Furuno FS-1562-15, FS-1562-25 manual

9951	Scan/sweep-stop signal level
	When the receiver detects a signal whose level is stronger than the preset level
	it stops scanning and receives the signal. The setting on system code 9955 is
	available only when “0” (SQ working condition) is selected here.
	Setting range: 0 (Squelch working condition is effective as set on code 9995),
	1-10 (S-meter level); Factory setting 3
9952	Scan/sweep-stop time
	When a signal is detected, the receiver stops scanning/sweeping and dwells on
	this channel frequency. When “0” (RX) is selected, the receiver keeps receiving
	until the traffic goes out of this channel frequency. Define the dwell time
	between 1 and 99 s.
	Setting range: 0 (RX), 1-99 s; Factory setting 2
9953	Sweep width setting range: 0.01-30000.00 kHz; Factory setting 100.0
9954	Sweep step frequency
	Setting range: 0.01-30000.00 kHz; Factory setting 1.00
9955	Squelch activation
	“Squelch activation” is the method by which the squelch is activated.
	Setting range: 0, 1, 2, 3; Factory setting: 3.
	0: Voice
	The squelch is opened by signal frequency less than 1000 Hz (factory setting).
	This frequency can be changed between 500 - 2000 Hz on system code 9958.
	The loudspeaker reproduces a sound when the signal is lower than the preset
	frequency.
	Squelch OPEN:
	Audio signal is detected and a sound is reproduced through the loudspeaker.
	Squelch CLOSED:
	No input signal but only noise is coming into the receiver. The receiver is
	muted.
	1: Level
	The squelch is activated depending on “signal strength”. The factory setting is
	“5”. You can change the level between 0 - 10 on system code 9956.
	2: And
	The squelch opens when both “voice” and “signal strength” meet the setting.
	3: Or
	The squelch opens by either “voice” or “signal strength”, whichever meets the
	setting.
9956	Squelch level. Setting range: 0-10; Factory setting 5.
9957	Squelch delay - a delay until the squelch mutes (closes) the receiver after the
	signal has gone.

(Ex) 9957: 1000 ms

Squelch closes 1000 ms after the signal has gone.

Setting range: 500-4000 ms; Factory setting 1000 ms.

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