Analyze Trace Bandwidth - Keysight E4990A Help Manual

2. Press
Marker Search
3. Enter a target value in the entry box that appears.
This causes the target search to be executed based on the target
value newly set and the transition type defined at this point.
4. Press Target Transition.
5. Selects a transition type from positive, negative or both.
This causes the target search to be executed based on the target value
set at this point and the transition type newly set.
6. Press Search Multi Target to move the marker to the target.
execute the search for the main response value of the two marker
response values.

Analyze Trace Bandwidth

Definitions of Parameters in the Trace Bandwidth Analysis
•
Define the Cutoff Point in Trace Bandwidth Analysis
•
Implement Trace Bandwidth Analysis
•
Other topics about Analysis and Processing of Result
The E4990A can automatically derive the parameters called bandwidth,
center value, Q value, peak,∆L, and ∆R from the measurement trace.
At the instant when the trace bandwidth analysis function is turned On and
at the completion of each subsequent sweep, cutoff points are searched for
on the sweep parameter value axis, starting from the main marker position
at that time and advancing in both directions. When two cutoff points are
detected, six parameters (bandwidth (width), center value (center), Q,
peak (peak), ∆L, and ∆R) are derived from the data at those points and
displayed in the Marker Statistics/Trace Bandwidth Analysis Result field on
the right of the screen.
the screen as trace bandwidth analysis results, is the first position of
the main marker itself. Therefore, before executing the trace
bandwidth analysis, use the peak search function and so on to move
the main marker to the peak on the trace as necessary. The cutoff
points are searched for according to the definition specified by the
user. The definitions of the six parameters displayed on the screen as
the final results also vary depending on the delta marker mode
selected at the time.
> Multi Target > Target Value.
When the data format is in Smith chart or polar format,
The peak (peak), one of the six parameters displayed on
Measurement
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