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18 25 kW radar system specifications
NS-RDR1257MO 25 kW scanner
Scanner type Open array
DC input 21.6 V to 31.2 V (DC 24 V systems ONLY)
Scanner dimensions 7.45 ft [2270 mm] (swing circle) by 1.2 ft (H) [356(H) mm]
Scanner weight 119 lb (54 kg) ± 10%
Vibration Amplitude 2 x 13.2 Hz, ± 0.03" [1 mm] ± 10%
Amplitude 13.2 Hz to 100 Hz, gravity acceleration 0.7 m/sec²
Waterproof IPX6
Plane of polarization Horizontal
Preheating time Minimum 3 minutes
Power consumption 180 W (maximum) at maximum wind velocity
Emission type P0N. Passed JRC FCC/IC/R&TTE Type Certification:
FCC ID: CKENKE2252
IC ID: 768C-NKE2252
R&TTE: QQ-RTTE-05/04-02
Peak power output 25 kW ± 50% under any pulse condition
Transmitter frequency 9410 ±30 MHz
Transmitter tube Magnetron NJR Model M1568B(J)
Horizontal beam width 1º ± 10% (-3 dB width)
Vertical beam width 20º ± 20% (-3 dB width)
Side lobe level Below -26 dB maximum (within ± 10º)
Below -30 dB maximum (outside ± 10º)
Rotation rate Approximately 24 rpm (minimum 20 rpm at 70 knot wind
maximum)
Pulse length/PRF 0.07μs ± 30% 2250 Hz ± 5%
0.20μs ± 25% 2250 Hz ± 5%
0.40μs ± 25% 1400 Hz ± 5%
0.80μs ± 25% 750 Hz ± 5%
1.0μs ±25% 650Hz ±5%
1.2μs ±25% 510Hz ±5%
Duplexer Circulator H-6AJRD0001 FCS-68 and diode limiter
Model NJRC NJS6930
Mixer MIC front-end Model Toshiba S-RX24
IF amplifier Center frequency 60 MHz ±3 MHz
IF bandwidth 2 0 MHz ± 3 MHz (0.07μs)
6 MHz ± 2 MHz (0.25μs, 0.40μs)
3 MHz ± 1 MHz (0.8μs, 1.0μs, 1.2μs)
IF characteristic Log
IF output - 2 V for 100 dB typical
Bandwidth controlled by serial port
Com port RS485 9600bps Half Duplex
Defined in NKE-2252 Digital COM specification-
Gain Minimum 90 dB
Noise figure Toshiba S-RX24 @ 6 dB (average) at front-end input
Temperature range -25ºC to +55ºC -25ºF to 131ºF (–15ºC to +55ºC)
Relative humidity 93% at 104ºF (+40ºC)
Relative wind velocity 51.5 m/sec (100 knots)
Sector blank Up to 3
25 kW Radar processor specifications
Radar system NS-RDR1257MO
Northstar 25 kW Radar Installation Manual
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