180 Keysight N9927-90001 User’s Guide
SA (Spectrum Analyzer) Mode
SA Mode Settings
Average Count
The Average Count setting is used mainly with the Average Trace State
described above. In this Trace State, the Average Count setting determines the
number of sweeps to average. The higher the average count, the greater the
amount of noise reduction.
When Trace (display) State is set to Average, MaxHold, or MinHold, the
average counter is shown in the left edge of the screen below the Average
Type.
For all three of these Trace States, when Sweep 3
Continuous is set to OFF,
press Restart
to reset the sweep count to 1, perform <n> sweeps, then return
to Hold.
How to set Average Count
—Press Meas Setup 4
—Then Average Count
— Enter a value from 1 to 10,000 using the numeric keypad, the arrows,
or the rotary knob.
—Press Enter
Alignments
This section contains the following:
— “Overview” on page 180
— “All Alignment and Align All Now” on page 183
— “Individual Alignments” on page 184
Overview
All Alignment or Align All Now corrects for receiver drift over temperature and
time. 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. Until the update is
performed, annotation indicating “questionable amplitude” is displayed
AMPTD?.
To better reflect the enhancements implemented during the alignment
process, for firmware versions
>A.10.15 "IF Flatness Alignment" is now
referred to as "Channel Equalization" or "Channel Equalization Alignment"
(ChanEQ Alignment
).
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