Corrections - Keysight n9020a Service Manual

Service and Diagnostics Menus
Service Key Descriptions

Corrections

The Corrections menu allows the technician to activate and deactivate specific
amplitude correction sets. With this capability, the technician can determine if
an anomaly is a result of raw hardware performance or incorrect correction
data. It also allows the technician the ability to measure the raw hardware
performance when all corrections are set to Off.
RF Flatness
Displays a menu which allows the technician to activate and deactivate the
corrections unique to the RF flatness of the analyzer. RF Flatness
corrections consist of two major parts: raw flatness corrections and
temperature corrections. These corrections are summed together and
applied by using RF gain, IF gain, and/or "video shift" (post-digitized
mathematical offset). The selections in this menu allow the corrections to
be applied or not applied to facilitate troubleshooting the cause of
flatness-related problems.
Flatness Video Shift On/Off
The Flatness Video Shift turns off the corrections for gain vs.
frequency. It does not turn off the corrections for changes in the
analog IF gain that accompany flatness changes. This function turns
both the gain and video shift on or off, but does not affect the
temperature corrections. When set to off, it is possible to measure
the raw flatness of the spectrum analyzer while maintaining the
temperature corrections.
When Flatness Video Shift is Off, the Advisory Event "Flatness Video
Shift OFF" will be displayed.
When Flatness Video Shift is ON, the Advisory Event "Flatness Video
Shift OFF" will be cleared.
Temperature Gain & Tilt On/Off
This function controls both temperature adjustment mechanisms:
overall gain vs. temperature, and the temperature-proportional tilt of
the gain vs. frequency.
When Temperature Gain & Tilt is OFF, the Advisory Event "Flatness
Temperature Gain & Tilt OFF" will be displayed.
When Temperature Gain & Tilt is ON, the Advisory Event "Flatness
Temperature Gain & Tilt OFF" will be cleared.
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