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FAR-21x7(-BB)/28x7 SERIES
SP - 1 E3519S01G-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
XN4A XN5A
XN12AF XN20AF XN24AF SN30AF SN36AF
Length 8 ft 10 ft 4 ft 6.5 ft 8 ft 10 ft 12 ft
Beam width(H) 0.95° 0.75° 1.8° 1.23° 0.95° 2.3° 1.8°
Beam width(V) 20° 20° 20° 20° 20° 25° 25°
Sidelobe within ±10° -28 db -26 db -24 db -28db -28 db -24 db -24 db
Sidelobe outside ±10°
-32 db -30 db -30 db -32 db -32 db -30 db -30 db
3. Polarization Horizontal
4. Rotation FAR-2117/2117-BB/2127/2127-BB/2827: 24 rpm or 42 rpm
FAR-2157/2157-BB: RSB-106, 18 rpm (50 Hz)/22 rpm (60 Hz),
RSB-107, 22 rpm
FAR-2137S/2137S-BB/2837S: 21 rpm (50 Hz)/26 rpm (60 Hz)/
45 rpm (HSC)
FAR-2167DS/2167DS-BB/2837SW: 21 rpm (50 Hz)/26 rpm (60 Hz)
FAR-2827W: 24 rpm
2. RF TRANSCEIVER
1. Frequency X-band: 9410 MHz ±30 MHz, S-band: 3050 MHz ±30 MHz
2. Output power FAR-2117/2117-BB/2817: 12 kW
FAR-2127/2127-BB/2827/2827W: 25 kW
FAR-2137S/2137S-BB/2837S/2837SW: 30 kW
FAR-2157/2157-BB: 50 kW
FAR-2167DS/2167DS-BB: 60 kW
Unwanted emissions comply with ITU-R RR.
3. Pulselength, PL, PRF and range
X- band 12 kW and 25 kW models
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
#
,
1.5, 2
#
0.5, 0.75,
1
#
, 1.5, 2
#
,
3, 4
#
0.75, 1
#
,
1.5, 2
#
, 3,
4
#
, 6, 8
#
3, 4
#
, 6,
8
#
, 12,
16
#
, 24
3, 4
#
, 6,
8
#
, 12,
16
#
, 24
6, 8
#
, 12,
16
#
, 24,
32
#
, 48,
96, 120
#
*: 2200 Hz with ARPA on, 32 nm range **: 500 Hz on 96 and 120 nm ranges #: Non-IMO type only
X- band 50 kW and S-band 60 kW models
Pulselength S M1 M2 L
PL (µs) 0.08 0.2 0.6 1.2
PRF (Hz) 1900 1100 600 600**
Range scale
(nm)
0.125,
0.25, 0.5,
0.75, 1,
1.5, 2
0.75, 1,
1.5, 2, 3, 4
3, 4, 6, 8,
12, 16, 24
6, 8, 12,
16, 24, 32,
48, 96,
120
**: 500 Hz on 96 and 120 nm ranges
4. IF 60 MHz
5. Noise figure 6 dB (typical)