Icom IC-4008E instruction manual ‘ Optional HM-75A functions, Switch Normal

8 OTHER FUNCTIONS

‘Optional HM-75A functions

The optional HM-75A allows you to remotely select operating chan- nels, open the squelch, etc. The switches on the HM-75A function as follows.

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.

SWITCH	NORMAL		While holding [PTT]
A	Smart-Ring		No function
B	Open squelch		No function
UP	Change the oper-
	ating	channel	Smart-Ring
	number up.
DOWN	Change the oper-
	ating	channel	Call-Ring
	number down.

PTT switch			A
			B
Lock switch:
Locks all	OFF	ON
		LOCK
switches
except [PTT]

Earphone

jack

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