HP 54501A - Autoscale; Setting up the Instrument

Autoscale
Setting
Up
the
Instrument
The AUTOSCALE
feature
of Hewlett-Packard
digitizing
oscilloscopes
performs
a
very
useful
function
on
unknown
waveforms
by
setting
up
the
vertical
channel,
timebase,
and
trigger
level
of
the
instrument.
The
syntax for
Autoscale
is:
:AUTOSCALE
<
terminator
>
A
typical oscilloscope
setup
would
set
the
vertical
range
and
offset
voltage,
the
horizontal
range,
delay
time,
delay
reference,
trigger
mode,
trigger level,
and
slope.
A
typical
example
of
the
commands
sent to
the
oscilloscope
are:
:CHANNEL1:RANGE
0.64;OPPSET
0.25
<
terminator
>
:TIMEBASE:RANGE
1E-6;DELAY
20E-9;MODE TRIGGERED
<
terminator
>
:TRIGGER:LEVEL
0.25;SLOPE
POSITIVE
<
terminator
>
This
example
sets
the
vertical
to
0.64
volts
full-scale
(80
mV/div)
centered
at
0.25
V.
The
horizontal time
is
1
ms
full-scale
with
20
ns
delay.
The
timebase
mode
is
set
to
triggered,
and
the
trigger
circuit
is
programmed
to
trigger
at
0.25
volts
on
a
positive
slope.
Introduction to Programming
an
Oscilloscope
1-12
HP 54501A
Programming