JIL_SX-200_频率调制校准手册

ALIGNMENT PROCEDUREPLL ADJUSTMENT1.Sub VCO Frequency Adjustment (110.000 MHz)Receive 108.000 MHz.Connect the frequency counter with Pin No.13 of IC103(SO42P)and adjust the trimmer (TC-102)for 110.000 MHz +100 Hz.2.VHF Local Frequency AdjustmentSet the Fine Tuning volume to the center position and connect the frequency counter with VC01 of Tuner P.C.Board.Receive Freq.IFLocal FregAdjustment26.000MHz+10.736.700TC-10344.995+10.755.69545.000+10.755.70057.995+10.768.69558.000-10.747.300TC-10488.000-10.777.3003.VHF (High),UHF Local Frequency AdjustmentConnect the frequency counter with VC02 of Tuner P.C.Board.Receive Freq.IFLocal Freq.Adjustment108.000MHz+10.7118.700139.995+10.7150.695140.000+10.7150.700180.000+10.7190.700380.000(380+10.7}/3130.233-105514.000(514+10.71/3174.900VCO ADJUSTMENTApparatus used:Digital Multi-Tester (DC Range)Connection Method:Connect with VC line of VCO P.C.Board.1.26.000MHz44.995MHzReceive Freq.AdjustmentVoltage adjusted allowance26.000MHzL2040.65V0.1V44.995MH2TC-20412.1±0.52.45.000MHz~57.995MHz45.000MHzL2053.7V±0.1V57.995MHzTC20511.3±0.13.58.000MHz~88.000MHz58.000MHzL2060.6V±0.1V88.000MHzTC-20612.0±0.14.108.000MHz~139.995MHz108.000MHzL2030.58V±0.1V139.995MHzTC-2039.65±0.25.140.000MHz~180.000MHz140.000MHzL2020.8V±0.05V180.000MHzTC-20210.7±0.16.380.000MHz≈514.000MHz380.000MHzL2010.65V±0.05V514.000MHzTC-20112.4±0.1Remarks:Voltage of low frequency shall be adjusted at L-000 (Coils)first,then adjust voltage of high frequency byTC-000 (Trimmers).If voltage of low frequency varies after voltage adjustment of high frequency,several time adjustment is required.-2