Chapter 4, Description of Fields

Fields

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This field is displayed when the Controls field is set to Auxiliary. This area performs three display operations:

Save B saves the currently-displayed trace for the A-B operation.

A only provides a continuously-updated display (the “normal” mode of operation).

A-Bdisplays the difference between the trace saved using Save B and the currently- displayed trace. The comparison can yield either losses or gains in amplitude.

GPIB Example

“DISP CSP;CSP:TRACE:NORM ‘A only’”

Operating Considerations

The A-B function works correctly only if the Center Frequency and Span settings are the same for both signals.

The reference level (Ref Level) can be changed to move the trace below the top line of the display if the A-B function results in a gain.

The HOLD key can be used to “freeze” the display at any time. This allows you to view a trace before performing the Save or A-B functions.

Screens Where Field is Present

CDMA REVERSE CHANNEL SPECTRUM

SPECTRUM ANALYZER

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