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AN/SPN-5

Description of the radar set, tactical-technical characteristics

Figure 1: AN/SPN-5

Figure 1: AN/SPN-5

Specifications
frequency: 9 320 … 9 430 MHz
(X-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 3000 or 750 Hz
pulsewidth (τ): 0.25 or 1 µs
receive time:
dead time:
peak power: 30 kW
average power: 25 W
instrumented range: 40 NM (≙ 74 km)
range resolution:
accuracy:
beamwidth: 1.8°
hits per scan:
antenna rotation: 10 min⁻¹
MTBCF:
MTTR:

AN/SPN-5

AN/SPN-5 is operating in X-Band high resolution radar designed for navigational use aboard small Naval vessels. It is identical to RCA Radiomarine Model CR-101-A.

The antenna is a reflector type constructed of stainless steel made of a number of parabolic-shaped rods. It is about 5 feet wide, 1½ feet high, and 1½ feet deep. The horn radiator provides horizontal polarization.

The transmitter uses a type 725-A magnetron modulated by a type 5D21 tube (Tetrode).

Picture gallery of AN/SPN-5

Figure 2: SPN-5 reflector without horn