■ Description
Dualwatch monitors Channel 16 while you are receiving an-
other channel; tri-watch monitors Channel 16 and the call
channel while receiving another channel.
■ Operation
q Select the desired operating channel.
w Select dualwatch or tri-watch in set mode. (p. 15)
e Push [DUAL] to start dualwatch or tri-watch.
•“DUAL” appears during dualwatch; “TRI” appears during tri-
watch.
•Beep tone sounds when a signal is received on Channel 16.
•Tri-watch becomes dualwatch when receiving a signal on the call
channel.
r To cancel dualwatch/tri-watch, push [DUAL] again.
[Example]: Operating tri-watch on INT Channel 25.
DUALWATCH/TRI-WATCH SIMULATION
•If a signal is received on Channel 16, dualwatch/tri-watch pauses
on Channel 16 until the signal disappears.
•If a signal is received on the call channel during tri-watch, tri-
watch becomes dualwatch until the signal disappears.
•To transmit on the selected channel during dualwatch/tri-watch,
push and hold [PTT].
Dualwatch Tri-watch
Call channel
DUALWATCH/TRI-WATCH
4
11
INT
25W
DUP
16
TAG
TRI
INT
25W
DUP
16
TAG
TRI
BUSY INT
25W CALL
16
TAG
CALLING
BUSY INT
25W
DUP
16
TAG
CALLING
Tri-watch starts.
Signal is received
on call channel.
Signal received on
Channel 16 takes
priority.
Tri-watch resumes
after the signal
disappears.
01 IC-M503-(1).qxd 01.12.17 5:00 PM Page 11 (1,1)
