Agilent Technologies 54622A User Manual page 193

Making Measurements
Making time measurements automatically
X at Max
X at Max is the X axis value (usually time) at the first displayed occurrence of
the waveform Maximum, starting from the left-side of the display. For periodic
signals, the position of the maximum may vary throughout the waveform. The
X cursor shows where the current X at Max value is being measured.
To measure the peak of an FFT:
a Select FFT as the math function in the Math menu.
b Choose Math as the source in the Quick Meas menu.
c Choose Maximum and X at Max measurements.
Maximum units are in dB and X at Max units are in Hertz for FFT.
Isolating an event to frequency measurement
The following figure shows how to use delayed sweep to isolate an event for a
frequency measurement. If the measurement is not possible in the delayed time
base mode, then the main time base is used. If the waveform is clipped, it may
not be possible to make the measurement.
Isolating event for Frequency measurement
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