Volume 1
MIL-HDBK-162A
Section 1
15 December 1965
ITEM NAME: RADAR SET
TYPE: AN/FPS-18, AN/FPS-18A.
Vertical Beam Width: 30 deg approx Receiver
Search is limited from 0.5 to 30 degrees above the
horizontal reference line. The sets have identical dual-
Indicator: One 7-in. maintenance PPI Indicator
channel transmitters and receivers which operate
Ranges: 10 mi range with 2 mi range marks; 50 mi
automatically. If one channel fails, the other channel is
range with 10 mi range marks; 48 mi range slowed down
automatically interchanged with the defective one.
video without range marks.
RELATION TO SIMILAR EQUIPMENT
Duty Cycle: 0.0012 Average Power Output: 1200 watts
Receiver Noise Figure: 8 to 10 db Operating Voltages
The AN/FPS-18A is identical to Radar Set AN/FPS-18,
and Power Requirements: 120/208v ac, 60 cps, 3-ph, 4-
with the exception that it permits use of an additional
wire, 60 kw max INSTALLATION CONSIDERATIONS
type tower which requires a new type of waveguide,
Siting: Needs about one half acre of high, clear land
wiring harnesses, conduit cables and miscellaneous
with an unobstructed view of the horizon.
hardware.
Mounting: All components except the antenna group
TECHNICAL DESCRIPTION
are mounted on the floor.
Frequency: 2700 to 2900 mc (tunable)
Cabling Requirements: Prefabricated harness
Peak Power Output: 1 megw
furnished.
RF Power Source: V87-B or V87-C klystron
Pulse Width: 1 usec
Related Equipment: Coordinate Data Transmitter Set
Pulse Repetition Rate: 1200 pps (nom)
AN/FST-1, Control Monitor Set AN/FSW-1 and
Range Max: 50 naut mi
Coordinate Monitor OA-947/FST-1 when AN/FPS-18 is
Horizontal Coverage: 360 deg
installed as a remote gap-filler facility.
Rotation Speed of Antenna: 5.33 rpm(nom)
Horizontal Beam Width: 1.4 deg
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
Antenna Group OA-897A/FPS-14
1
2918
Transmitter Group OA-1140/FPS-18
2
84
56
35-1/2
1805
Power Supply PP-1497/FPS-18
2
84
44
34-1/8
1745
Electron Tube Liquid Cooler
2
46
30
56
MX-2010/FPS-18 605
Receiver Group QA-1231/FPS-18
2
84
40
24
844
Indicator Group QA-1339/FPS-18
1
40
18-1/2
30-1/2
213
Control Monitor C-2097/FPS-18
1
53-1/8
10
27
485
Motor Generator PU-366/FPS-18
1
2000
Voltage Regulator CN-385/FPS-18
2
40--1/2
24
20-7/8
495
Directional Coupler CU-453/FPS-14
2
7-3,'4
5-1/4
24-1/2
32
Waveguide Switch SA-436/FPS-14
1
11-3/4
13-1/4
13-1/4
34
Dummy Load DA-114/FPS-14
1
5
6-1/4
31-1/2
31
Mobile Test Cart FN-83/FPS-14
2
24
38-1/2
32
62
AN/FPS-18: 2
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