Type 978
Description of the radar set, tactical-technical characteristics
Figure 1: Antenna ATZ of Type 978 radar
| Specifications | |
|---|---|
| frequency: | 9 410 MHz
(X-Band) |
| pulse repetition time (PRT): | |
| pulse repetition frequency (PRF): | 1 000 or 2 000 Hz |
| pulsewidth (τ): | 1 µs or 0.2 µs |
| receiving time: | |
| dead time: | |
| peak power: | |
| average power: | |
| instrumented range: | 40 NM (≙ 74 km) |
| range resolution: | < 46 m |
| accuracy: | 2% |
| beamwidth: | |
| hits per scan: | |
| antenna rotation: | 20 or 24 min⁻¹ |
| MTBCF: | |
| MTTR: | |
Type 978
Type 978 was operating in X-Band surface warning and navigation radar for British destroyers and frigates. This radar replaced the earlier Type 277Q. Later it was also replaced by Type 1006.
The antenna ATZ is a 6 feet wide double-cheese, the upper for transmission, the lower for reception. The speed of rotation depends on the feed with either 50 or 60 Hz mains voltage.