146 Chapter 4
Optimizing Performance
Using the Option 521 Detector Calibration (Option 521)
Recalling and Applying a User Flatness Correction Array
Before performing the steps in this section, complete the section “Creating a User Flatness Correction
Array with a mm–Wave Source Module” on page 140.
1. Press
Preset.
2. Press
Amplitude > More (1 of 2) > User Flatness > Configure Cal Array > More (1 of 2) > Preset List > Confirm Preset.
3. Press
More (2 of 2) > Load/Store.
4. Ensure that the file FLATCAL2 is highlighted.
5. Press
Load From Selected File > Confirm Load From File.
This populates the user flatness correction array with the data contained in the file FLATCAL2.
The user flatness correction array title displays User Flatness: FLATCAL2.
6. Press
Return > Flatness Off On.
This activates flatness correction using the data contained in the file FLATCAL2.
Using the Option 521 Detector Calibration (Option 521)
CAUTION Using the Option 521 Detector Calibration softkey changes the factory calibration. Avoid
using this feature unless following a service center’s recommendations.
This calibration should be done whenever the instrument temperature changes beyond
specified parameters or and when greater amplitude flatness is required around the
500 MHz frequency transition. Refer to the Data Sheet.
NOTE If the Option 521 Detector Calibration is inadvertently used, the PSG has the ability to recall
the factory amplitude flatness calibration. Refer to “Restoring the Factory Flatness
Calibration”.
The purpose of this calibration is to improve the 500 MHz frequency transition to compensate for
changes in temperature. The 500 MHz frequency transition can degrade as the temperature changes.
By using the detector calibration, when the instrument temperature change occurs, the PSG’s flatness
performance can be optimized. Refer to the Data Sheet.
Running the Option 521 Detector Calibration
Following the following steps to run the Detector calibration:
• Press
Amplitude > More > More > Option 521 Detector Calibration > Execute
Restoring the Factory Flatness Calibration
The instrument’s original factory calibration settings can be restored by the following steps:
• Press
Utility > Power On/Preset > Restore System Defaults
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