Furuno FR-2155, Service Manual

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1-4
1.3 Specifications
SCANNER UNIT
ITEM FR-2155
Radiator Type Slotted Waveguide Array
Radiator Length 8 ft (XN-4A), 10 ft (XN5A)
Horizontal Beamwidth 0.95 deg. (XN4A), 0.75 deg.(XN5A)
Vertical Beamwidth 20 deg. (XN4A, XN5A)
10 deg. to –10 deg.
of mainlobe
–28dB or less (XN4A, XN5A)
Sidelobe
Attenuation
O10 deg. to –10
deg. of mainlobe
–32dB or less (XN4A, XN5A)
Polarization Horizontal
Antenna Rotation
approx. 20 rpm (3
∅
60 Hz / DC)
approx. 16 rpm (3
∅
50 Hz)
Scanner Housing Structure Open Radiator
Standard 1.65 m
Compass Safe
Distance
Steering 1.25 m
TRANSCEIVER
ITEM FR-2155
Magnetron M-4505 E
Frequency &
Modulation
9385 MHz to 9445 MHz, P0N (X band)
Peak Output Power 50 kW
0.08 µs, approx. 2200 Hz (S1 : 0.125 nm to 3 nm)
0.2 µs, approx. 1100 Hz (M1 : 0.75 nm to 6 nm)
0.6 µs, approx. 600 Hz (M2 : 3 nm to 24 nm)
Pulselength & Pulse
Repetition Rate
1.2 µs, approx. 600 Hz (M3 : 6 nm to 120 nm)
Modulator SCR Switc
Duplexer Circulator with diode limiter
Tuning Automatic or Manual
Intermediate Frequency 60 MHz
Bandwidth
25 MHz (0.08 µs, 0.2 µs), 3 MHz (0.6 µ,, 1.2 µ)