Uniden UM423 AM Owner's Manual page 7

Getting Started
Button
ANL / NB
CALL / PA
SCAN / MEM
PTT (PUSH-
TO-TALK)
button
(Dual-Watch)
Microphone button functions
Button
88 / DUAL
PTT (PUSH-TO-
TALK)
Press to...
ANL (Automatic Noise Limiter) on/
off
Call tone transmission
Start scanning the channels saved
in memory.
88 / DUAL
button
Press to...
Move up one channel at a time.
Move down one channel at a time.
Go to Channel 88
Temporarily stop scanning and stay
on a channel.
MIC
MIC
88/
DUAL
(move down a channel)
7
Press and hold to...
NB (Noise Blanker) on/off
PA mode on/off
Save a channel into
memory or remove a
channel from memory.
(up) button
(move up a channel)
(down) button
Press and hold to...
Move quickly up the
channels.
Move quickly down the
channels.
Dual Watch mode (see
page 10).
Talk on a channel.