Furuno FR-8251 Marine RADAR User Manual


 
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SPECIFICATIONS
Antenna Unit
Type Slotted waveguide array
Polarization Horizontal
Length 4 ft(XN2) 6.5 ft(XN3) 6.5 ft (XN3A) 8 ft(XN4A)
Beamwidth 1.8 x 25° 1.2 x 25° 1.23 x 20° 0.9 x 20°
Rotation speed 24 rpm (36 rpm optional)
Transceiver Module
Frequency 9410 MHz ± 30 MHz (X-band)
Peak output power FR- 8051: 6 kW
FR- 8111: 10 kW
FR- 8251: 25 kW
Transmitting tube FR- 8051: MAF1422B
FR- 8111: MAF1425B
FR- 8251: 9M752 or M5187F
Pulselength (PL) & Pulse Repetition Rate (PRR)
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LPRRP 521.052.05.057.05.1362142842769
PSzH0012sdnocesorcim80.0
1PMzH0012sdnocesorcim3.0
2PMzH0021sdnocesorcim6.0
PL*zH006sdnocesorcim2.1
egnarmn69,27nozH005*
)ylnoPL,2PM,1PM(ffosinoitcejerohceecartdn2nehwzH005
Modulator FR-8051/8111: FET switching method
FR-8251: Line Pulse
I/F amplifier Logarithmic, IF 60 MHz
Bandwidth: 25MHz (0.08 µs), 2.5 MHz (0.3 µs, 0.6 µs, 1.2 µs)
Tuning Automatic or manual
Receiver front end MIC (Microwave IC)
Duplexer Circulator with diode limiter