Furuno FR-1710 Operator's Manual page 73

(6) Range, Pulselength (PL) & Pulse Repetition Rate (PRR)
FR-1710/1725:
PL PRR (Hz)
S1P 3000
S2P 3000
M1P 1500
M2P 1000
M3P 1000
LP 600
*: Second echo trace mode PRR; 500 Hz
Maximum Range: FR-1710: 72 nm, FR-1725: 96 nm
FR-1760DS:
PL PRR (Hz)
SP 1900
M1P 1100
M2P 600
*
LP 600
*: 450 Hz on 120 nm range
(7) Duplexer
(8) Noise figure
3. RADAR DISPLAY
(1) Picture tube
(2) Scanning
(3) Range scales and ring intervals
Range(nm)
Ring interval(nm)
No. of Rings
Maximum Range: FR-1710: 72 nm, FR-1725: 96 nm, FR-1760DS: 120 nm
(4) Range discrimination
(5) Bearing discrimination
(6) Minimum range
0.125 0.25 0.5 0.75
0.07 s
0.125 0.25 0.5 0.75
0.08 s
Ferrite circulator with diode limiter
FR-1710/1725: 6 dB, FR-1760DS: 4dB
17" color CRT, Effective display diameter: 225 mm
Yellow or green echoes in 16 levels
Raster scan at scanning frequency 48.3 kHz horizontal, 60 Hz vertical.
Number of scanning lines 768, non-interlaced.
0.125 0.25 0.5 0.75
0.025 0.05 0.1 0.25 0.25 0.5
5 5 5
34 m on 1.5 nm range
XN12AF: 2.03°, XN20AF: 1.46°, XN24AF: 1.18°
SN4A: 2.83°, SN5A: 2.53°
28 m
Range (nm)
1.5 3 6 12
0.15 s
0.3 s
0.5 s
0.7 s
Range (nm)
1.5 3 6 12
0.3 s
0.6 s
1.5 3 6 12
1 2
3 6 6 6 6
SP - 2
24 48 72 96
1.2 s
24 48 72 96 120
1.2 s
24 48 72 96 120
4 8 12 16 20
6 6 6 6 6