Programming
1061
Bandwidth Search
• Overview
• Setting Bandwidth Definition Value
• Retrieving Bandwidth Search Results
• Sample Program
Other topics about Analyzing Data
Overview
The E5071C has a feature called Bandwidth Search. This feature searches
for the cutoff points on both right- and left-hand sides of the marker
position on the trace.
 Bandwidth (BW= high-low)
 Center frequency (cent= {high+low}/2))
 Q value (Q=cent/BW)
 Loss (response value at the marker position)
Where high is the right-hand cutoff point frequency;low is the left-hand
cutoff point frequency.
Setting Bandwidth Definition Value
Bandwidth Search finds a point whose response value is different, by the
amount defined as the bandwidth definition value, from the response value
at the marker position, and identifies that point as the cutoff point.
To set the bandwidth definition value, use the following command:
:CALC{1-36}:MARK{1-10}:BWID:THR
Retrieving Bandwidth Search Results
Once you have moved the marker to the appropriate position using Marker
Search or some other feature, you can retrieve the results of Bandwidth
Search by using the following command:
:CALC{1-36}:MARK{1-10}:BWID:DATA?
Also, you can use the following command to control whether to display the
results of Bandwidth Search on the LCD:
:CALC{1-36}:MARK:BWID
You can retrieve the results of Bandwidth Search even after you have
turned off the display of markers or the results of Bandwidth Search.
Sample Program
See Bandwidth Search.
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