Tektronix CSA8000 Series, Service Manual

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Electrical Sampling Modules
CSA8000 & TDS8000 Instruments and Sampling Modules
4–65
c. In the Trig Setup dialog box set Source to Internal Clock (200 kHz).
d. In the Acq Setup dialog box:
H
set Acquisition Mode to Average, 64 samples.
H
under Stop After, check Condition and select Average Complete
from the pull down menu.
e. In the Horz Setup dialog box:
H
set Record Length to 2000 points.
H
set Scale to 2
m
s/division.
H
set Position to 0 (this will revert to a minimum non-zero value).
H
set Horizontal Reference to 0%.
f. In the Meas Setup dialog box:
H
for each measurement, make sure the channel under test is selected
in the Source menu.
H
select Meas 1, and then choose Select Meas > Amplitude > High.
H
select Meas 2, and then choose Select Meas > Amplitude > Low.
H
select Meas 3, and then choose Select Meas > Timing > Rise.
H
select Meas 3, turn on (check) Statistics (check box at bottom of
dialog box) and set Weighting to 500.
Follow this procedure to make the rise time accuracy checks:
1. Press the CLEAR DATA button on the front panel.
2. Press the RUN/STOP button on the front panel.
3. Several cycles of a pulsed waveform should be displayed.
4. In the Meas Setup dialog box for Meas3 (Rise):
a. click the HiLo tab.
b. turn off (uncheck) Track High and Track Low.
c. set High to measured High value (in the Measurement box at the right of
the display).
d. set Low to the measured Low value.
Test