I Optional Hm-75A Functions - Icom IC-4088A Instruction Manual

I 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.
D Switch action
SWITCH
A
B
Change the oper-
UP
ating
number up.
Change the oper-
ating
DOWN
number down.
Lock switch:
Locks all
switches
except [PTT]
NORMAL
Smart-Ring
Open squelch
channel
channel
PTT switch
OFF ON
LOCK
OTHER FUNCTIONS
While holding HM-75A's [PTT]
No function
No function
Smart-Ring
Call-Ring
A
B
Earphone
jack
9
9
21