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

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