User`s guide

4-10
MegaZoom Concepts and Oscilloscope Operation
To setup the Analog channels
7Press the Probe softkey to display the channel probe menu.
This menu allows you to select additional probe parameters such as attenuation
factor and units of measurement for the connected probe.
Probe Attenuation If you have an AutoProbe self-sensing probe (such as the
10073C or 10074C) connected to the analog channel, the oscilloscope will
automatically configure your probe to the correct attenuation factor. In the
previous figure, the oscilloscope has sensed an AutoProbe 10:1 probe.
If you do not have a self-sensing probe connected, press the Probe softkey and
turn the Entry knob to set the attenuation factor for the connected probe. The
attenuation factor can be set from 0.1:1 to 1000:1 in a 1-2-5 sequence.
The probe correction factor must be set properly for measurements to be made
correctly.
Probe Units Press the Units softkey to select the proper measurement unit
for the connected probe. Select Volts for a voltage probe and select Amps for a
current probe. Channel sensitivity, trigger level, measurement results, and
math functions will reflect the measurement units you have selected.
Skew (54640-series only) Turn the Entry knob to enter the amount of skew
between analog channel 1 and 2. Each analog channel can be adjusted ±100 ns
for a total of 200 ns difference.
The skew setting is not affected by pressing Autoscale. If you press the Default
Setup softkey in the Save/Recall menu, the skew value will return to zero
seconds.
When measuring time intervals in the ns range, small differences in cable length
can totally obscure the measurement. Use Skew to remove cable-delay errors
between channel 1 and channel 2.
Attenuation
factor
Measurement
units
Skew adjust
(54640-series)
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