Kenwood TK-390 Service Manual

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Contents

4TK-3902. Scan Operating2-1. Scan Types• Single Group ScanYou can scan all valid (ADD) channels in the displayedgroup that can be selected with the group selector.• Multiple Group ScanYou can scan all valid (ADD) channels in the all valid(ADD) group.2-2. Scan Start ConditionOne or more non-priority channels must be added to allchannels that can be scanned. The transceiver must be innormal receive mode (PTT off).When you activate the key or the toggle switch (to rightposition) programmed to the scan function, the scan starts.The scan icon "SCN" lights and "SCAN" or revert channel(programmable) is indicated on 7-digit alphanumeric display.2-3. Scan Stop ConditionThe scan stops temporarily if the following conditions aresatisfied.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 channel for which receivingsignalling is not set by the programming software orwhen the monitor (signalling cancel) function is activated.2-4. Scan Channel Types1) Priority channel 1 is the most important channel for thescan, and always detects a signal during scan and whenthe scan stops temporarily.2) Priority channel 2 is the next important channel for thescan, and always detects a signal during scan and whenthe scan stops temporarily at a channel other than prioritychannel 1.3) Non-priority channels detects a signal during scan. Forthe channels that can be selected with the group or chan-nel selector when the scan does not occur, adds an indi-cator "A" lights.2-5. Priority Channel SettingPriority channels 1 or 2 can be set as follows with theprogramming software (KPG-38D).1) Specify priority channels 1 or 2 as fixed priority channels.2) Make selected channels, priority channels.3) Operator delectableSpecify the initial channel before the operator changes it.2-6. Scan Type According to the Priority Channel1) When no priority channels are set : Only the non-prioritychannels are scanned.If a non-priority channel stops temporarily, it stops untilthere is no signal on the channel.OPERATING FEATURES2) When one priority channel is set : Either priority channel1 or 2 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 thereis no signal on the priority channel.3) When two priority channels are set : The non-prioritychannel, priority channels 1 and 2 are scanned.If a non-priority channel stops temporarily, priority chan-nel 1 and 2 signals are detected at certain intervals.If priority channel 2 stops temporarily, the priority chan-nel 1 signal is detected at certain intervals.If priority channel 1 stops temporarily, it stops until thereis no signal on priority channel 1.2-7. Revert ChannelThe revert channel is used to transmit during scanningand set by the programming software (KPG-38D).1) Priority 1The transceiver reverts to the priority channel 1.2) Priority 1 with talkbackThe transceiver reverts to the priority channel 1.If you press PTT during a resume timer (dropout delaytime, TX dwell time) or calling, you can transmit on cur-rent channel to answer to the call however revert channelis set to priority channel 1.After resume time, scan re-starts and transmission chan-nel is return to priority channel 1.3) Priority 2The transceiver reverts to the priority channel 2.4) Priority 2 with talkbackThe transceiver reverts to the priority channel 2.If you press PTT during resume timer (dropout delaytime, TX dwell time) or calling, you can transmit on cur-rent channel to answer to the call however revert channelis set to priority channel 2.After resume time, scan re-starts and transmission chan-nel is return to priority channel 2.5) Selected channelThe transceiver reverts to the channel before scanning orthe channel that you changed during scan.6) Last called channelThe transceiver reverts to the last called channel duringthe scan.7) Last used channelThe transceiver reverts to the last used (transmitted)channel during scan. "Last used" revert channel includestalkback function.8) Selected with talkbackThe transceiver reverts to the channel before scanning orthe channel that you changed during scan.2-8. Scan EndWhen you reactivate the key or the toggle switch (to leftposition) programmed to the scan function during scanmode, the scan ends.The scan icon "SCN" and "SCAN" or revert channel (pro-grammable) display goes off.