TM 11-5840-360-14-1-1
The 12-inch azimuth range indicator IP-1282
Table 1-2 Radar Set AN/SPS-64 (V) 1
contains the cathode ray tube (CRT) and all digital and
Equipment Required But Not Supplied
analog circuits necessary for the CRT presentation and
control of the radar. All operating controls are located
on the front panel and positioned to facilitate adjustment
Cable
Waveguide
Type
during day or night use.
The Receiver Transmitter RT-1240, which is
X
TSGA-3
designed for bulkhead mounting, contains the
X
TSGA-4
modulator, transmitter and receiver circuits, mounted in
X
MSCA-7
a single case.
X
Belden 8286 or Belden 9253
X
Belden 9775
1.6.1 Equipment Supplied (V1)
X
FSGA-9
X
RG-67/U
Set AN/SPS-64(V) 1.
X
RG-68/U
1.6.2 Equipment Required But Not Supplied (V1)
The echoes displayed on the screen depend on the
size, shape, material, and position of the objects.
supplied for Radar Set AN/SPS-64(V) 1.
Practice in good visibility is helpful in interpretation of
the radar display. The performance of all marine radars
1.6.3 Block Diagram Description (V1)
is affected by unwanted echoes (clutter) such as those
produced by rain and waves, which obscure signals from
basic functions of the radar. The transmit pulse is
valid echoes.
Operating controls are included to
generated by the transmitter section of the receiver-
minimize the effect of clutter.
transmitter and radiated outward from the ship in a
The power modules in the indicator and receiver
narrow beam by the antenna. As the antenna rotates,
transmitter convert the ship's input power to the supply
the beam scans the surrounding surface in all directions.
voltages and frequencies required. Power for the
Any object scanned by the antenna reflects a portion of
antenna rotation motor is routed through the receiver
the radiated signal back to the antenna.
transmitter.
A duplexer circuit couples the transmitter section or
the receiver section to the antenna to permit a single
1.6.4 Performance Characteristics (V1)
antenna to be used for transmission and reception. The
Performance characteristics for the receiver
signal reflected from an object is received by the
transmitter, RT-1240, are specified in paragraph 1.11.2
antenna and processed through the duplexer to the
while the same data for the antenna and azimuth range
mixer and IF amplifier. Detected echoes are displayed
indicators are found under paragraphs 1.12.2 and 1.13.2
on the CRT screen of the indicator.
respectively.
A faint line of light, or trace, rotates around the
center of the display continuously, in step with the
1.6.5 Required Test Equipment and Tools (V1)
antenna rotation. As the trace rotates, processed and
Required test equipment and tools are specified in
synchronized video appears on the trace to display a
complete radar picture of the surrounding area with
every rotation of the trace. The processed video
1.6.6 Shipboard Spares
technique utilized in the radar provides a brighter picture
Shipboard spares are specified in Table 1-4. This
on the shorter ranges than that available with a
same information applies for the V2 and V3 systems.
conventional display.
Table 1-1 Radar Set AN/SPS-64(V) 1 Equipment Supplied
Qty.
Model
Description
Product Code
1
RT-1240/SPS-64 (V)
Receiver Transmitter,
M27550
1
AS-3194/SPS-64(V)
Antenna
M27409
1
AB-1247/SPS-64(V)
Antenna Pedestal
M27575
1
IP-1282/SPS-64(V)
Azimuth Range Indicator
M27501
1-6
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