Please enable JavaScript to view this site.

 Network Analyzers using PXI software

Peak search function is used to determine the peak value of the measured parameter and move the marker to this position on the trace.

Peak is a local extreme of the trace.

Peak is considered positive if the value of the peak is greater than the values of the adjacent points (See figure below).

Positive peaks

Positive peaks

Peak is considered negative if the value of the peak is smaller than the values of the adjacent points (See figure below).

Positive and negative peaks

Negative peaks

Peak excursion is the smallest of the absolute differences between the response values in the peak point and the two adjoining peaks of the opposite polarity.

The peak search is executed only for the peaks meeting the following conditions:

The peaks must have the polarity (positive, negative, or both) specified by the user.

The peaks must have a peak deviation no less than the value assigned by the user.

The following options for the peak search are available:

search for nearest peak

search for greatest peak

search for left peak

search for right peak

The nearest peak is a peak that is located most near to the current position of the marker along the stimulus axis.

The greatest peak is a peak with maximum or minimum value, depending on the current polarity settings of the peak.


note

Finding the greatest peak is different form finding the maximum or minimum, as the peak cannot be located at the trace’s limit points, even if those points have a maximum or minimum value.


Peak polarity Positive

Positive negative both

To set the polarity of the peak, use the following softkeys:

Markers > Marker Search > Peak > Peak Polarity > [ Positive | Negative | Both ]

 

Search Peak marker 1

Peak Excursion 1 dB

To enter the peak excursion value, use the following softkeys:

Markers > Marker Search > Peak > Peak Excursion

Then enter the value using the numerical keypad, or the «↑», «↓» arrows.

 

Search Peak softkey

To activate the nearest peak search, use the following softkeys:

Markers > Marker Search > Peak > Search Peak

Search Max Peak softkey

To activate the greatest peak search, use the following softkeys:

Markers > Marker Search > Peak > Search Max Peak

Search Peak Left softkey

To activate the left peak search, use the following softkeys:

Markers > Marker Search > Peak > Search Peak Left

Search Peak Right softkey

To activate the left peak search, use the following softkeys:

Markers > Marker Search > Peak > Search Peak Right

 

 

 


note

Activate the marker before starting maximum or minimum search (see Marker Activation).

In Smith chart and Polar formats, the search is executed for the first marker value.


 

Rev.:  22.3