Agilent Technologies E5071C Manual page 835

E5071C
Notch Search
Overview
•
Setting the notch definition value
•
Displaying the notch search result
•
Reading out the notch search result
•
Other topics about Analyzing Data
Overview
The notch search function is used to obtain the bandwidth, center
frequency, cutoff points (high-frequency side and low-frequency side), Q
and insertion loss of a trace based on the active marker position. The notch
search function starts at the left side of the active marker position, and
ends when points that meet the condition are found.
Bandwidth (BW = high – low)
•
Center frequency (cent = (high +low)/2)
•
Q value (Q = cent/BW)
•
Loss (response value at marker position)
•
Where, high is the right-hand cutoff point frequency, and low is the left-
hand cutoff point frequency.
For more information on notch search, see Determining the
•
bandwidth of a trace (Notch Search)
Setting the notch definition value
The notch search function finds a point whose response value is different,
by the amount defined as the notch definition value, than the response
value at the marker position, and identifies that point as the cutoff point.
To set the notch definition value, use the following command:
:CALC{Ch}:MARK{1-10}:NOTC:THR
Displaying the notch search result
The following command is used to control whether to display the notch
search result on the LCD:
:CALC{Ch}:MARK:NOTC
Reading out the notch search result
Once the marker is moved to an appropriate position using the marker
search function or some other function, it is able to retrieve the notch
search result using the following command:
:CALC{Ch}:MARK{1-10}:NOTC:DATA
1062