AN/SPN-11
Description of the radar set, tactical-technical characteristics
Figure 1: AN/SPN-11
| Specifications | |
|---|---|
| frequency: | 9 320 … 9 430 MHz
( X-Band) |
| pulse repetition time (PRT): | |
| pulse repetition frequency (PRF): | 1 000 Hz |
| pulsewidth (τ): | 0.4 µs |
| receive time: | |
| dead time: | |
| peak power: | 30 kW |
| average power: | 12 W |
| instrumented range: | 20 NM (≙ 37 km) |
| range resolution: | |
| accuracy: | |
| beamwidth: | β=1.9°; ε=20° |
| hits per scan: | |
| antenna rotation: | 17 rpm |
| MTBCF: | |
| MTTR: | |
AN/SPN-11
The Radar Set AN/SPN-11 was an X-Band shipboard navigational aid which provided position data on vessels and landmarks that are not visible because of fog or darkness. The radar was a compact equipment designed for installation aboard small vessels for short range navigational use that utilizes a horn-fed parabolic section reflector antenna. The self-excited transmitter used an air-cooled magnetron of standard 725-A type. It was modulated by a type 4C35 hydrogen thyratron.
The echoe signals are shown on a small PPI-scope with a 7 inch cathode ray tube.
Source:
- Manual Radar Sets AN/SPN-11, Installation and Operation, TM-11-1335, December 1954
- Manual Radar Sets AN/SPN-11, Field maintenance, TM-11-1535, December 1954
- Catalogue of Electronic Equipment,- NavShips 900,116, October 1952