For example, there are safety
interlocks on the antenna pedestal, the
receiver/transmitter (R/T) unit, and the azimuth range
indicator. All the other units include ON/OFF switches
and indicator lights.
The AN/SPS-64(V)9 was purchased as the single,
commercially available, off-the-shelf radar for the
Navys Class B1 radar program. Maintenance support,
including documentation, spares, and levels of
maintenance is also an off-the-shelf concept.
Maintenance responsibilities are assigned to an
existing billet and performed by an Electronics
Technician (no specific NEC assigned). Organizational
level maintenance consists of preventive maintenance
(PM) and corrective maintenance (CM). PM is done
according to the maintenance requirement cards
(MRCs). CM consists of (1) adjustments, alignments,
and tests, as described in the technical manual and (2)
replacement of the lowest replaceable unit (LRU)
required to correct radar discrepancies.
The Miniature/Microminiature (2-M) Electronic
Repair Program and the Support and Test Equipment
Engineering Program (STEEP) are not used for the
AN/SPS-64(V)9 radar, since the Navy has no data rights
for the equipment.
Major overhaul and restoration of the
AN/SPS-64(V)9 radar and LRU repair are performed at
the depot level, in the prime contractors facility.
Technical Repair Standards (TRSs) are not available
since the Navy does not make depot-level repairs.
The AN/SPS-55 is a solid-state, Class A surface
search and navigation radar. It is used to detect small
surface targets and for navigation and pilotage. The
AN/SPS-55 radar detects targets from as close as 50
yards to as far as 50 nautical miles. It was specifically
designed for installation in the following
new-construction ship classes:
CGN-38 DDG-993 MCM-1
A radar video converter (RVC) modification was
developed for AN/SPS-55s used on the FFG-61 class.
The AN/SPS-55 radar supports several mission
areas including Antisurface Warfare (ASUW),
Antisubmarine Warfare (ASW), Amphibious Warfare
(AMW), Special Warfare (SPW), Mobility (MOB), and
Command and Control (CAC).
General Theory of Operation
The radar set operates from 9.05 GHz to 10 GHz,
and can tune over the entire bandwidth within 60
seconds. Tuning can be controlled from either the
receiver-transmitter (R/T) unit. The transmitter uses a
magnetron with a minimum peak power of 130 KW.
The receiver can operate in a long-pulse mode (1.0
%sec) or short-pulse mode (.12 %sec) with minimum
ranges of 200 yards and 50 yards respectively. The
antenna consists of two back-to-back end-fed, slotted
waveguide arrays with a scan rate of 16 rotations per
Some special operating features of the AN/SPS-55
radar set include:
Variable sensitivity time control
Fast time constant (FTC)
Log/linear-log intermediate frequency (IF)
Video blanking circuit
Sector radiate capability
Automatic and manual frequency control
The RVC modification provides these additional
Analog/digital (A/D) conversion
Digital integration with beam time interval
Moving window constant false alarm rate
As shown in figure 2-4, the major components of
the AN/SPS-55 radar include the antenna, the