HP 54501A - Estart

ESTArt
ESTArt
command/query
The
:MEASURE:ESTART
command
causes
the
instrument to
position
the
start
marker
on
the
specified
edge
and
slope
of
the
displayed
waveform.
All edges
must
be
displayed
and
are
counted from
the
left
edge
of
the
display.
The
start
marker
is
positioned
where
VMarker
1
intersects
the
waveform.
The
desired
edge
is
specified
by
sending
an
integer
value
after the
command
name.
If
a
positive integer
is
sent,
the
oscilloscope
will place
the
start
marker
on
a positive-going
waveform
edge.
If
a
negative integer
is
sent,
the
start
marker
will
be
placed
on
a
negative-going
waveform
edge.
If
VMarker
1
does
not
intersect
the
waveform
as
specified,
the
error
message
"Edges
required
not
found"
is
displayed.
The ESTART
query
returns
the
currently
specified
edge.
Note
The
short
form
of
this
command
does
not
follow
the
defined
convention.
The
short
form
"EST"
is
the
same
for
ESTART
and
ESTOP,
so
be
careful
not
to send
this
form for
the
ESTART
command.
Sending "EST'
will
produce
an error.
Command
Syntax:
:MEASure:ESTArt
<edge>
Where:
<edge
>
::
=
-127
to
127
excluding
0 (if
a
positive
value
is
sent
the
+
sign
may
be
omitted
or
a
space
may
be
used)
Example:
OUTPUT
707;":MEASURE:ESTART
2"
This
example places
the
start
marker
at
the
second
displayed
positive-going
intersection
of
the
waveform
and
VMarker 1.
Measure
Subsystem
14-20
HP
54501A
Programming