Kenwood TKR-850 Service Manual

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

TKR-85039Fine-Tuning the TKR-850“ADJUSTMENT” items described in the Service Manualfor the TKR-850 give the factory-default adjustment proce-dure covering all adjustment items.However, it is not necessary to adjust all the items whenadjusting the power, deviation, receiver sensitivity, etc at thefrequency of the channel to be used by the TKR-850.Adjustment procedure at the frequency of thechannel to be used1. Program a channel frequency using the FPU (KPG-91D).2. From the FPU menu, select in the order of “EDIT”, “TestFrequency” and “CH paste” to rewrite the test frequencyfrom the factory-default to the one to be used for thechannel.Erase all channel frequencies rewritten through this op-eration and press the ENTER key to retrieve the factory-default test frequency.Refer to the explanation given under HELP for the FPU(KPG-91D) for details.3. Check whether the frequency rewritten under the “Testmode” of the FPU (KPG-91D) is correct, then select theitem to be adjusted from the FPU (KPG-91D) menu andadjust the set value for the item to an optimum value withthe “TEST” tag.Note :After adjustment of the “Max. Deviation”, be sure tocheck the “DQT balance”.The “5-tone” adjustment is required only for the Emarket products.1. Setting 1) Connect the unit to a suitable DC power supply.2. Write test 1) Turn the DC source switch on after connecting a PC and FPU cable to the radio. → “E1” appears on LED displayfrequency 2) Write the test and shipping frequency to the radio. → Green (BUSY) LED lights up3) End of test frequency writing.3. Setting 1) Connect the unit to a suitable DC power supply.2) Turn the power switch on after connecting a PC and FPU cable to the radio.3) Start up the program for the adjustment.Item ConditionMeasurement AdjustmentSpecifications/RemarksTest-equipment Unit Terminal PartsUnit MethodADJUSTMENTAlignmentMore than3.75kHzMore than3.75kHzATTEN 10dBRL –32.0dBm 10dB/MKR –46.000dB15.00kHzMKR15.00kHz–46.000dBDGCENTER 44.85000MHzRBW 300Hz *VBW 1.0kHzSPAN 50.00kHzSWP 2.0sec3dB Max.15kHzMore than40dB5.5~7.5kHz5.5~7.5kHzATTEN 10dBRL –32.0dBm 10dB/MKR –42.17dB25.00kHzMKR25.00kHz–42.17dBDGCENTER 44.85000MHzRBW 300Hz *VBW 1.0kHzSPAN 50.00kHzSWP 2.0sec3dB Max.25kHzMore than40dBFig. 1 Fig. 2 Fig. 32.5MHz 2.5MHzATTEN 20dBRL 10.0dBm 10dB/MKR –26.17dBm465.00MHzMKR465.00MHz–26.17dBmDGCENTER 465.00MHzRBW 300kHz *VBW 300kHzSPAN 50.00MHzSWP 50ms3dB Max.BPF center frequency (Factory-default)K : 465MHz, E : 455MHz, K2 : 496MHz,K3 : 415MHzMCF : Wide MCF : Narrow