Volume 1
MIL-HDBK- 162A
Section 1
15 December 1965
ITEM NAME: METEOROLOGICAL SET RADAR
TYPE: AN/FPS-77(V)
RELATION TO SIMILAR EQUIPMENT
amplifiers associated with the antenna drive system
The AN/FPS-77(V) replaces the AN/FPS-68. The
have been removed from the antenna pedestal and are
AN/FPS-77(V) will differ from the AN/ FPS-68 in several
now mounted in the RT-639/ FPS-77(V) shelter for ease
distinct areas. The AN/FPS-77(V) has several built-in
of maintenance. The solid state circuitry which proved
test facilities. The main PPI has been changed from a
to be highly temperature sensitive has been replaced by
dark viewing phosphor tube to a daylight indicator
electron tubes. The modular construction concept has
utilizing a storage tube. The remote indicator has
been retained but with additional test provisions to aid in
likewise been changed to the daylight indicator design.
trouble-shooting.
A camera has been added for photographing the main
PPI, the RHI, and the A/R scopes of the main console.
The range markers have been changed from a
TECHNICAL DESCRIPTION
countdown circuit design. The elevation drive system
for the antenna (and the RHI scope) has been provided
Power Requirements:
115v ac, 60 cycles, single ph
with an elevation sector scan feature. The RT-639/FPS-
77(V) unit has been changed from a table-mounted
Transmitter; 5450 to 5650 mc, single
design, which proved very cumbersome in maintenance
band, single channel.
and servicing, to a floor-mounted design employing pull-
Receiver; 5450 to 5650 mc, single band,
out chassis construction. Front and back access to the
single channel.
RT639/FPS-77(V) has been provided. The servo
INSTALLATION CONSIDERATIONS
Siting: Fixed installation.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
Antenna Group OA-3493/FPS-77(V)
1
(Fixed Component)
Console Group, Meteorological
1
Set, Radar OA-3491/FPS-77(V)
(Fixed Component)
Indicator Group OA-3492/FPS-77(V)
1
(Variable Component)
Radome CW-603/FPS-77(V)
1
120
72
(Variable Component)
Receiver-Transmitter, Radar
1
24
36
48
RT-639/FPS-77(V)
(Fixed Com)ponent)
Tower AB-703/FPS-77(V)
1
840
198
(Variable Component)
Tower Section AB-704/FPS-77(V)
1
360
252
(Variable Component)
REFERENCE DATA AND LITERATURE
Nomenclature Card and AF Form B1 for AN/FPS-77(V)
AN/FPS-77(V): 2
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