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Creating a User Flatness Array, Example 2
This example shows how to use the synthesizer and a power meter
in manual entry mode. This example also introduces two features of
the synthesizer. The
softkey
Freq Follow simplifies the data entry
process and the
softkey
List Mode sets up a list of arbitrary test
frequencies.
The frequency follow feature automatically sets the source to a CW
test frequency equivalent to the active correction frequency in the
user flatness correction table. The front panel arrow keys are used
to move around the correction table and enter frequency-correction
pairs. Simultaneously, the synthesizer test frequency is updated to
the selected correction frequency without exiting the correction table.
To further simplify the data entry process, the synthesizer allows
you to enter correction data into the user flatness correction table
by adjusting the front panel knob until the desired power level is
displayed on the power meter. The user flatness correction algorithm
automatically calculates the appropriate correction and enters it into
the table. If you already have a table of correction data prepared, it
can be entered directly into the correction table using the front-panel
keypad of the synthesizer.
With the list mode feature, you may enter the test frequencies into a
table in any order and specify an offset (power) and/or a dwell time
for each frequency. When list mode is enabled, the synthesizer steps
through the list of frequencies in the order entered.
The user flatness correction feature has the capability of copying and
entering the frequency list into the correction table. Since the offset
in the list mode table is not active during the user flatness correction
data entry process, the value of the correction data is determined as
if no offset is entered. When user flatness correction and list mode
(with offsets) are enabled, the synthesizer adjusts the output power
by an amount equivalent to the sum of the correction data and offset
for each test frequency. You must make sure that the resulting power
level is still within the ALC range of the synthesizer.
1-36 Getting Started Advanced