SC600 Oscilloscope Calibration Option
Calibrate the Pulse and Frequency Response on an Oscilloscope
9
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The default range setting is “auto” which must always be used unless you are
troubleshooting discontinuities in your oscilloscope’s vertical gain. The range setting
will go to “auto” after you are out of levsine mode.
•
MODE
Shows that you are in levsine mode. Use the softkey to change modes and
open the related menus for the other four calibration modes.
Sweep Through a Frequency Range
When you change frequencies with the sweep method, the output sine wave sweeps
through a specified range of frequencies. This feature lets you identify the frequency at
which the oscilloscope’s signal shows special behavior. You can quickly see the
frequency response of the oscilloscope. Before you start this procedure, make sure you
are in the MORE OPTIONS menu and the sine wave is shown on the oscilloscope.
Do the subsequent procedure to sweep through frequencies:
1.
Make sure the output signal shows the frequency you will start with. If not, key in
that frequency and push
.
2.
Toggle FREQ CHANGE to “sweep.” Toggle the RATE to “100 kHz” if you want to
observe a very slow sweep over a small range.
3.
Key in the end frequency; then push
. After you push
, the signal
sweeps through frequencies between the two values you recorded, and the Sweep
menu shows on the Control Display as shown below.
4.
You can let the signal sweep through the full range, or you can stop the sweep if
necessary to record the frequency at a specified point.
To interrupt the sweep, push the softkey below HALT SWEEP. The current
frequency will show on the Output Display and the MORE OPTIONS menu will
show again on the Control Display.
Note
When you push HALT SWEEP and interrupt the frequency sweep, the
FREQ CHANGE method changes to “jump.”
5.
Do the procedure again if necessary. For example, if you did a fast sweep, you can
pinpoint a specified frequency with a slow sweep over a subset of your previous
frequency range.
Frequency Response Calibration Procedure for an Oscilloscope
This sample procedure, which verifies the frequency response on your oscilloscope, is
usually done after the pulse response is verified.
This procedure examines the bandwidth by finding the frequency at the -3 dB point for
your oscilloscope. The reference sine wave in this procedure has an amplitude of
6 divisions, so that the -3 dB point can be found when the amplitude drops to
4.2 divisions.
Before you start this example procedure, verify that you are have the oscilloscope option
in Levsine mode. If you are, the Control Display shows the subsequent menu, see below.
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