Oscilloscopes User's Guide

Making Measurements 5
6000 Series Oscilloscope User’s Guide 247
To measure the peak of an FFT:
1 Select FFT as the math function in the Math menu.
2 Choose Math as the source in the Quick Meas menu.
3 Choose Maximum and X at Max measurements.
Maximum units are in dB and X at Max units are in Hertz for
FFT.
X at Min
X at Min is the X axis value (usually time) at the first displayed
occurrence of the waveform Minimum, starting from the
left-side of the display. For periodic signals, the position of the
minimum may vary throughout the waveform. The X cursor
shows where the current X at Min value is being measured.
Delay and Phase Measurements
Delay
Delay measures the time difference from the selected edge on
source 1 and the selected edge on source 2 closest to the trigger
reference point at the middle threshold points on the
waveforms. Negative delay values indicate that the selected
edge of source 1 occurred after the selected edge of source 2.
Digital channel measurements
Automatic measurements Phase, and Delay are not valid for digital channels on
the mixed-signal oscilloscope or for the math FFT function. The two sources
defined in the phase and delay measurement must be turned on.
Source 1
Source 2
Delay