User Manual

CONVENTIONAL MODE FEATURES
33
Changing the Priority Channel
If a fixed priority channel is associated with the
current scan list, it can be changed if the Priority
option switch or menu parameter is programmed. With
dual priority, this function changes only the first
priority channel. To change both priority channels, use
the Scan List Edit function described in Section 4.9.1.
Proceed as follows to change the priority channel
using the Priority option switch/menu parameter:
1. Make sure scanning is disabled ( icon not
displayed) and the desired scan list is selected (see
Section 4.9).
2. Select the channel you want to be the priority
channel and then press the Priority option switch or
select that menu parameter. “Priority” is then
flashed to indicate that the current channel is now
the priority channel when scanning that list. Other
indications that may occur are as follows:
• If “No Priority” is displayed, priority sampling
may not be enabled on the scan list.
• If “Sel Chan” is displayed, the priority channel is
always the selected channel and cannot be
changed.
• If no indication displayed, the scan list may not be
user editable or the channel may not be in the scan
list.
5.12 STANDARD CONVENTIONAL CALLS
Standard conventional calls are placed to other
radio units monitoring the selected channel. The
proper coded Call Guard squelch tone or code or P25
NAC may need to be transmitted by your radio for
them to receive a call (see Sections 5.5 and 5.17.3).
Placing a Standard Conventional Call
1. Turn power on and set the volume as described in
Section 3.1. Select the channel programmed for the
radio you want to call as described in Section 3.3.
2. Monitor the channel automatically or manually as
described in Section 5.2.
3. Press the PTT switch and if the Busy Channel
Lockout feature is programmed on the channel (see
Section 5.4), the transmitter is automatically
disabled if the channel is busy. Otherwise, busy and
out-of-range conditions are not indicated.
4. Press (and hold) the PTT switch to talk and release
it to listen.
Receiving a Standard Conventional Call
1. Select or scan the channel programmed for the call
you want to receive (refer to Sections 4.8 and 4.9 for
more scanning information).
2. When the call is received, press the PTT switch to
talk and release it to listen. If scanning, responses
may occur on the priority, selected, or receive
channel as described in Section 5.11.2.
5.13 DTMF/ANI SIGNALING
DTMF (Dual Tone Multi-Frequency) tones can
be generated for ANI (Automatic Number Identifica-
tion) and other purposes on conventional analog
channels. One of the following options may be
enabled on each channel:
Pre-Tx ANI - A preprogrammed ANI sequence is
automatically sent each time the PTT switch is
pressed.
Post-Tx ANI - A preprogrammed ANI sequence is
automatically sent each time the PTT switch is
released.
When an emergency alarm or call is placed, this
ANI signaling is replaced by the Emergency DTMF
ID (see Section 5.10). Refer to Section 5.15 for
information on MDC1200 ANI.
5.14 SINGLE TONE ENCODER
This feature allows the user to transmit a single
tone by pressing the Single Tone Encoder option
switch or selecting that menu parameter. Each conven-
tional system can be programmed for a tone of 500-
2500 Hz in 1 Hz steps with a duration of 0.5-2.5
seconds in 0.1 second steps.