HP HP 54600B, User'S And Service Manual

Page: 57 / 183

3
Use averaging to reduce noise on the displayed waveform.
To use averaging follow these steps.
•
Press
Display
, the press the
Average
softkey.
Notice that
Av
appears in the status line.
•
Toggle the # Average softkey to select the number of averages that best
eliminates the noise from the displayed waveform.
The
Av
initials in the status line indicates how much of the averaging
process is finished, by turning to inverse video as the oscilloscope
performs averaging. The higher the number of averages, the more
noise that is removed from the display. However, the higher the
number of averages, the slower the displayed waveform responds to
waveform changes. You need to choose between how quickly the
waveform responds to changes and how much noise there is on the
signal.
On this waveform, 256 averages were used to reduce the noise
Figure 2–22
Operating Your Oscilloscope
To reduce the random noise on a signal
2–30