Icom IC-446S, Instruction Manual

Page: 24 / 32

8
OTHER FUNCTIONS
19
‘ ‘
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
A
B
UP
DOWN
NORMAL
Smart-Ring
Open squelch
Change the oper-
ating channel
number up.
Change the oper-
ating channel
number down.
While holding [PTT]
No function
No function
Smart-Ring
Call-Ring
A
OFF ON
LOCK
B
Lock switch:
Locks all
switches
except [PTT]
Earphone
jack
PTT switch
IC-446S-(5) 02.3.11 4:18 PM Page 24 (1,1)