FURUNO
FAR-21x7(-BB)/28x7 SERIES
SP - 1 E3519S01C-M
SPECIFICATIONS OF MARINE RADAR/ARPA
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
XN12AF XN20AF XN24AF SN30AF SN36AF
Length 4 ft 6.5 ft 8 ft 10 ft 12 ft
Beam width(H) 1.8° 1.23° 0.95° 2.3° 1.8°
Beam width(V) 20° 20° 20° 25° 25°
Sidelobe within ±10° -24 db -28db -28 db -24 db -24 db
Sidelobe outside ±10° -30 db -32 db -32 db -30 db -30 db
3. Polarization Horizontal
4. Rotation FAR-2117/2127/2827: 24 rpm or 42 rpm
FAR-2137S/2837S: 21/26 rpm or 45 rpm
FAR-2827W: 24 rpm
FAR-2837SW: 21/26 rpm
2. RF TRANSCEIVER
1. Frequency X-band: 9410 MHz ±30 MHz, S-band: 3050 MHz ±30 MHz
2. Output power FAR-2117/2817: 12 kW FAR-2127/2827/2827W: 25 kW
FAR-2137S/2837S/2837SW: 30 kW
Unwanted emissions comply with ITU-R RR.
3. Pulselength, PL, PRF and range
Pulselength S1 S2 M1 M2 M3 L
PL (µs) 0.07 0.15 0.3 0.5 0.7 1.2
PRF (Hz) 3000* 3000* 1500 1000 1000 600**
Range scale
(nm)
0.125,
0.25, 0.5,
0.75, 1.5
0.5, 0.75,
1.5, 3
0.75, 1.5,
3, 6
3, 6, 12,
24
3, 6, 12,
24
6, 12, 24,
48, 96,
120#
*: 2200 Hz with ARPA on, 32 nm range **: 450 Hz on 96 and 120 nm ranges #: Non-IMO type only
4. IF 60 MHz
5. Noise figure 6 dB (typical)
6. Duplexer Ferrite circulator with diode limiter for
FAR-2117/2127/2137S/2817/2827/2837S
Ferrite circulator with TR limiter for FAR-2827W/2837SW
3. DISPLAY UNIT
1. Screen Yellow or green echoes in 32 levels. Rasterscan non-interlace at
48.3kHz horizontal, 60 Hz vertical. Non-IMO type has yellow or
green monochrome plus 3-color display according to echo strengths.
FAR-21x7 series FAR-28x7 series
Size, model 20.1-inch color LCD, MU-201CR 23.1-inch color LCD, MU-231CR
Display area (mm) 399.36 x 319.49 470.4 x 352.8
Resolution 1280 x 1024 pixels 1280 x 1024 pixels
Effective radar diameter 308 mm 340 mm
2. Minimum range and
range discrimination 35 m
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