User's Manual

CONVENTIONAL FEATURES

Busy Channel Lockout

The Busy Channel Lockout feature (also called Transmit Disable On

Busy) automatically disables the transmitter if the channel is busy when

the PTT switch is pressed. When the transmitter is disabled by this

feature, “BUSY” is displayed and a tone sounds. This feature is

programmed to operate for one of the following modes:

Off - The feature is disabled and the transmitter keys even if the channel

is busy.

Noise - The transmitter is disabled if any signal is detected on the

channel.

Tone - The transmitter is disabled if the detected squelch coding is not

correct.

If busy channel override is enabled by programming, it is possible to

transmit when the transmitter is disabled by this feature. Simply release

the PTT switch and then quickly press it again.

Call Guard Squelch

General

Call Guard

squelch (also called CTCSS/DCS or selective

signaling) may be programmed on conventional channels. This feature

eliminates distracting messages intended for others using the channel.

This is accomplished by using a subaudible tone or digital code to control

the squelch. This tone or code is unique to a user or talk group on that

channel. It is transmitted by the mobile placing a call, and if Call Guard

squelch is programmed in the mobile receiving the call, it must detect the

correct tone or code to receive the call.

Call Guard Squelch Enable/Disable

The SEL SQ option switch (if available) can be used to temporarily

disable receive Call Guard squelch on the current channel. When it is

disabled, “NORMAL” is flashed in the display, and when it is enabled,

“SELECTIVE” is flashed. It is automatically re-enabled when another