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3RM-20

Description of the radar set, tactical-technical characteristics

Figure 1: 3RM-20

Figure 1: 3RM-20

Specifications
frequency: 9 345 … 9 405 MHz
(X-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 6; 3; 1.5 or 0.75 kHz
pulsewidth (τ): 0.05; 0.15; 0.5 or 1.5 µs
receive time:
dead time:
peak power: 20 kW
average power: 60 W
instrumented range: 40 NM (≙ 74 km)
range resolution:
accuracy:
beamwidth: 1.2°
hits per scan:
antenna rotation: 25 rpm
MTBCF:
MTTR:

3RM-20

3RM-20 is operating in X-Band navigation and surface warning radar, with some air target capability.

The antenna is a slotted waveguide providing a vertical beam pattern of 26 degrees. The display unit has a nine inch (23 cm) PPI.

A military version with optional a more powerful transmitter is the MM/SPN-703.