group (unit 8) has a synchro test point panel to monitor
input synchro voltages.
The OCC installed in the equipment room (unit 15)
is a system/bootstrap bus monitor (SBBM) that
performs on-line system testing and troubleshooting,
and computer bootstrap program loading. The memory
loader/verifier (MLV) (unit 13), stored in the equipment
room, is used for the following purposes:
Load and verify operational programs from
cassettes
Initiate AN/AYK-14 self-test and display results
Load diagnostics and provide maintenance
interface and control
Write cassette memory with received data
Display and change register and memory
locations
The SPN radar test set (RTS) (unit 22) is used to
align, calibrate, and maintain the radar/SMS subsystem.
The retractable alignment mast (unit 23) elevates the
SPN RTS and a collocated corner reflector to a
minimum of 19 feet above the carrier flight deck for
system calibration. The UPM radar test set (unit 26) is
also used to test and calibrate the radar/SMS subsystem.
This test set combines the functions of a spectrum
analyzer and synchroscope to provide pulse or CW test
signals and visual spectrum indication. It also has a
direct reading cavity frequency meter, and a power level
meter.
Maintenance
Organizational maintenance is performed by ET
personnel (NEC ET-1524). It consists of removal and
replacement of plug-in assemblies and chassis-mounted
parts.
You can isolate faults using the
built-in-test (BIT), built-in-test equipment (BITE),
general-purpose electronics test equipment (GPETE),
special-purpose test equipment (SPETE), and
maintenance assist modules (MAM).
Depot level maintenance includes repair of failed
printed circuit boards (PCBs) or modules and major
repairs, such as overhaul, refurbishment, and
calibration.
AN/FPN-63 PAR
The AN/FPN-63(V) Precision Approach Radar
(PAR) is used at naval air stations (NAS) and Marine
Corps air stations (MCAS) for air traffic control
operations.
It replaces the PAR portion of the
AN/CPN-4 family of equipment. The AN/MPN-23 is a
version of the same equipment mounted on a trailer.
General Theory of Operation
Although the AN/FPN-63(V) is functionally and
operationally similar to the PAR portion of the
AN/CPN-4, it uses a modified version of the
AN/CPN-4A PAR antenna system. The antenna
modifications reduce signal side lobes and minimize
ground and precipitation clutter. The AN/FPN-63(V) is
based on solid-state circuitry and includes a digital
moving target indicator (mti). The modification also
includes a remote control subsystem that provides
complete operational use of the PAR up to 10,000 feet
from the radar van.
The solid-state AZ-EL range indicator generates its
own internal map, sweeps, range marks, and cursors. A
single curser adjustment allows alignment of each
curser with the runway centerline.
Independent transmitters and receivers provide one
operational channel and one “hot standby” channel.
This allows the operator to use one set of equipment,
while a technician performs maintenance on the other
set. Thus, service is never interrupted.
Configuration
A remote control turntable unit and the associated
remote control panels allow positioning of the radar for
multiple runway operation.
Stations not requiring
multiple runway operation use a fixed-mounted
AN/FPN-63.
All radar components are in racks and enclosures of
the radar sets, with empty spaces covered by blank front
panels. The number of indicators varies by site.
Maintenance
Organizational maintenance is performed by ET
personnel (NEC ET-1579) and includes performance
verification, testing, alignment, and fault isolation.
Repair of equipment consists of the replacement of
discrete chassis components and piece parts.
The prime contractor performs all depot-level
maintenance. If you have any modules or PCBs that
your organization cannot repair, return them to the depot
facility.
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