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CONVENTIONAL FEATURES
51
A CG (Call Guard disable) option switch may also be programmed.
This switch disables both receive and transmit squelch control on the
selected group only (the monitor mode disables only receive squelch
control). When squelch control is disabled by the CG switch, “CG OFF”
is momentarily displayed. To re-enable squelch control and momentarily
display “CG ON”, press the CG switch again, select another system/
group, or cycle transceiver power.
If the Transmit Disable On Busy feature is used (see description
which follows), monitoring is performed automatically and the monitor
mode may not need to be used. Refer to “Monitoring Conventional Chan-
nels Before Transmitting” on page 42 for more information.
Transmit Disable On Busy
The Transmit Disable On Busy feature automatically disables the
transmitter if the selected group (channel) is busy when the PTT switch is
pressed. When the transmitter is disabled by this feature, the busy tone
sounds briefly and “DSBL BSY” is indicated on the lower line of the
display. The monitor mode (see preceding section) is enabled while the
PTT switch is pressed so that activity on the channel can be monitored.
However, it is not possible to access a channel by holding down the PTT
switch (it must be released to make another attempt).
Occasionally, a busy condition may be detected even though no one
is talking. To key the transmitter in this case, release the PTT switch and
then immediately press it again. There is also a programmable option
with this feature to allow transmitting with a busy channel if the correct
Call Guard signal is detected. The Transmit Disable On Busy feature is
enabled or disabled on each conventional group by dealer programming.
Receive-Only Groups
Conventional groups can be programmed for monitoring only (trans-
mitting is disabled). If the PTT switch is pressed with one of these groups
selected, the intercept tone sounds and “TX DSBL” is displayed.