Keysight N9938-90006 User’s Guide 187
SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)
SA Mode Settings
How to set AF RBW
1.
Press
BW 2
>
AF RBW
2.
Then choose from the following:
—
Auto
Couples AF BW to the Resolution BW in a 1-to-1 ratio.
—
Man
Enter a AF BW value using the numeric keypad, the
arrows, or the rotary knob. Then press a multiplier if necessary or
press
Enter
. Setting AF BW higher than RBW may smooth the trace.
The current AF RBW setting is shown at the bottom of the screen.
# AF RBW x.xx XHz
(#) means manual setting.
When the Res BW/AF RBW ratio exceeds 10,000, a
Meas UNCAL
warning may
appear to indicate that the AF RBW filter has reached the maximum capacity
for averaging.
Sweep Type
In SA mode, the FieldFox uses two sweep types to process inputs signals. The
sweep type that is currently being used (
FFT
or
Step
) is displayed in the
lower-left corner of the FieldFox screen.
For a more comprehensive tutorial, see Spectrum Analysis Basics (App Note
https://www.keysight.com/us/en/assets/7018-06714/application-notes/595
2-0292.pdf
How to set Sweep Type
1.
Press
BW 2
>
Advanced
>
Sweep Type
2.
Then choose from the following:
—
Auto
The FieldFox selects the most efficient sweep type based on
the Res BW. When Res BW is set to 200 kHz and below, FFT sweep
type is selected. Above 200 kHz, Step sweep type is being
performed.
—
FFT
The FieldFox uses FFT sweep type regardless of the Res BW.
—
Step
The FieldFox uses Step sweep type regardless of the Res BW.
This is useful for capturing impulsive noise that may be generated
from nearby electrical equipment.
To change this setting from Man to Auto, press AF RBW twice.
Summary of Contents for N9913B
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Page 884: ...884 Keysight N9938 90006 User s Guide Keysight Software End User Licensing Agreement EULA ...
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