Socket Mobile IC-4088A Optional HM-75A functions, Switch action, PTT switch Lock switch

OTHER FUNCTIONS 9

■Optional HM-75A functions

The optional HM-75A allows remotely selected operating channels, open the squelch, etc. The switches on the HM-75A function as fol- lows.

CAUTION: When connecting the HM-75A to the transceiver,

make sure that power to the transceiver is turned OFF, other- wise the transceiver may malfunction.

DSwitch action

SWITCH	NORMAL		While holding HM-75A’s [PTT]
A	Smart-Ring		No function
B	Open squelch		No function	9
UP	Change the oper-
	ating	channel	Smart-Ring
	number up.
	Change the oper-
DOWN	ating	channel	Call-Ring
	number down.
	PTT switch		B
			A
Lock switch:
Locks all		OFF ON
		LOCK
switches
except [PTT]
			Earphone
			jack

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