402 E8257D/67D, E8663D PSG Signal Generators Service GuidePost–Repair ProceduresPost–Repair Procedures MatrixPost–Repair Procedures MatrixTable 4-1 Post Repair Adjustments: Assemblies A1—A12 (For Prefixes < xx4928)Ad justments Replaced AssemblyThe following ad justments are listed in the order that theyshould be performed for proper calibration.A1 KeyboardA2 DisplayA2DS1 Display BacklightA3 Power SwitchA4 InverterA5 SamplerA6 Frac-NA7 Reference (Standard)A7 Reference (Option UNR/UNX)A8 Output (Analog)A8 Output (Digital)A9 YIG DriverA10 ALCA11 Pulse/Analog Mod GenA12 Low Band Fast PulseADC Calibration X X X X X X X X X XYIG–Driver Pre–Tune Calibration XVCO Bias Frac–N Calibration XInternal Source Calibration XAM Audio Path Offset Calibration X XKV vs. Frequency Calibration XTimebase Calibration (instruments with serial prefixesXFM Scale Offset Calibration X X XFM Path Offset Calibration X X XFM In–band Offset Calibration X X XFM Inverting Amplifier Offset Calibration XFM 1/2 Path Ratio Gain Calibration X X XMod Source Relative Gain Calibration X X XFM/PM Out–of–Band Calibration X X XFM/PM YO Frequency Compensation Calibration X X XDC FM Calibration X X XLow Frequency Output Calibration XExternal Input Peak Detector Calibration XTarget IQ Power Calibration X1/f Corner Calibration XIQ Time Skew RF XIQ Time Skew Baseband XALC Dynamic Calibration X X X XLowband Digital Prelevel Gain Calibration XVBLO Mixer Bias Calibration XLB Digital Gain Calibration XGain Adjustment Bypass Calibration (Frequencies ≤3.2 GHz) X X X XLow Band Power Flatness Calibration X X X XHigh Band Power Flatness Calibration X X X XHigh Band IQ Power Floor Calibration XLow Band IQ Power Floor CalibrationALC Modulator Calibration X X XHigh Band ALC Modulator Calibration XLow Band ALC Modulator Calibration XALC Mod Bias DAC Sensitivity Calibration X XAM Gain Calibration X X X XIQ Impairment Calibration XPower Clamp XPulse Width Calibration X X X X9V PTAT Abus Calibration X
