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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
Lock switch:
Locks all
switches
except [PTT]
19
NORMAL
A
Smart-Ring
B
Open squelch
UP
Change the oper-
ating
number up.
DOWN
Change the oper-
ating
number down.
PTT switch
OFF
While holding [PTT]
channel
channel
A
B
ON
LOCK
No function
No function
Smart-Ring
Call-Ring
Earphone
jack
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