Kenwood TK-380 Service Manual

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Contents

TK-3809OPERATING FEATURES6) Battery WarningThis transceiver has battery warning feature. If the lowvoltage is detected during transmission, the transceiver warnsit by flashing red "LED".Then more low voltage is detected during transmission, thetransceiver stops transmission and warns it by flashing red"LED" and beep.Please notice "standard" for the battery exchange, chargingtime by flashing red LED and beep.7) Minimum VolumeThe minimum volume is programmable (off (0) to 31). Thetransceiver remains the minimum volume level however themechanical volume position is set to zero.4-2. In Case of Trunking Format1) Call indicatorThe call indicator can be programmed for each group. Intrunked system, it can be set to respond to a selectable decodeID or one of two fixed IDs, except block IDs. When a call isreceived with a selectable decode ID, the call indicator flashes.When a call is received with a fixed ID, the call indicator lightscontinuously.On a conventional system, the call indicator can beprogrammed to light for each QT or DQT code. It keeps flashingwhile a call is being received. It is turned off by pressing anyfront panel key.2) Free system ringbackThis feature is available only when a telephoneinterconnected ID code is selected. If a busy tone sounds whenthe PTT button is pressed, the transceiver enters this modeautomatically.When the PTT button is released, a beep sounds for 400msto indicate that the mode has been entered. If the scan is on, itis resumed (the “SCN” mark goes on). When any repeaterbecomes available, a ringing tone sounds and this mode ends.The mode is terminated when the system, group, scan, PTT,key is changed.3) System searchThis feature can be programmed to automatically accessother programmed systems when the selected system cannotbe accessed. If an intercept tone sounds when the PTT buttonis pressed after setting the mode, the transceiver has enteredthe mode.If the group ID is a telephone interconnect ID, the transceiverthen attempts to access, in succession, other systems thathave a telephone interconnect ID in the revert group location.If the group ID is a dispatch ID, the transceiver attempts toaccess other systems that have a dispatch ID programmed inthe revert group location.If there is no system to be accessed, an intercept tonesounds, the mode is terminated, and the transceiver returns tothe first system. If the access is successful, the mode isterminated, and the searched system becomes the newselected system (If during scanning, the scan stops).4) TranspondThis feature can be programmed to turn on and off for eachgroup. If the ID of the group for which transpond is enabled isreceived, two data messages (transmit ID and turn-off code)are automatically transmitted if the PTT button is not pressedas a response within the time set (0 to 300 seconds in 1-secondincrements). If the PTT button is pressed within the time, thetranspond is not preformed.5) Transmit inhibitThe transceiver can be programmed with a transmit inhibitblock of ID codes. If an ID code within this block is decodedthe preset time before the PTT button is pressed, transmissionis inhibited. The BUSY indicator lights and a busy tone soundsuntil the PTT button is released to indicate that transmission isnot possible (except clear-to talk mode).Transmission with the group for which the encode ID is notset is inhibited, and the busy tone is output while the PTT buttonis held down, regardless of the clear-to -talk setting.6) Auto TELA telephone interconnect call can be made by simplypressing the key by assigning this feature to the key. Thisfeature accesses the TEL channel of the available systemautomatically.When the key is pressed, a queue tone is output, and the“AUTO TEL” appears on the alphanumeric display along witha flashing handset indicator ( ) to indicate that this mode hasbeen entered. If the TEL ID is set for the revert system, theTEL channel of that system is accessed. If all TEL channelsare busy, an attempt is made to access the TEL channels ofanother system in which the TEL ID code has been pro-grammed. It is repeated for 60 seconds until the accesssucceeds. If the access succeeds, a dial tone returns from therepeater. If the key is pressed again when the queue tone issounding, this mode is canceled.If the access fails after 60 seconds, a deny tone is outputand this mode is terminated. When the talk ends, the revertsystem/group returns. When the scan mode is effective, thescan resumes. The Auto TEL feature can be programmed toturn on or off for each system.4-3. In Case of Conventional Format1) "TOT" Pre-AlertThe transceiver has "TOT" pre-alert timer. This parameterselects the time at which the transceiver generates "TOT" pre-alert tone before "TOT" is expired."TOT" will be expired when the selected time passes froma TOT pre-alert tone.2) "TOT" Re-Key TimeThe transceiver has "TOT" re-key timer. This timer is thetime you can not transmit after "TOT" exceeded. After "TOT"re-key time expired you can transmit again.