Measure Subsystem; Introduction; Measurement Setup; User-Defined - HP 54501A Programming Reference Manual

Measure Subsystem
14
Introduction
The
commands in the
MEASURE
subsystem are used to make
parametric measurements on displayed waveforms and to report the
settings of
the voltage and time markers. Some commands in
this
subsystem can be used to set the voltage and time
markers to specified
voltages, times, or events.
Measurement
Setup
To
make
a
measurement, the portion of the
waveform required for that
measurement must be displayed on the
oscilloscope. That
is:
•
For
a
period or frequency measurement,
at least one complete
cycle
must be displayed.
•
For
a
pulse width measurement, the entire pulse must be displayed.
•
For
a
risetime measurement, the leading (positive-going) edge of
the
waveform
must be displayed;
•
For
a
falltime measurement, the trailing (negative-going) edge of the
waveform
must be displayed.
Note
When
WINDOW
is
ON, measurements are
ONLY applied to
the
windowed portion of the
waveform.
User-Defined
When User-Defined Measurements are made,
the defined parameters
MeaSLJ rementS
must ^e
set
^ore
actually sending the measurement
command or
query.
In User-Defined
the
mid threshold is the mid
point between
the
upper
and lower threshold when the lower threshold
value
is less than the upper
threshold
value.
HP
54501A
Programming
Measure Subsystem
14-1