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Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide 85
For some active probes (such as InfiniiMax probes), the oscilloscope can
accurately calibrate its analog channels for the probe. When you connect a
probe that can be calibrated, the Calibrate Probe softkey appears (and the probe
attenuation softkey may change). See “To calibrate a probe" on page 86.
See Also • “To specify the channel units" on page 85
• “To specify the probe attenuation" on page 85
• “To specify the probe skew" on page 86
To specify the channel units
1 Press the probe's associated channel key.
2 In the Channel Menu, press Probe.
3 In the Channel Probe Menu, press Units; then, select:
• Volts — for a voltage probe.
• Amps — for a current probe.
Channel sensitivity, trigger level, measurement results, and math functions will
reflect the measurement units you have selected.
To specify the probe attenuation
This is set automatically if the oscilloscope can identify the connected probe. See
Analog channel inputs (see page 43).
The probe attenuation factor must be set properly for accurate measurement
results.
If you connect a probe that is not automatically identified by the oscilloscope, you
can manually set the attenuation factor as follows:
1 Press the channel key.
2 Press the Probe softkey until you have selected how you want to specify the
attenuation factor, choosing either Ratio or Decibels.
3 Turn the Entry knob to set the attenuation factor for the connected probe.
When measuring voltage values, the attenuation factor can be set from 0.001:1 to
10000:1 in a 1-2-5 sequence.
When measuring current values with a current probe, the attenuation factor can
be set from 10 V/A to 0.0001 V/A.
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