Keysight N9912A Service Guide 3-9
Tests and Adjustments
Adjustments (Keysight N7841A Software Package)
Adjustments (Keysight N7841A Software Package)
The adjustments section of the Keysight N7841A software package may be
used to fine-tune your analyzer.
The N7841A software package is not included with the analyzer; it must be
ordered separately. It can be downloaded from the Internet and a license
purchased on-line, or it can be ordered on a CD-ROM. Go to
www.keysight.com/find/calibrationsoftware for further information.
These adjustments consist of:
— Three general adjustments that are used to adjust the general functions of
the analyzer.
— Seven adjustments specifically for the SA (spectrum analyzer) functions.
Total adjustment time will vary from 1 to 80 minutes depending upon options
installed.
If multiple adjustments are to be performed, perform them in the order listed
by the N7841A software.
Details for these adjustments, and recommended troubleshooting information,
can be found in the N7841A help file.
General Adjustments
Total time for these adjustments is six minutes.
— “Frequency Accuracy”
— “ADC Overload Adjustment”
— “Error Terms (NA) Adjustment”—This adjustment is part of the Error Terms
Test (see “Performance Tests (Keysight N7841A Software Package)” on
page 3-8) and should be performed every 12 months. It refreshes the
definition of the preset calibration.
Spectrum Analyzer Specific Adjustments
Total time for these adjustments is 75 minutes.
— “IF Frequency Response Adjustment”
— “Absolute Amplitude Adjustment”
— “Frequency Response with Preamp On Adjustment”
— “Frequency Response with Preamp Off Adjustment”
— “Attenuator Slope Adjustment”
— “IF Offset Adjustment”
— “Spur Dodging Adjustment”
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