Volume 1
MIL-HDBK-162A
Section 1
15 December 1965
ITEM NAME: RADAR SET
TYPE: AN/FPS-3, -3A
Azimuth Resolution: 1.3 deg
to 7000 ft above. For GCI applications, the equipment
Range Accuracy: plus or minus 1 mi
is used in conjunction with a height finding radar set.
Azimuth Accuracy: plus or minus 1 deg
Power for operation, if not from a commercial source, is
Horizontal Beam Width: 1.3 deg
obtained from two 100-kv diesel driven generators and a
Vertical Beam Width: O to 3 deg lower,
spare. The AN/FPS-3, -3A also supplies power to
3 to 15 deg upper
associated height-finder, beacon, identification, and
Receiver Bandwidth: 0.4 mc
video-mapping equipment, although these equipments
IF. Frequency: 30 mc
are not part of the AN/FPS-3, -3A.
Indicator Type and Quantity: 4 to 12
PPI's
RELATION TO SIMILAR EQUIPMENT
Indicator Ranges: 50, 150, 325 mi
Radar Set AN/MPS-7 is the mobile version
Range Marks: 10- and 50-mi intervals
of the AN/FPS-3, -3A. Radar Set AN/FPS-3A
Range: 325 naut mi
is similar to and interchangeable with
AN/FPS-3. Differs in that AN/FPS-3A uses
INSTALLATION CONSIDERATIONS
Transmitter Group OA-398/FPS-3 and improved
Siting: The power shelter should not be located
components.
near the antenna or operations shelter, as the
noise and vibration makes operation difficult.
TECHNICAL DESCRIPTION
The distance separating the antenna tower and
Frequency: 1220 to 1365 mc
the operations shelter is limited to the length of
Power Output: 650 kw, peak (each
interconnecting cables. The antenna should be
transmitter)
located at least 500 feet from vhf
RF Power Source: Type 5J26 tunable
communication equipment and more if possible
magnetron
from uhf equipment to minimize interference.
Pulse Width: 3 or 6 usec
Mounting:
Antenna group is mounted on
Pulse Repetition Rate: 200 or 400 pps
Temperate
Tower
AB-178/FPS-3
or
(MTI available on 403 pps only)
AB196/FPS-3 or on Arctic Tower AB-199/ FPS-
Vertical Coverage: Up to 60,000 ft,
3. Remaining components, with the exception
15 deg angular
of the power units, are housed in the operations
Horizontal Coverage: 360 deg
building.
Antenna Tilt: -0.5 to plus 6.5 deg
Related Equipments:
Video Mapping Group
Antenna Scanning Rate: 3.3, 5, 6.6, or
AN/GPA-30, Identification Set AN/GPX-7, 7A
10 rpm
and Height-Finders AN/FPS-6, 6A, 6B or
Range Resolution: 0.5 mi
AN/IPS-1OD.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
Antenna Reflector AT-251/FPS-3
1
480
230
156
Pedestal AB-180/FPS-3
1
63
66
108
Antenna Support AB-179/FPS-3
1
160
89
101
Antenna Horn AS-488/FPS-3
1
96
60
138
Transmitter Group OA-398/FPS-3
2
42
39
43
600
Oscilloscope OA-17/FPS-3
1
Receiver Group OA-176/FPS-3
1
59
27
28
450
or OA-318/FPS-3
Indicator Group OA-175/FPS-3
0 to 12
44
24
45
412
Indicator Group OA-188/FPS-3
1
48
21
26
or OA-319/FPS-3
Radar Control Group
1
60
23
26
OA-179/FPS-3
AN/FPS-3: 2
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