Advanced Features
English
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Using the Conventional Squelch Operation
Features
This feature filters out unwanted calls with low signal strength or
channels that have a higher than normal background noise.
Analog Options
Tone Private Line (PL), Digital Private-Line (DPL), and carrier
squelch can be available (preprogrammed) per channel.
Digital Options
One or more of the following options may be preprogrammed in
your radio. Check with your dealer or system administrator for
more information.
Using the Digital PTT ID Feature‡
This feature allows you to see the radio ID (number) of the radio
from whom you are currently receiving a transmission. This ID,
consisting up to a maximum of eight characters, can be viewed
by both the receiving radio and your dispatcher.
Your radio’s ID number is also automatically sent every time the
PTT button is pressed. This is a per-channel feature. For digital
voice transmissions, your radio’s ID is sent continuously during
the voice message.
Using the Smart PTT Feature (Conventional Only)
Smart PTT is a per-personality, programmable feature used in
conventional radio systems to keep your radio from talking over
other radio conversations.
When smart PTT is enabled in your radio, you cannot transmit
on an active channel.
If you try to transmit on an active smart-PTT channel, you hear
an alert tone, and the transmission is inhibited. The LED lights
up solid yellow to indicate that the channel is busy.
Mode Result
Carrier squelch (C) You hear all traffic on a channel.
PL or DPL
Your radio responds only to your
messages.
Option Result
Digital Carrier-Operated
Squelch (COS)
You hear any digital traffic.
Normal Squelch
You hear any digital traffic having
the correct network access code.
Selective Switch
You hear any digital traffic having
the correct network access code
and correct talkgroup.
Option Result
APX_3000_M1.book Page 56 Wednesday, October 17, 2012 12:56 PM
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