HP 54540 Series - Front-Panel Overview

Automatic Pulse
Parameter
Measurements
Setup Aids
Disk Drive
Chapter 1: General Information
Operating Characteristics
The
oscilloscope
offers
28
automatic
pulse
parameter
measurements
from
the
front
panel
(shown
below)
and
over
HP-IB.
The
standard
measurements
are
performed
with
10%,
50%,
and
90%
voltage
thresholds,
as
defined
by
IEEE
standard
194-1977,
"IEEE
Standard
Pulse
Terms
and
Definitions."
Automatic measurements available on the oscilloscopes
Rise Fall Frequency Period preshoot time at max voltage
+width —width Duty cycle ATime overshoot time at min voltage
Vp-p Vimin Vmax Vavg voltage attime _ time at voltage
V amptd V base Vtop Vacrms
Vide rms
User-definable Measurement Thresholds The oscilloscope allows you to set your
own
thresholds
for
automatic
measurements.
You
can
set
both
the
upper
and
lower
thresholds
from
—25%
to
125%,
as
long
as
the
upper
threshold
value
is
always
greater
than or equal to the lower threshold. The middle threshold is always equal to the
midvalue between the upper and lower threshold.
Continuous
Measurements
You
can
turn
continuous
measurements
on
or
off.
With
continuous
measurements
off,
the
voltage
(y)
and
time
(x)
markers
are
placed
on
the
waveform
to
indicate
where
the
last
measurement
was
taken.
Measurement
Statistics
The
maximum,
minimum,
average,
standard
deviation,
and
most
recent
of
continuously
updated
measurements
are
calculated
and
displayed.
You
can select
any
three
measurements
for
simultaneous
display.
Measurement
Limit
Test
You
can
set
the
maximum
and
minimum
limits
for
any
three
of
the
front-panel
automatic
measurements.
These
continuously
updated
measurements
are
compared
to
the
maximum
and
minimum
limits.
If
the
measurements
are
outside
the
defined
limits,
you
can
store
the
waveform
in
a
memory
or
print
the
screen
on
a
hardcopy
device.
In
addition,
the
HP-IB
Service
Request
line
can
be
set
to
flag
the
controller.
You
can
set
the
measurement
limit
test
to
stop
after
test
limits
are
exceeded,
or
to
continue
testing.
Autoscale
Pressing
the
Autoscale
button
automatically
adjusts
the
vertical,
horizontal,
and
trigger
to
best
display
the
input
signals.
Autoscale
requires
a
signal
with
a
duty
cycle
greater
than
0.5%
and
a
frequency
greater
than
50
Hz.
Autoscale
is
effective
only
for
relatively
stable
input
signals.
Undo
autoscale
Undo
autoscale
returns
the
instrument
to
the
setup
previous
to
the
autoscale.
(See
Recall
0.)
Save/Recall
You
can
save
nine
front
panel
setups
(1
to
9)
in
nonvolatile
memory.
Recall
Clear
Pressing
the
Recall
key
followed
by
the
Clr
key
resets
the
oscilloscope
to
its
default
settings.
Recall
0
If
Autoscale,
ECL
or
TTL
preset,
or
recall
setup
are
inadvertently
selected,
recall
0
restores
the
instrument
to
the
previous
setup.
Show
Displays
instrument
status,
including
volts/div,
offset,
and
trigger
condition.
There
is
a
high
density,
3.5-inch,
MS-Dos®
compatible
disk
drive
on
the
front
panel.
MS-DOS® is a US registered trademark of the Microsoft Corporation.
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