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 Vector Network Analyzers Using CMT VNA Software

The peak limits test function checks whether the trace point with the minimum (or maximum) value of the measured value falls within the specified limits of the frequency range and/or value range (see figure below). If the trace point minimum (or maximum) falls within the specified limits, the test is passed (test result "pass"). Otherwise, the test is failed (test result "fail").

Peak limits 2

Peak limits test

Peak Limits Test parameter

A description of the parameters of the peak limits test function in the software is shown in the table below.

Parameter

Definition

Limit Type

Selects the type of limit (one of the limits or both at the same time). Possible values:

Stimulus — checks whether the maximum (or minimum) point of the trace is within the specified frequency bandwidth.

Response — checks whether the maximum (or minimum) point of the trace falls within the value range.

Allchecks the maximum (or minimum) trace point simultaneously within the frequency band and within the value range of the measured value.

Begin Stimulus

Lower bandwidth limit.

End Stimulus

Upper bandwidth limit.

Begin Response

Lower limit of the value range.

End Response

Upper limit of the value range.

Peak Polarity

Selects a trace point for inspection:

Positive trace maximum.

Negative trace minimum.


note

The peak limit test for the Stimulus limit type can only be performed in the frequency domain.


Peak Limits Enabling/Disabling

peak limits menu

 

 

To enable/disable peak limits test function:

Limits > Peak Limits

Then use the toggle to turn it ON/OFF.

Editing Search Parameters for Peak Limits

 

To select the limit type:

Limits > Peak Limits > Type

Then select the required type:

All

Stimulus

Response

 

To enter the lower bandwidth limit, use Limits > Peak Limits > Type: All or Type: Stimulus > Start. To enter the upper bandwidth limit, use Limits > Peak Limits > Type: All or Type: Stimulus > Stop.

To enter the lower limit of the value range, use Limits > Peak Limits > Type: All or Type: Response > Low. To enter the upper limit of the value range, use Limits > Peak Limits > Type: All or Type: Response > High.

 

To select a trace point to check, use Polarity [Negative | Positive].

Peak Limits Test Display Management

The display of the peak limits on the screen can be turned on/off.

The result of the peak limits test is indicated in the upper right corner of the diagram:

If the measurement result passed the peak limit test, the trace number and the result will be seen: Tr1: PkLim Pass.

If the measurement result failed, the result will be indicated in the following ways:

1.Tr1: PkLim Fail will be displayed in upper right corner of the diagram.

2.Fail sign will be displayed in red in the center of the window.

Rev.:  25.00