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FAR-21x7(-BB)/28x7 SERIES
E3519S01P-M
SP-1
SPECIFICATIONS OF MARINE RADAR/ARPA(TT)
FAR-21x7(-BB)/28x7 SERIES
1. ANTENNA RADIATORS
1. Type Slotted waveguide array
2. Beam width and sidelobe attenuation
X-band S-band
Radiator type
XN5A
XN12AF XN20AF XN24AF SN36AF
Length 10 ft 4 ft 6.5 ft 8 ft 12 ft
Beam width(H) 0.75° 1.8° 1.23° 0.95° 1.8°
Beam width(V) 20° 20° 20° 20° 25°
Sidelobe within ±10° -26 db -24 db -28db -28 db -24 db
Sidelobe outside
±10°
-30 db -30 db -32 db -32 db -30 db
3. Polarization Horizontal
4. Rotation FAR-2117(-BB)/2127(-BB)/2827: 24 rpm or 42 rpm
FAR-2137S(-BB)/2837S: 21 rpm (50 Hz)/26 rpm (60 Hz)/
45 rpm (HSC)
FAR-2827W: 24 rpm
FAR-2837SW: 21 rpm (50 Hz), 26 rpm (60 Hz), 45 rpm (HSC)
5. Wind tolerance Relative wind 100 kt
6. De-icer (option) On: When temperature goes down to +5°C
Off: When temperature goes up to +12°C
2. RF TRANSCEIVER
1. Frequency X-band: 9410 MHz ±30 MHz, S-band: 3050 MHz ±30 MHz
2. Output power FAR-2117(-BB)/2817: 12 kW
FAR-2127(-BB)/2827/2827W: 25 kW
FAR-2137S(-BB)/2837S/2837SW: 30 kW
3. Range, pulse repetition frequency (PRF), pulselength
Range
PRF
Freq
（Hz）
0.125 0.25 0.5 0.75 1 1.5 2 3 4 6 8 12 16 24 32 48 96 120
3000*
0.07µs
3000*
0.15µs
1500
0.3µs
1000
0.5µs
1000
0.7µs
600
(500**)
1.2µs
1, 2, 4, 8, 16, 32, 120 nm ranges not available on IMO radar.
* 32 nm w/TT: 2200 Hz ** For 96 nm
4. Duplexer Ferrite circulator with diode limiter for
FAR-2117(-BB)/2127(-BB)/2137S(-BB)/ 2817/2827/2837S
Ferrite circulator with TR limiter for FAR-2837SW