Furuno 1942 - Manual (Page 6)

v
monochrome CRT
3. Range scale (nm):
Range, Range interval and no. of Rings:
0.125 (0.0625, 2), 0.25 (0.125, 4), 0.75
(0.25, 3), 1 (0.25, 4), 1.5 (0.5, 3), 2 (0.5, 4),
3 (1, 3), 4 (1, 4), 6 (2, 3), 8 (2, 4), 12 (3, 4),
16 (4, 4), 24 (6, 4), 36 (12, 3)
4. Bearing resolution: 4
°
5. Bearing accuracy: Within 1
°
6. Range discrimination: Better than 20 m
7. Range ring accuracy:
0.9 % or range in use or 8 m, whichever is
larger
8. Minimum range: Better than 25 m
9. Markers:
Heading line, Bearing scale, Range ring,
VRM 1/2, EBL 1/2, Tuning indicator,
Cursor, Alarm zone, North mark (heading
sensor input required)
10. Alphanumeric indication:
Range, Range ring interval, Pulselength (SP,
MP, LP), Display mode (HU, CU, NU, TM),
Interference rejection (IR1, IR2, IR3), VRM
(1,2), EBL (1, 2), Automatic A/C SEA (A/C
AUTO), Stand-by (ST-BY), Radar alarm:
G(IN)/G(OUT)/G(ACKN), Echo stretch
(ES1, ES2), Range to cursor, Bearing to
cursor, Echo trailing (TRAIL), Trail time,
Trail elapsed time, Navigation data (naviga-
tion input required), heading (HDG, heading
sensor input required)
11. Vibration:
Vibration Total amplitude
5 to 12.5 Hz
±
1.6 mm
12 to 25 Hz
±
0.35 mm
25 to 50 Hz
±
0.10 mm
12. Temperature:
Antenna unit; -25
°
C to + 70
°
C
Display unit; -15
°
C to + 55
°
C
13. Humidity:
Relative humidity 93% or less at + 40
°
C
14. Waterproofing: Antenna unit;
IPX6
Display unit;
IPX5
15. Power supply & power consumption:
12 V, 24 V or 32 VDC (10.2 V to 41.6 VDC)
50W
16. Protection feature:
Protection against reverse polarity, overvolt-
age, overcurrent, and internal fault
17. Compass safe distance:
MODEL 1832
SPECIFICATIONS
ANTENNA UNIT
1. Radiator: Printed array
2. Radiator length: 60 cm
3. Horizontal beamwidth: 3.9
°
4. Vertical beamwidth: 20
°
5. Sidelobe:
Within
±
20
°
of mainlobe; less than -18 dB
Outside
±
20
°
of mainlobe; less than -23 dB
6. Polarization: Horizontal
7. Antenna rotation speed: 24 rpm
8. Wind resistance:
Relative wind speed 100 knots (51.5 m/s)
TRANSCEIVER MODULE
(contained in radome)
1. Transmitting tube: MG5248, E3571 or
MAF1421B
2. Frequency:
9410 MHz
±
30 MHz
3. Peak output power: 4 kW nominal
4. Pulselength & pulse repetition rate:
0.08
µ
s, 2100 Hz (0.125, 0.25, 0.5, 0.75, 1.5)
0.3
µ
s, 1200 Hz (1.5, 2, 3)
0.8
µ
s, 600Hz (3, 4, 6, 8, 12, 16, 24, 36)
5. Warmup time: 1:30
6. Modulator: FET switching
method
7. I.F.: 60 MHz
8. Tuning: 3Automatic or
manual
9. Receiver front end:
MIC (Microwave
IC)
10. Bandwidth:
Tx pulselength 0.3
µ
s and 0.08
µ
s: 25 MHz
Tx pulselength 0.8
µ
s: 3 MHz
11. Duplexer: Circulator with diode
limiter
DISPLAY UNIT
1. Indication system: PPI raster scan
2. Display: 10-inch rectangular