Motorola AP 73 User Manual page 26

Additional Operations
Locking / Unlocking the Radio's Function
Locking the radio will disable all buttons except the
Toggle Light / Enter and Parameter Transfer Button (4) ,
Monitor Button (5) , Push-To-Talk (PTT) Button (6) and
. Pressing a locked button will result
shown on the LCD Screen (18) . To lock / unlock the
radio:
• Press and hold
beeps are heard.
The lock / unlock status remains unchanged even
when the power is turned off.
Changing Squelch Modes
Squelch acts as a kind of filtering system which helps
to control the amount of signals the radio receives.
Configuring the radio to receive only the desired sig-
nals minimizes interference from other users of the
same channel.
This radio supports Carrier Squelch (CSQ), Coded
Squelch - Tone Private-Line (PL) , Digital Private-Line
(DPL) and Signalling Squelch - Voice Selective Call
(SelCall) operations on a per channel basis.
Carrier Squelch transmission allows all radios tuned to
the selected receive channel (frequency) to hear the
conversation. Coded Squelch transmission only allows
radio(s) having the same PL / DPL code on the
selected receive channel (frequency) to hear the con-
versation. S ignalling Squelch transmission can only be
decoded by radios equipped with optional DTMF
Decode boards with valid Voice Selective Call (Sel-
Call) identification code (see "Voice Selective Call
(Optional)" on page 44).
18
(for about 2 seconds) until two
NOTE
2-Year Warranty
being