Furuno FR-1710 User Manual
Page 73
SP - 2
(6) Range, Pulselength (PL) & Pulse Repetition Rate (PRR)
FR-1710/1725:
Range (nm)
PL
PRR (Hz)
0.125
0.25
0.5
0.75
1.5
3
6
12
24
48
72
96
S1P
3000
0.07
µ
s
S2P
3000
0.15
µ
s
M1P 1500
0.3
µ
s
M2P 1000
0.5
µ
s
M3P 1000
0.7
µ
s
LP
600
1.2
µ
s
*: Second echo trace mode PRR; 500 Hz
Maximum Range: FR-1710: 72 nm, FR-1725: 96 nm
FR-1760DS:
Range (nm)
PL
PRR (Hz)
0.125
0.25
0.5
0.75
1.5
3
6
12
24
48
72
96
120
SP
1900
0.08
µ
s
M1P 1100
0.3
µ
s
M2P 600
0.6
µ
s
LP
600
*
1.2
µ
s
*: 450 Hz on 120 nm range
(7) Duplexer
Ferrite circulator with diode limiter
(8) Noise figure
FR-1710/1725: 6 dB, FR-1760DS: 4dB
3. RADAR DISPLAY
(1) Picture tube
17" color CRT, Effective display diameter: 225 mm
Yellow or green echoes in 16 levels
(2) Scanning
Raster scan at scanning frequency 48.3 kHz horizontal, 60 Hz vertical.
Number of scanning lines 768, non-interlaced.
(3) Range scales and ring intervals
Range(nm)
0.125
0.25
0.5
0.75
1.5
3
6
12
24
48
72
96 120
Ring interval(nm)
0.025
0.05
0.1
0.25 0.25 0.5
1
2
4
8
12
16
20
No. of Rings
5
5
5
3
6
6
6
6
6
6
6
6
6
Maximum Range: FR-1710: 72 nm, FR-1725: 96 nm, FR-1760DS: 120 nm
(4) Range discrimination
34 m on 1.5 nm range
(5) Bearing discrimination
XN12AF: 2.03°, XN20AF: 1.46°, XN24AF: 1.18°
SN4A: 2.83°, SN5A: 2.53°
(6) Minimum range
28 m