Agilent Technologies E4438C - Manual (Page 97)

Adjustments
Adjustment Relationships
4- 5
Adjustment Relationships
Anytime an adjustment is made to the signal generator other related adjustments may be affected. For
optimal performance, whenever an adjustment is performed, the related adjustments should also be
performed.
Analog Bus ADC Calibration Related Adjustments
The following adjustments are optimized if the “Analog Bus ADC Calibration” on page 4-8 has been run:
• “VCO Bias Potentiometer Calibration” on page 4-11
• “FM Inverting Amplifier Offset Calibration” on page 4-18
• “VBLO Mixer Bias Calibration” on page 4-29
• “ALC Modulation Driver Bias Calibration” on page 4-35
• “Power Search Calibration” on page 4-39
• “I/Q Gain/Offset/Quadrature Calibration” on page 4-41
• “I/Q Impairment Calibration” on page 4-42
Synthesizer Potentiometer Related Adjustments
The Lock Angle Potentiometer Calibration (Not Used with Option UNJ or Option 506) is preset fully
counter-clockwise in the VCO Bias Potentiometer Calibration . Both adjustments should always be performed
together.
• “VCO Bias Potentiometer Calibration” on page 4-11
• “Lock Angle Potentiometer Calibration (Not Used with Option UNJ or Option 506)” on page 4-12
AM Accuracy Related Adjustments
• “Internal Source Calibration” on page 4-10
• “AM Audio Path Offset Calibration” on page 4-26
• “AM Gain Calibration” on page 4-40
I/Q Modulation Accuracy Related Adjustments
• “VBLO Mixer Bias Calibration” on page 4-29
• “I/Q Gain/Offset/Quadrature Calibration” on page 4-41
• “I/Q Impairment Calibration” on page 4-42
Burst Modulation Accuracy Related Adjustments
• “Burst Modulator Calibration” on page 4-27