3RM-20
Description of the radar set, tactical-technical characteristics
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 |
| receiving 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 the 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. A version built under license by Dynell Electronics Corp. in the USA is designated AN/SPS-63 there.