15
11
150
Mk 2 Mod 2B or Mk 27 Mod 4G
Indicator Unit NT-55AGU-1
1
33
21
20
258
Driver Unit NT-50AKX
1
36
18
15
281
Delay Unit NT-50AGG
1
25
22
13
155
REFERENCE DATA AND LITERATURE
Technical Manual:
NAVSHIPS 91724(A)
AN/S PS-4: 2
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