15 December 1965
ITEM NAME: INDICATOR GROUP
Bearing Accuracy: Within 2 deg at all antenna
synchro voltages and the ability to display AN/SPS-32
radar video and IFF target responses. The mode of
Cathode-Ray Tube Diameter (PPI): 10-1/2 in.
operation of the indicator group is chosen by a RADAR
Number of Operators Required: 1
SELECTOR switch mounted on the front panel.
RELATION TO SIMILAR EQUIPMENT
Siting: Azimuth-Range Indicator IP-538/ SPA-51 and
Indicator Group AN/SPA-51 is essentially the same
Electrical Standarized Components Case CY-
as Indicator Group AN/SPA-33 except that AN/SPS-32
1864/SPA-BC; Combat Information Center.
radar video (and IFF target responses) can also be
Power Supply PP-560D/SP; where convenient, up
displayed by selecting positions 4 or 10 of the RADAR
to 150 feet (maximum cable length) from the
Other differences are:
extension of range from 300 to 400 miles, deletion of
convenient, up to 60 feet (maximum cable length)
external cursor bearing information transfer, elimination
from the power supply. Electronic Gate TD-
of the range and bearing buzzer, and the display of
326/SP; where convenient, up to 75 feet
AN/SPS-26 radar in positions 2, 3, or 9 of the RADAR
(maximum cable length) from the indicator and
the power supply.
Mounting: All units except Electrical Standardized
Pulse Repetition Frequency: 60 to 3000 per sec
Components Case CY-1864/SPA-BC are shock
Power Requirements: 115v plus or minus 10%; 60
mounted and bolted into place.
cycles plus or minus 3 cycles, single ph
Mounting Dimensions: length by width by depth.
Power Demand: 1847 va
Azimuth Range Indicator
IP-538/SPA-51: 63 in. 41 in. 45 in.
Power Factor: 0.93 pf (approx)
Power Supply PP-56OD/SP: 40 in. 28 in. 31 in.
Video Input: 1 to 2-1/2v (pos)
Trigger Input: 5 to 50v (pos)
Antenna and Trace Rotation: 0 to 40 rpm
Electronic Gate TD-326/SP: 41 in. 15 in. 16 in.
Components Case CY-1864/SPA-BC: 16 in. 19
Centered PPI: 4 to 400 mi continuously var
in. 16 in.
Off-Centered PPI: 4 to 400 mi continuously var
Related Equipment: (Required, but not Supplied)
Video Decoder KY-80/UPA-24, Radar Set Control
300 to 10,000 Yards: plus or minus 100 yds
C-1008/UPA-24, 5G synchro, 6G synchro
10,000 to 72,000 Yards: plus or minus 1% of
interconnecting cables, and terminal tubes.
72,000 Yards to 400 Miles: plus or minus 2% of
PRINCIPAL COMPONENTS AND PHYSICAL DATA
Azimuth-Range Indicator IP-53B/SPA-51
35 x 39-1/2 x 46-3/4
Power Supply PP-560D/SP
33 x 27-1/2 x 36-3/4
Power Transformer TF-129A/SP
30-3/4 x 17-1/2 x 10-3/4
Electrical Standardized Components Case
21-5/8 x 20-1/8 x 18-1/8
Electronic Gate TD-326/SP