Keysight FieldFox B Series User Manual page 210

SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)
SA Mode Settings
Burst Align Now
sweeps.
Channel Equalization (IQA and RTSA Only)
During continuous sweep operation for RTSA and continuous acquisition
for IQA, automatic Alignments will NOT interrupt the ongoing
measurement, but when necessary, will occur opportunistically as settings
are changed. When no automatic alignment updates occur, existing
alignments can become stale over time and temperature drift, so a
warning annotation on the left panel will light up indicating that
alignments need updating. When alignments need updating, you will see a
"Channel Equalization" or "ChanEq" error message displayed.
IQA and RTSA modes use proprietary channel equalization algorithms to make
extremely accurate channel measurements over the full frequency range of the
FieldFox.
How to make Channel Equalization Alignments settings
These settings do NOT survive a Preset or Mode Preset.
1. Press Cal 5 >
2. Then choose from the following:
210
— Auto (Default setting) SA measurement applications monitor
changes in internal temperature and the time since last alignment
update and trigger the need for a new update when the alignment
becomes stale. The alignment is deemed stale after a significant
change in temperature or a significant time elapsed from the last
update. The temperature change and time duration necessary to
trigger an alignment update is predetermined in the factory.
— OFF The alignment process is NOT performed. Only factory
correction values are used.
— Hold The alignment process is stopped, but the last alignment
values are applied to subsequent sweeps.
An alignment is performed once and applied to subsequent
Individual Align
— Auto (Default setting) SA measurement applications monitor
changes in internal temperature and the time since last alignment
update and trigger the need for a new update when the alignment
becomes stale. The alignment is deemed stale after a significant
change in temperature or a significant time elapsed from the last
update. The temperature change and time duration necessary to
trigger an alignment update is predetermined in the factory.
Some examples of the conditions when alignments occur are: This
could be a Center frequency change, or it could be as simple as
requesting a Single sweep. Also, unique alignments are required at
ChanEq Alignment
>
Keysight N9938-90006 User's Guide