Compensation Adjustments - Agilent Technologies 10400B Series User Manual

Compensation adjustments

You can adjust the probes for both low-frequency compensation and high-
frequency compensation. Low-frequency compensation is an operating
adjustment. You should perform high-frequency compensation periodically
according to maintenance schedules.
When to Adjust Probe Compensation
Low-frequency compensation is adjusted when the probe is first connected
to the oscilloscope. Probe compensation will usually hold over all the
attenuator ranges when used with a Agilent Technologies oscilloscope. If
the input capacitance of the oscilloscope changes as ranges are switched,
compensation must be adjusted each time a new range is selected.
Adjusting low-frequency compensation
Before you can have a flat frequency response when using a compensated passive
divider probe, you must compensate the probe's cable capacitance and scope
input capacitance to optimize the step response for flatness. You should
compensate your probe to match its characteristics to the oscilloscope. A poorly
compensated probe can introduce measurement errors.
Connect the probe from the appropriate oscilloscope channel to the
1
front-panel probe adjust signal terminal [
You can attach the probe with the hole in the probe body facing up to allow
adjustment.
Press Autoscale.
2
Using the wide end of the supplied screwdriver tool, set the low-
3
frequency compensation adjustment on the probe for the flattest pulse
possible as shown below.
Low-frequency compensation
adjustment
Low-Frequency Adjustment and Waveforms
Agilent 10400B Series Miniature Passive Oscilloscope Probes
Compensation adjustments
] on the scope.
Perfectly Compensated
Over Compensated
Under Compensated
15