Fluke 5502A, Руководство оператора

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SC300 Oscilloscope Calibration Option
Calibrate the Pulse and Frequency Response on an Oscilloscope
10
10-19
•
RANGE The softkeys toggle between two settings: “auto,” which adjusts the range
limit automatically in accordance with the voltage level, and “locked,” which sets the
available voltages to one range.
There are six range limits in Levsine mode: 10 mV, 40 mV, 100 mV, 400 mV, 1.3 V,
and 5.5 V. When set to “auto” the Calibrator uses your voltage setting to
automatically set the range limit that gives the most accurate output. When set to
“locked” the range limit stays fixed and you can decrease the voltage down to 0 V for
all range limits.
For example, if the range limit is 40 mV. If you set the 40 mV range to “auto” and
then key in 1 mV, the Calibrator will adjust the range limit to 10 mV and will output
1 mV from the 10 mV range. If you set the 40 mV range to “locked” and then key in
1 mV, the Calibrator will output 1 mV from the 40 mV range.
The default range setting is “auto,” which must be used unless you are
troubleshooting discontinuities in the vertical gain of your oscilloscope. The range
setting will always go to “auto” after you go out of Levsine mode.
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 lets you identify the frequency at
which the signal of the oscilloscope shows special behavior (e.g., changes
amplitude). 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 starting frequency. If not, key in the
starting frequency and then push

.
2. Toggle FREQ CHANGE to “sweep.” Toggle the RATE to “slow” to see a very
slow sweep over a small range.
3. Key in the end frequency and 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.
gl031i.eps
4. You can let the signal sweep through the complete range, or you can stop the sweep
if necessary to record the frequency at a certain 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 interrupt the frequency sweep by a HALT SWEEP softkey push,
the FREQ CHANGE method changes to “jump.”