User`s guide

3-140 Agilent E6432A Microwave Synthesizer User’s Guide
Soft Front Panel Help
I/Q Calibration (Option UNG Only)
Quadrature (Offset)
Quadrature (Offset) is used to adjust the phase angle between the I and
Q input vectors
I/Q Upconverter Calibration Frequency
The I/Q Upconverter Calibration Frequency is used to select the
frequency where a calibration is performed.
Enter an I/Q Upconverter Calibration Frequency from
2 GHz </= 20 GHz.
The I/Q Upconverter calibration is only valid for synthesizer
frequencies between 2 GHz </= 20 GHz. The I/Q Upconverter
calibration cannot be used for synthesizer frequencies from
10 MHz < 2 GHz.
For synthesizer frequencies from 10 MHz < 2 GHz, a Power Search may
be used to improve level accuracy with ALC off. Alternately, the
IFAttenuator, available from the pull down View menu by selecting
Configuration, can be adjusted in 2 dB steps to obtain the correct level
within +/- 1 dB; above 2 GHz or with ALC on, this is unnecessary
because the I/Q Upconverter calibration controls the level accuracy.
Calibrate I/Q Upconverter
The Calibrate I/Q Upconverter button is used to run an iterative
algorithm that drives the ALC modulator with a DAC while the ALC is
off so that the output signal power level matches the setting selected.
The most recently run level calibration supersedes any previous level
calibrations. This is because a calibration DAC is adjusted during a
level calibration and depending on which level calibration is performed
(IF Calibration or I/Q Upconverter Calibration), its DAC settings are
used.
Restore Factory I/Q Upconverter Calibration
The Restore Factory I/Q Upconverter Calibration button can be used to
return to the original factory calibration values. All values from any
previous user calibrations are lost.
When the Quadrature Skew is… The phase angle is…
Zero 90 degrees
Positive increases the angle from 90 degrees
Negative decreases the angle from 90 degrees