Kenwood TS-990S Service Manual
Also see for SP-990: Instruction manual
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TS-990S171ADJUSTMENTItem ConditionMeasurement AdjustmentSpecifications/RemarksTest-equipment Unit Terminal Unit Parts MethodHF BPF*1• 28M13) Main display f.:28.200000MHzMode: USBP.AMP: ONSpectrum analyzer settingStart frequency: 0MHzStop frequency: 60MHzTG level: -10dBmTrackinggeneratorSpectrumanalyzerRX(A/2)CN1CN93Check that it is thefrequency responseas shown.26.50MHz 35.00MHz• 35M~40M 14) Main display f.:37.500000MHzMode: USBP.AMP: ONSpectrum analyzer settingStart frequency: 0MHzStop frequency: 80MHzTG level: -10dBm35.00MHz 40.00MHz• 40M~46.5M15) Main display f.:43.000000MHzMode: USBP.AMP: ONSpectrum analyzer settingStart frequency: 0MHzStop frequency: 100MHzTG level: -10dBmAfter the adjustment, discon-nect the cable from CN1and CN93, and connect theoriginal cable.40.00MHz 46.50MHz3. MAIN RX1st mixer bal-ance*11) Main display f.:14.200000MHzMode: USBP.AMP: ONAGC: OFFSSG output: OFFDisconnect the cable fromCN1 and connect the SSGoutput to CN1.SSGDVMRX(A/2)CN1CN98(DUTY)RX(A/2)VR2 2.5V ±0.05V4. MAIN RX1st IF notch8.248MHz(adjustment2) *11) Main display f.: 7.000000MHzMode: USBP.AMP: ONAGC: OFFSSG f.: 8.248MHzSSG output: -35dBm(3.98mV)SSGAF VMRearpanelRX(A/2)EXT.SP2CN1RX(A/2)TC1TC2Adjust each trimmerto get the AF mini-mum output.Repeat the adjust-ment 4 to 5 times. |
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