Kenwood TK-880 Service Manual

Also see for TK-880 series: Programming instructions Instruction manual Instruction manual Instruction manual Instruction manual

13TK-880/H• Status/short/unit ID message serial output(Option)Whether a received Status/Short message or PTT ID isoutput or not from serial port.• Caller ID displayPTT ID is displayed on LCD.• Call alert (Continuous)The radio can provide the alert tone repeatedly until nextoperation.• PTT ID sidetoneThis function allows a single beep sound after the PTT ID(MSK) for FleetSync™ signalling is encoded.• Caller ID stackThe radio stores the last 3 received caller IDs to volatilememory. GPS Report (Optional)ANMEA-0183 GPS unit must be installed.• GPS report modeGPS data can be sent automatically or upon request.Manually sending GPS data works regardless of this setting.Auto : GPS data is sent both automatically and by re-quest. GPS Auto TX Interval and GPS Time Mark must beadjusted if required.Poll : GPS data is sent upon request from dispatcher.• GPS report intervalInterval time between automatic GPS data transmis-sions.• GPS time mark (Per mobile)The amount of time from the 0 (zero) minute of the stan-dardized GPS UTC time to starting the first transmission ofGPS data. It must be set to a different value for each radiounit to avoid a transmission crash.• Send GPSPressing this key causes the transceiver to send a singleGPS data.• GPS report on data group/channelGPS data transmission is made on the Data System/Group in trunking format and on the Data Group/Channel inconventional format.• Received GPS data outputAny selected sentence can be output through the radioserial port (COM1 or COM0).1) MAP HEADER NMEA1 ($GPGGA), NMEA2 ($GPGLL),NMEA3 ($GPRMC)NMEA-0183 standard command. This should be set ac-cording to your PC application.2) MAP HEADER KW1 ($PKLDS)This is a Kenwood original sentence which consists of“$GPGLL + Fleet + ID + Status”. This item should be setaccording to your PC application.3) MAP HEADER KW2 ($PKLID)This is a Kenwood original sentence which consists of“Fleet + ID”. This should be set according to your PCapplication. Parameters• GTC countNumber of Go To data Channel messages to be sent be-fore transmitting a data message if it is being made on DataSystem/ Group. If a radio unit receives a GTC message, itwill move to the Data System/Group of the current system.Increase this item to make sure the called radio unit movesto the Data System/Group in trunking format and the DataGroup/Channel in conventional format.• Random access (Contention)When a channel (or all the repeater channels for Trunkingmode) is busy, radio unit will not transmit (depending on itsBusy Channel Lockout setting in conventional mode). Assoon as a channel is cleared, some transmissions maycrash. Random access is used to avoid this by employing arandom transmission sequence.• Number of retriesNumber of Retries is the maximum number of retrytransmission when no acknowledgement is received in theMaximum ACK Wait Time. Increase this item to improvedata communication reliability.• TX busy wait timeTX Busy Wait Time is the maximum amount of time be-fore giving up the data transmission when the channel (or allthe repeater channels for Trunking mode) is busy. Also, thistimer affects if it expires during Random Access period.• Maximum ACK wait timeMaximum ACK Wait Time is the maximum amount oftime to wait for an acknowledgement from the called radiounit. It is used as an interval time of retries. It must be setgreater than the ACK Delay Time of the called radio unit.OPERATING FEATURES