Basic Applications-2230 Operators
100
· ·
..
MISSING.
I
90---t--+-----+-----+--
PULSE
I
IO
---+--+----f--+---+--+----+---+---+-----,
I
0¼·
.
4998-29
Figure 6-16. Missing pulse, ACCPEAK STORE mode.
1.
Preset instrument controls
and
obtain a baseline
trace.
2.
Set the STORE/NON STORE switch to the STORE
position (button
in).
3.
Select the triggers, SEC/DIV setting,
and
storage
window (PRETRIG or POST TRIG) to display the pulse
train of interest.
4.
Select ACCPEAK STORE mode from the Menu.
If the waveform acquired is repetitive, each pulse
in
it
will show only the pulse outline. A pulse missing or
present part of the time will show a completely filled
display at the pulse location. Pulse breakdown (erratic
changes
in
amplitude or width) will also
be
displayed by
this storage mode.
MAKING NONSTORAGE MEASUREMENTS
The following procedures will enable the operator to
perform some basic measurements and familiarize the
operator with the conventional oscilloscope capabilities
of
the instrument.
AC PEAK-TO-PEAK VOLT AGE
To make a peak-to-peak voltage measurement, use the
following procedure:
NOTE
This
procedure may also be used to make voltage
measurements between any two points on
the
waveform.
1.
Preset instrument controls
and
obtain a baseline
trace.
2.
Apply the
ac
signal to either vertical-channel input
connector
and
set the VERTICAL MODE switches to
display the channel used.
6-16
3.
Set the appropriate VOL TS/DIV switch to display
about five divisions of the waveform, ensuring that the
VOL TS/DIV Variable control
is
in
the CAL detent.
4.
Adjust the A TRIGGER LEVEL control to obtain a
stable display.
5.
Adjust the A SEC/DIV switch to display several
cycles
of
the waveform.
6.
Vertically position the displayed waveform so that
the negative peak
of
the waveform coincides with one of
the horizontal graticule lines
(see
Figure 6-17, Point
A).
7.
Horizontally position the display
so
that one of the
positive peaks coincides with the center vertical graticule
line
(see
Figure 6-17, Point
B).
--
To Next Page
Loading...
Need help?
General
