20
Antenna
Type End-fed slotted waveguide
Rotation speed 24 to 48 rpm depending on operating mode
Beam width 4 ft model: 1.8°
6 ft model: 1.2°
Beam width vertical 25°
Plane of polarization Horizontal polarization
Side lobe level 4 ft Below -23 dB max (within ±10°)
Below -30 dB max (outside ±10°)
Side lobe level 6 ft Below -23 dB max (within ±10°)
Below -30 dB max (outside ±10°)
Radar
Peak power output 120 W ± 20% under any transmit condition — up to 13% duty cycle max
Transmitter Solid state module with no long-term transmitter power degradation
Transmitter frequency Synthesized:
Set 0: 9.380 - 9.430 GHz
Set 1: 9.360 - 9.480 GHz
Pulse length/PRF and
compression ratio
Pulse duration: 0.04 µsec
Chirp duration: 2÷64 µsec
Chirp bandwidth: 2÷48 MHz
Up to 1 pulse and 2 chirps in a burst with burst repetition rate of 500-3000 Hz — range and
mode dependent.
Eective pulse compression ratio less than 150 in all modes
Instrumented range All antenna sizes: 50 m - 48 nm
SART/RACON triggering Yes — trigger distance: about 3.5 nm max – weather, sea state, and SART position dependent.
Duplexer Circulator and isolator
UNA GaAs front-end
IF section Center frequency: 31.25 MHz
Bandwidth: 50 MHz max A/D; 16 bit 125 MSPS.
¼ Note: Narrower bandwidths are dened by signal processing.
Noise gure 5 dB typical
Compass safe distance Pedestal STD: 1.0 m (3.3 ft)
Steer: 0.5 m (1.6 ft)
RI-50 1.0 m (3.3 ft)
R5000 PSU STD: 1.0 m (3.3 ft)
Steer: 0.3 m (1 ft)
Other
Communication ports Ethernet 10/100 Base-T RJ-45 for radar data and control
Antenna park hold Yes
Motor Brushless with solid state commutation and electromagnetic braking for parking
Interconnecting cable Dual cable (power and LAN) 30 m (98 ft) or 65 m (213 ft)
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