Kirisun PT4200, Service Manual

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7
PT4200 SERVICE MANUAL
Chapter 4 Function Description and Parameter
Setting
4.1 Major Functions
4.1.1 16 Channels/15 ChScanning Channel
The radio stores 16 channels including one scanning channel.
4.1.2 Scanning Function Control
If you switch the channel to channel 16, the radio is in the
scanning state. After starting scanning, it will pause when receiving
signals.
If you switch the channel to channel 1-15, the scanning function
is inactivated.
4.1.2.1 Carrier Wave Control Scanning
If the radio scanning setting is carrier wave control
scanning , switch the channel to channel 16 to set the radio in the
scanning working mode.
Each channel can be set the scanning added/deleted function
solely: if the setting is scanning added, the channel will be added in
the scanning list; if the setting is scanning deleted, the channel will
not be in the scanning list.
The radio starts scanning from channel 1 to 16 repeatedly in the
consequence of the scanning list. If signals are detected on a
channel ( if the channel is set with receiving signaling the carrier
wave must match the signaling), the radio pauses on that channel
and will restarts scanning 0.5~5 seconds (scanning delay time) after
the signals disappear.
If you switch the channel to channel 1~15, scanning is
inactivated.
4.1.2.2 Time Control Scanning
If the radio scanning setting is time control scanning , switch
the channel to channel 16 to set the radio in the scanning working
mode.
Each channel can be set canning added/deleted function solely:
if the setting is scanning added, the channel will be added in the
scanning list; if the setting is scanning deleted, the channel will not
be in the scanning list.
The radio starts scanning from channel 1 to 16 repeatedly in the
consequence of the scanning list. If signals are detected on a
channel (if the channel is set with receiving signaling the carrier
wave must match the signaling), the radio pauses on that channel
and will restarts scanning 0.5~5 seconds (scanning delay time) after
the signals disappear.
If you switch the channel to channel 1~15, scanning is
inactivated.
Figure 3.8 Semiconductor Component Packaging Illustration:
4.1.2.3 Priority Channel
You can set one channel in the scanning list as the priority
channel, which has the highest priority during scanning. The radio
scans the first non-priority channel in the canning list and then
scans the priority channel, the next non-priority channel in the
scanning list, and then the priority channel again. It goes on
scanning in such sequence.
4.1.2.4 Revert Channel
If you press PTT button when the radio is in scanning state, the
radio will transmit on the revert channel , which has 6 types:
Selected channel: The first channel in the scanning list.
Selected c current channel: If the radio is in the state of
scanning pause, it will transmit on the current communication
channel. Otherwise it will transmit on the first channel in the
scanning list.
Priority channel: The radio will always transmit on the priority
channel set in the scanning list when pressing PTT.
Priority c current channel: If the radio is in the state of
scanning pause, the radio will transmit on the current
communication channel. Otherwise it will transmit on the priority
channel in the scanning list.
Last called channel: The last channel that received signals.
Last called c current channel: If the radio is in the state
of scanning pause, the radio will transmit on the current
communication channel. Otherwise it will transmit on the last called
channel.
The current communication channel is the channel on which the
radio pauses in the 4 following situations:
1 When the radio receives signals and does not restart
scanning, the radio will stay on the current channel.
2 The radio will stay on the current channel during 0.5~5
seconds (scanning delay time) after signals disappear.
3 The radio will stay on the current channel when pressing
the PTT during scan.
4 After releasing the PTT to end transmitting, during the
preset transmitting dwell time, the radio will stay on the current
channel. After the preset transmitting dwell time 0.5~5 seconds, the
radio will restart scanning again.
4.1.2.5 Retrace Period
If the priority channel has been set in the scanning list and
retrace period is also set, when the radio receives signals on a non-
priority channel and pauses scanning, it will retrace the priority
channel in a certain period (0.3~5s). If signals are detected on the
priority channel, it will stay on the priority channel; if no signal is
detected on the priority channel, it returns to the original channel it
stays on.
4.1.3 CTCSS/DCS
CTCSS/DCS can realize selective calls and group calls. On the
same channel, only the two parties whose CTCSS/DCS are
identical can communicate. CTCSS/DCS signaling code on the
channel is preset.
4.1.4 TOT
The purpose of the time-out timer is to prevent any single
person from overlong using a channel to transmit and affecting the
whole group communication.
If the radio transmits longer than the preset TOT time limit, the
radio will stop transmitting and warning tone sounds. To stop the
warning tone, release the PTT button. Press the PTT again you can
resume transmitting.
4.1.5 Auto Power Saving
When no signals are being received or no operations are being