Probing the Device Under Test 2
InfiniiVision 7000B Series Oscilloscopes User’s Guide 57
Calibrating Probes
Some probes, such as the 10073C, 10074C, and 1165A passive probes, do
not require calibration. When one of these probes is connected, the
Calibrate Probe softkey in the Channel Probe Menu is grayed-out (displayed
in faint text).
However, for certain 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 in the Channel Probe Menu becomes active. To calibrate one of
these probes:
1 First, plug your probe into one of the oscilloscope channels.
This could be, for example, an InfiniiMax probe amplifier/probe head
with attenuators attached.
2 Connect the probe to the Probe Comp terminal, and the probe ground
to the Probe Comp ground terminal.
3 Press the Channel on/off key to turn the channel on (if the channel is
off).
4 In the Channel Menu, press the Probe softkey.
5 In the Channel Probe Menu, the second softkey from the left is for
specifying your probe head (and attenuation). Repeatedly press this
softkey until the probe head selection matches the attenuator you are
using.
When calibrating a differential probe, connect the positive lead to the Probe Comp terminal
and the negative lead to the Probe Comp ground terminal. You may need to connect an
alligator clip to the ground lug to allow a differential probe to span between the Probe Comp
test point and ground. A good ground connection ensures the most accurate probe
calibration.
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