Tektronix P6205, Instruction Manual

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Performance Verification
4–10
P6205 Instruction Manual
3. Press SELECT CHANNEL on the sampling head to enable the
corresponding input channel.
4. Adjust the oscilloscope controls as necessary to display a
waveform similar to the one shown in Figure 4–8 below.
Figure 4–8: Aberrations waveform
5. Use the oscilloscope rise time filter capability to limit the
waveform rise time to 100 ps. Use the waveform Vertical
Description menu to set the vertical description as follows:
Filter(M1,100E-12)
NOTE
. The filter description above applies to an SD-24 sampling
head installed in the 11801B mainframe M1 plug-in compartment; if
your sampling head is installed in a different compartment, select the
corresponding mainframe designator.
6. Use the oscilloscope measurement capability to determine the
peak-to-peak amplitude of the filtered pulse. Measure, calculate,
and record (in percent) the system aberrations (abs
s
) in the first
4 ns of the waveform.
NOTE . Part one of the aberrations specification applies to the first
20 ns of the waveform. Significant aberrations are usually complete-
ly damped beyond approximately 4 ns.