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An Alert Tone sounds when the received Option
Signalling matches the Signalling programmed in the
transceiver.
Refer to "6.3 DTMF Decode" for details.
You can use QT/DQT and DTMF at the same time.
Refer to each section for details.
2.1.9 SP Unmute
This function allows you to program the transceiver
so it will unmute the speaker upon the correct match.
Carrier
The transceiver unmutes when receiving signal is
a carrier; also known as carrier squelch.
You can select Carrier only when the QT/DQT
Decode is set to "None."
QT/DQT
The transceiver's speaker umutes when the
receive signal's QT/DQT code matches the
QT/DQT code programmed for the Channel.
You can select QT/DQT only when the QT/DQT
Decode is not set to "None".
Carrier + DTMF
The transceiver's speaker umutes when the
receive signal matches carrier and the DTMF
Signalling.
You can select Carrier + DTMF only when the
QT/DQT Decode is set to "None" and the Option
Signalling is set to "DTMF".
QT/DQT + DTMF
The transceiver's speaker umutes when the
receive signal's QT/DQT code and the DTMF
Signalling match.
You can select QT/DQT + DTMF only when the
QT/DQT Decode is not set to "None" and the
Option Signalling is set to "DTMF".
2.1.10 Busy Channel Lockout
If the user transmits on a channel while other groups
are using that channel, the user may interfere with
communications. The Busy Channel Lockout function
prevents such interference.
In Systems where this function is not activated, the
user must monitor the Channel using the Monitor
function before transmitting.
This function prevents the user from interfering with
other users without having to first monitor the
Channel status.
There are three methods to inhibit transmission:
"Carrier", "QT/DQT" and "DTMF".
You can transmit when the transceiver does not have
a Carrier present on the channel.
Carrier
The transceiver does not transmit as long as it
receives a Carrier.
QT/DQT
The transceiver does not transmit when the
received QT/DQT code does not match the
QT/DQT code programmed for the Channel.
The transceiver does not transmit when receiving
only a Carrier.
DTMF
The transceiver may not transmit unless the
received DTMF code matches the DTMF code
programmed in Option Signalling. The transceiver
may start to transmit as soon as the received
DTMF code matches the DTMF code
programmed in Option Signalling.
2.1.11 Beat Shift
This function eliminates problems of the receiver's
internal beat caused by internal oscillators.
The harmonic of the oscillator in the microprocessor
may interfere with reception. You can prevent this
problem by slightly shifting the frequency of the
oscillator.
2.1.12 Scan Add
This function adds a Channel to the Scan list.
The transceiver monitors only channels that have
been added to scan list.
2.1.13 Priority Channel
The transceiver can scan a programmed Priority
Channel. You can program the Priority Channel for
2 Channel Information
7
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