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AN/SPN-11

Description of the radar set, tactical-technical characteristics Описание; Основные тактико-технические характеристики (Базы данных)

Figure 1: AN/SPN-11

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.

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