User`s guide

Agilent E6432A Microwave Synthesizer User’s Guide 3-127
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External Modulator Gain Calibration
NOTE If other combinations of hardware are being used in the external
leveling loop configuration that do not have an operational range equal
to the external detector being used, their operational range must be
used instead.
For complete specifications, refer to “Specifications and
Characteristics” on page 6-1.
Related Topics
Soft Front Panel Help
Pull Down View Menu
Pull Down Calibration Menu
Start an External Modulator Gain Calibration
Start, available from the External Modulator Gain Calibration Dialog
Box, starts an external modulation-gain calibration on an external
leveling loop configuration over a frequency range specified by the start
and stop frequency values at points specified by the step value. When
completed, the calibration results are loaded into the synthesizer's
FLASH memory.
NOTE This calibration could take up to 15 minutes to complete and can not be
aborted once it has started; it must run to completion.
An external modulation-gain calibration is used to adjust the external
leveling loop configuration and provide adjustment values that enhance
the performance when switching between open and closed loop.
Assuming the factory preset values remain present, this calibration has
no effect when the external leveling loop configuration is closed, it only
affects the output power when the loop is opened.
This calibration is required (or desirable) if the operator plans to use an
external leveling loop configuration and operate the synthesizer in open
loop mode. This calibration is good for the frequency range defined by
the start and stop values entered by the user. The smaller the step size,
the more accurate the adjustment values are, but this enhanced
accuracy is at the cost of increased time for the calibration process.
There is only one adjustment made for the full power range at any
given frequency, so adjustment values are not optimal for