Furuno FR-1710 manual Radar Display

(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 μs
S2P	3000				0.15 μs
M1P	1500					0.3 μs
M2P	1000							0.5 μs
M3P	1000							0.7 μs
LP	600									1.2 μs

*: 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 μs
M1P	1100					0.3 μs
M2P	600							0.6 μs
LP	600*										1.2 μs

	*: 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

SP - 2