HP 54645A - Page 174

Voltage Measurements
Voltage measurements do not work on digital channels on HP 54645D.
1
Connect a signal to the oscilloscope and obtain a stable display.
2
Press
Voltage
.
A softkey menu appears with voltage measurement choices.
Source
selects a channel for the voltage measurement.
Voltage Measurements
include peak-to-peak (V
p-p)
, average (V
avg)
,
and root mean square (V
rms)
. Measurements are determined by
voltage histograms of the signal.
Clear Meas
(clear measurement) erases any measurement results
from the display, and removes the horizontal and vertical cursors from
the display.
Next Menu
displays the next softkey menu with additional voltage
measurement choices.
3
Press the
V top
softkey.
The oscilloscope automatically measures the top voltage and displays the
result on the screen.
Automatic Measurements
The oscilloscope makes automatic measurements on the first displayed event.
The following figure shows how to use delayed sweep to isolate a pulse for a
V
top
measurement.
Making Measurements with HP 54645A/D Oscilloscopes
To make voltage measurements automatically
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