Specifications - Furuno 1761 MARK-3 Operator's Manual

1. GENERAL
1.1. Indication System
1.2. Range, Pulselength (PL) & Pulse Repetition Rate (PRR)
PL PRR
SP 2100 Hz
MP 1200 Hz
LP 600 Hz
1.3. Range Resolution
1.4. Bearing Discrimination
1.5. Minimum Range
1.6. Bearing Accuracy
1.7. Range Ring Accuracy
2. ANTENNA UNIT
2.1. Radiator
2.2. Polarization
2.3. Antenna Rotation Speed 24 rpm or 48 rpm nominal
2.4. Radiator Length
2.5. Horizontal Beamwidth
2.6. Vertical Beamwidth
2.7. Sidelobe Attenuation
3. TRANSCEIVER MODULE
3.1. Frequency
3.2. Modulation
3.3. Peak Output Power
3.4. Modulator
3.5. Intermediate Frequency 60 MHz
3.6. Tuning
3.7. Receiver Front End
3.8. Bandwidth
3.9. Duplexer
SPECIFICATIONS OF MARINE RADAR
MODEL 1761 MARK-3
PPI Daylight display, raster scan, 8 tones in monochrome
0.125 0.25 0.5 0.75 1.5
0.08 µs
41 m
2.9º
39 m (0.25 NM range)
Within 1º
0.9 % of range or 8 m, whichever is the greater
Slotted waveguide array
Horizontal
100 cm (XN-10A)
2.4°
27°
Within ±20° of main-lobe: less than -24 dB
Outside ±20° of main-lobe: less than -30 dB
9410 MHz ±30MHz (X band)
P0N
4 kW nominal
FET Switching Method
Automatic
MIC (Microwave IC)
Tx pulselength 0.08 µs and 0.3 µs: 7 MHz
Tx pulselength 0.8 µs: 3 MHz
Circulator with diode limiter
Range (nautical miles)
2 3 4 6
0.3 µs
SP - 1
8 12 16 24 36 48
0.8 µs
E3481S01B