Icom IC-M504 - Manual (Page 20)

14
DUALWATCH/TRI-WATCH
5
■ Description
Dualwatch monitors Channel 16 while you are receiving
on another channel; Tri-watch monitors Channel 16 and the
call channel while receiving another channel. Dualwatch/Tri-
watch is convenient for monitoring Channel 16 when you are
operating on another channel.
■ Operation
q Select Dualwatch or Tri-watch in Set mode. (p. 56)
w Rotate [DIAL] to select the desired operating channel.
e Push [CH/WX•DUAL•U/I/C] for 1 sec. to start Dualwatch
or Tri-watch.
• “D DU UA AL L 1 16 6” appears during Dualwatch; “T TR RI I 1 16 6” appears dur-
ing Tri-watch.
• A beep tone sounds when a signal is received on Channel 16.
r To cancel Dualwatch/Tri-watch, push [CH/WX•DUAL•U/I/C]
again.
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
[Example]: Operating Tri-watch on INT Channel 25
25W 25W INT INT
DUP DUP
TRI TRI 16 16
34 34°34.506N 34.506N
123 123°23.236W 23.236W
UTC UTC 12 12:00 :00 TELEPHONE TELEPHONE
BUSY BUSY 25W 25W INT INT CALL CALL
TAG TAG
TRI TRI 16 16
34 34°34.506N 34.506N
123 123°23.236W 23.236W
UTC UTC 12 12:00 :00 CALLING CALLING
Tri-watch starts. Signal is received on call
channel.
BUSY BUSY 25W 25W INT INT
DUP DUP
TRI TRI 16 16
34 34°34.506N 34.506N
123 123°23.236W 23.236W
UTC UTC 12 12:00 :00 TELEPHONE TELEPHONE
Signal received on Channel
16 takes priority.
25W 25W INT INT
DUP DUP
TRI TRI 16 16
34 34°34.506N 34.506N
123 123°23.236W 23.236W
UTC UTC 12 12:00 :00 TELEPHONE TELEPHONE
Tri-watch resumes after the
signal disappears.