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Chapter 6 207
Analog Measurements - Screens and Control Fields
Control Fields for Analog Measurements
Normalize
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-B displays the difference between the trace saved using Save B
and the currently displayed trace. The comparison can yield either
losses or gains in amplitude.
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 (on the Main controls
menu) 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 B or A-B functions.
Screens on which this field is displayed
SPEC ANL: auxiliary controls menu
Norm/Delta
This field selects which marker will be controlled by the marker
positioning fields on the spectrum analyzer’s Marker menu.
See “Using the Spectrum Analyzer’s Delta Markers” on page 113.
Screens on which this field is displayed
SPEC ANL: marker controls menu