Kenwood TKR-850 Service Manual

Also see for TKR-850: Brochure & specs Function reference Instruction manual Instruction manual Programming reference

11TKR-85018. Channel SelectAUX I/O Ports 1~4 (1 or all 4) can each be set for “Chan-nel Select” providing up to 16 channel selection capability.These are 1 to 4 bit Binary Coded Decimal (BCD) inputs.AUX I/O 1 is a least significant bit (LSB). When all of AUX I/O Ports 1~4 set to Channel Select, “1110” input (LSB onthe right side) signifies the Channel 1 and “1101” input sig-nifies the Channel 2.When the Channel Select function isset to any AUX I/O ports, the Channel ‘X’ function (ChannelUp, Channel Down, Channel 1, etc.)can not be set to theAUX Input ports, but can be set to the PF Keys. Normallythe channel control is controlled by the Channel Select func-tion. If the Take Over function is executed, the channel con-trol is disabled to be controlled by the Channel Select andenabled to be controlled by the PF Keys.19. DC Power SaveThe TKR-850 has the DC Power Save feature. The DCPower Save Mode is activated when the DC Power Save Onfunction is executed. When the DC Power Save Mode isactivated, all panel LEDs except the Power LED are turnedoff, and the audio amplifier and the DSP becomes inactive.When the Display On function is executed while the re-peater is in the DC Power Save Mode, all panel LEDs be-come active as normal status indicators on the repeater, andthe audio amplifier and the DSP becomes active. However,when the Save Delay Timer A period expires, all panel LEDsexcept the Power LED are turned off and the audio amplifierbecomes inactive again, and when the Save Delay Timer Bperiod expires, the DSP becomes inactive. When the DCPower Save Mode is turned on or off, up to 3 functions pre-programmed into the Save On function or Save Off functionare executed in sequence.20. Power SupplyThe TKR-850 is able to use two Power sources that arecalled Main and Backup. When the Power source changesfrom Main to Backup or from Backup to Main, up to 3 func-tions pre-programmed into the Backup Power function orthe Main Power function are executed in sequence.21. Start UpWhen the TKR-850 is first turned on or is reset, up to 3functions pre-programmed into the Start Up function areexecuted in sequence.22. Optional BoardAn optional scrambler board can be installed in the TKR-850. Scrambler codes between 1 and 16 are available perchannel. If the scrambler board is not to be used (although itis installed), set the parameter to “Off”. When any Scram-bler code is set up and the Scrambler On function is ex-ecuted, the scrambler board is activated.OPERATING FEATURES / REALIGNMENTREALIGNMENT1. ModesUser modePC modeFirmware Programming modePC programming modePC test mode PC tuning modeMode FunctionUser mode Use this mode for normal operation.PC mode Use this mode to make various settings bymeans of the FPU through the RS-232C port.PC programming Use to read and write frequency data andmode other features to and from the repeater.PC test mode Use to check the repeater using the PC.This feature is included in the FPU.Firmware pro- Use when changing the firmware programgramming mode of the flash memory.2. How to Enter Each ModeMode OperationUser mode Power on.PC mode Received commands from PC.Firmware Pro- [PF1] key + Power on (one second).gramming mode3. PC Mode3-1. PrefaceThe TKR-850 repeater is programmed by using a personalcomputer, programming interface and KPG-66D software.3-2. Connection Procedure1. Connect the TKR-850 to the personal computer with theinterface cable.2. When power is applied, the user mode is entered imme-diately. When the PC sends a command, the repeaterenters the PC mode and displays “PC” on the 7-segmentLED. When data is being transmitted to the PC from therepeater, the TX LED flashes. The BUSY LED flasheswhen data from the PC is being received by the repeater.Note :• The data stored in the personal computer must matchthe model type, when it is written into the flash memory.• Change the TKR-850 to PC mode, then attach the inter-face cable.