Other topics about Analyzing Data
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)
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:
The following command is used to control whether to display the notch search result on the LCD:
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
It is able to retrieve the notch search result regardless of whether the marker display and the notch search result display is on/off.