Kenwood TK-780 Service Manual Supplement page 8

TK-780/H
SCAN start condition
One or more non-priority channels must be added to all
channels that can be scanned. The transceiver must be in
normal receive mode (PTT off).
When you activate the key programmed to the scan func-
tion, the scan starts. The scan icon "SCN" lights and "–
SCAN–" or revert channel (programmable) is indicated on
alphanumeric display.
Scan stop condition
The scan stops temporarily if the following conditions are
satisfied.
1) A carrier is detected, then signalling matches on chan-
nels for which receive the signalling is set by the pro-
gramming software.
2) A carrier is detected on the channels for which receiving
signalling is not set by the programming software or
when the monitor (signalling cancel) function is activated.
Scan channel types
1) Priority channel is the most important channel for the
scan, and always detects a signal during scan and when
the scan stops temporarily.
2) Non-priority channels detects a signal during scan. For
the channels that can be selected with the group or chan-
nel up/down key when the scan does not occur, adds an
indicator " " lights.
Priority channel setting
A priority channel can be set as follows with the program-
ming software (KPG-49D).
1) Specify a priority channel as a fixed priority channel.
2) Make a selected channel, a priority channel.
Scan type according to the priority channel
1) When no priority channel is set : Only the non-priority
channels are scanned.
If a non-priority channel stops temporarily, it stops until
there is no signal on the channel.
2) When priority channel is set : Either priority channel is
scanned.
If a non-priority channel stops temporarily, a priority chan-
nel signal is detected at certain intervals.
If a priority channel stops temporarily, it stops until there
is no signal on the priority channel.
Revert channel
The revert channel is used to transmit during scanning
and set by the programming software (KPG-49D).
1) Priority
The transceiver reverts to the priority channel.
8
OPERATING FEATURES
2) Priority + talkback
3) Selected channel
4) Last called channel
5) Last used channel
6) Selected + talkback
function during scan mode, the scan ends.
(programmable) display goes off.
scan. When scan stops on unnecessary channel for ex-
ample by interference of the other party, activate the delete/
add function (for example press the key), then that channel
is deleted temporarily and scan re-start immediately.
rarily to scan sequence, select the desired (deleted) channel
during scan, activate the delete/add function (for example
press the key) before scan re-start.
temporary deleted or added channels are returns to pre-set
delete/add, when the transceiver exits from scan mode.
4. Details of Features
4-1. Common Trunking format and Conventional Format
increments from 15 seconds to 10 minutes. If the transmit-
ter is keyed continuously for longer than the programmed
time, the transmitter is disabled and a warning tone sounds
while the PTT button is held down. The alert tone stops
when the PTT button is released.
The transceiver reverts to the priority channel.
If you press PTT during a resume timer (dropout delay
time, TX dwell time) or calling, you can transmit on cur-
rent channel to answer to the call however revert channel
is set to priority channel.
After resume time, scan re-starts and transmission chan-
nel is return to priority channel.
The transceiver reverts to the channel before scanning or
the channel that you changed during scan.
The transceiver reverts to the last called channel during
the scan.
The transceiver reverts to the last used (transmitted)
channel during scan. "Last used" revert channel in-
cludes talkback function.
The transceiver reverts to the channel before scanning or
the channel that you changed during scan.
Scan end
When you reactivate the key programmed to the scan
The scan icon "SCN" and "–SCAN–" or revert channel
Temporarily delete/add
It is possible to delete or add channel temporarily during
When you would like to add the deleted channel tempo-
That channel is added temporarily to scan sequence. The
Time-out timer
The time-out timer can be programmed in 15 seconds