Agilent Technologies N9913A User Manual page 181

Press Enter and four markers are automatically created to find the first negative
or positive bandpass over the displayed frequency range.
Bandwidth Search can be used ONLY with Log Mag display format.
The following six values are displayed for Bandwidth Search:
 BW: Width of the filter. (marker 2 freq) minus (marker 3 freq).
 Center: Marker 4 frequency. Mathematical midpoint between marker 2 and
 Q: Center Frequency / Bandwidth.
 Loss: Marker 1 amplitude.
 Left: Frequency of marker 2 or 3 (to left of marker 1).
 Right: Frequency of marker 2 or 3 (to right of marker 1).
 Press Back to return to the previous menu.
Press
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The following applies to DTF Measurements ONLY:

Data Analysis Features
S11 of the same filter with same search criteria: -3 dB.
The same values would result from a search criteria of approximately +30.4 dB.
marker 3.
Peak Search then choose from the following:
Moves the active marker to the HIGHEST amplitude data point of the
Peak
trace. Peak Excursion value is ignored. In SA Mode, the LO feed-through signal
(0 Hz) is also ignored.
Moves the active marker to the next highest amplitude peak from
Next Peak
where it currently resides.
Moves the active marker to the next data point to the left that meets
Peak Left
the 'Peak' criteria. When no data points to the left meet the 'Peak' criteria, the
marker does not move.
Moves the active marker to the next data point to the right that
Peak Right
meets the 'Peak' criteria. When no data points to the right meet the 'Peak'
criteria, the marker does not move.
then:
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