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10
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.
D Switch action
SWITCH
A
B
UP
DOWN
22
NORMAL
Smart-Ring
Open squelch
Change the oper-
ating
channel
number up.
Change the oper-
ating
channel
number down.
PTT switch
Lock switch:
Locks all
switches
except [PTT]
While holding [PTT]
No function
No function
Smart-Ring
OFF
ON
LOCK
Call-Ring
A
B
Earphone
jack
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