8
the radio will stop transmitting.
4.1.8 Monitoring
When receiving a signal which doesn't matches the signaling, the
mute circuit will prevent the speaker from producing any sound.
Press the MONI key to cut off the squelch control circuit, and you
will hear noise from speaker (no mater whether there are signals).
Such operation is very useful when you want to adjust voice volume
or receive weak signals (to avoid voice intermittence when in weak
signals). When you press the MONI key, the green indicator lights,
and the radio is in the state of monitoring.
4.1.9 Busy Channel Lockout
If busy channel lockout has been activated, transmitting signals is
prohibited on the busy channel. If you press the PTT to transmit on
the busy channel, the speaker will sound busy channel lockout
tone, and you cannot transmit signals.
Options:
Carrier wave: If there's carrier wave in the channel, transmitting
is prohibited.
Carrier wave + QT/DQT: If there's carrier wave in the channel
while the QT/DQT matches, transmitting is allowed.
4.1.10 2TONE Signaling
The dealer may set this function at enabled or disabled by
programming.
2 Tone Decoding
When the radio receives correct 2-tone signals, it will operate
according to the decoding call response set by the dealer, when the
orange LED will flash and sound the decoding tone you selected.
2 Tone Encoding
When you press the programmable keys programmed at Call1 ,
Call2 , Call3 or Call4 , and the keys are provided with
corresponding 2 tone signaling sequence, 2-tone signaling will be
transmitted. This function should be set by the dealer by
programming.
Or you can select the 2-tone signaling sequence you want to call
from the call list and press PTT twice to transmit 2-tone sequences.
4.1.11 DTMF Signaling
The dealer may set this function at enabled or disabled by
programming.
DTMF Decoding
After the radio receives the correct DTMF signaling, it will operate
the according to the decoding call response set by the dealer. The
orange LED will flash and transmit the decoding tone you selected.
DTMF Encoding
When you press the programmable keys programmed at Call1 ,
Call2 , Call3 or Call4 , and the keys are provided with
corresponding DTMF signaling sequence, DTMF signaling will be
transmitted. This function should be set by the dealer by
programming.
Or you can select the DTMF signaling sequence you want to call
from the call list and press PTT twice to transmit DTMF sequences.
4.1.12 Call list
The 2-tone list and DTMF list being set will be automatically added
to the call list. Enter the Call list menu by menu operation and
select the sequence you want to call and press PTT for calling.
PT6500 SERVICE MANUAL
knob.
Selected + current channel: The channel for holding call when
receiving signals or the channel selected by the channel selection
knob.
Priority 1 + current channel: The channel for Priority channel 1
or for holding call when receiving signals.
Priority 2 + current channel: The channel for Priority channel 2
or for holding call when receiving signals..
Priority channel 1
Priority channel 2
Priority channels can be set at Fixed or Selected .
4.1.4 Sub-audio (QT) and Digital Sub-Audio (DQT)
The dealer may have programmed QT or DQT signals in channels
of the radio, which may ignore calls from other irrelevant stations in
the same channel. If a certain channel is provided with QT or DQT
signals, only when the correct QT or DQT signals are received can
the squelch be activated. Similarly, only when the QT/DQT signals
are in accordance with your radio can the signals you transmitted by
heard.
4.1.5 TOT Transmitting Time Limit
a.
warning tone, and
2. The
4.1.6 Auto Power Saving
The dealer can set the power-saving mode of the battery by
programming.
If this function is enabled, 10 seconds after no signal is received or
no operation is carried out, the radio will be in the power-saving
mode. When any signal is received or any operation is carried out,
the radio can automatically quit this mode.
Power-saving modes: 1: 1, 1: 2, 1: 4 and off.
Setting the power-saving function of a battery can reduce the power
consumption of the battery.
4.1.7 Low Power Warning
When the battery power appears low, the indicator flashes. If the
battery power is lower than the preset value during transmitting, the
status indicator flashes red. When the speaker sounds warning tone,
.
countdown will go on if the time after releasing the PTT key
is shorter than the reset time.
TOT timer:
1. Time-out timer can prevent any caller from occupying one certain
channel for an extended period of the time.
2. The radio is set with a continuously transmitting limit. If the radio
is continuously transmitting longer than the time preset by the dealer,
the radio will stop transmitting and warning
b. TOT forbidden period:
1. A period in which the radio is forbidden to transmit after its
overtime activity.
2. During the period, if the PTT key is pressed, there will be a
transmitting is forbidden.
c. TOT pre-warning:
1. The pre-warning will sound before the TOT action.
2. After the sound of the warning, the timer will take action when the
transmitting time has gone beyond the limit.
d. TOT reset:
1. The time delay from releasing the PTT key to the resetting of the
timer is limited.
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