Kenwood TKR-840 Service Manual

Also see for TKR-840: Brochure & specs Instruction manual

TKR-840OPERATING FEATURESProgrammable Function DescriptionMonitor Momentary The QT/DQT decoder is momentarily disabled.CW ID On The CW ID is transmitted.CW Message 1-8 On The CW Message 1 to 8 is transmitted, respectively.TOT Enable The Time Out Timer is enabled.TOT Disable The Time Out Timer is disabled.TOT Disable/Enable The Time Out Time is toggled between enabled and disabled.Hold Time Enable The parameter of Repeat Hold Time is enabled.Hold Time Disable The parameter of Repeat Hold Time is disabled.Hold Time Disable/Enable The parameter of Repeat Hold Time is toggled between disabled and enabled.Scrambler Off Disables an installed optional voice scrambler board.Scrambler On Enables an installed optional voice scrambler board.Scrambler On/Off Toggles between enabling and disabling an installed optional voice scrambler board.Digital Pager PTT Accepts the external paging encoder's PTT on AUX Input 2.Digital Pager Data Accepts the external paging encoder's digital signal on AUX Input 3.Reset Resets to default condition set up by FPU.None No function.• The following Programmable Functions are output functions used to tell the condition of the TKR-840 to an external device.• The output functions can be assigned to only AUX Outputs as follows.Programmable Function DescriptionCOR(Carrier Operate Relay) This function becomes valid if an RF carrier is present.TOR(Tone Operate Relay) This function becomes valid if an RF carrier and specified QT/DQT are present.TXS(TX Sense) This function becomes valid when the transmitter is keyed.RX Unlock This alarm function becomes valid if the RX PLL circuitry becomes unlocked.TX Unlock This alarm function becomes valid if the TX PLL circuitry become unlocked.Exciter Temperature This alarm function becomes valid if the temperature of transmitter's exciterexceeds approximately 203° F (95° C) while transmitting.Power Supply Upper Limit This alarm function becomes valid if the DC power supply voltage exceeds thepreset point. The preset point is selected in the range of 13.9V to 15.9V.Power Supply Lower Limit This alarm function becomes valid if the DC power supply voltage becomes lessthan the preset point. The preset point is selected in the range of 11.7V to 13.8V.Exciter Power Upper Limit This alarm function becomes valid if the transmitter's RF Power output exceeds the presetpoint in High power range. The preset point is selected in the range of 5W to 7W.Exciter Power Lower Limit This alarm function becomes valid if the transmitter's RF Power output becomesless than the preset point in High power range. The preset point is selected in therange of 1W to 4W.RX Signal Detect (Above) This function becomes valid if the receive signal strength exceeds the preset point.The preset point is selected in the range of -120dBm to -80d8m.RX Signal Detect (Below) This function becomes valid if the receive signal strength becomes less than thepreset point. The preset point is selected in the range of -120dBm to -80dBm.Selectable AUX Outputs which are set up as Selectable appear in the available Function Listfor the AUX Input Functions and Key Assignment. This allows AUX Inputs and PFKeys to be used to control AUX Outputs.7