Tektronix CSA8000 Series, Service Manual

Page: 139 / 354

Main Instrument
CSA8000 & TDS8000 Instruments and Sampling Modules
4–35
7. Set up the CSA8000/TDS8000 as follows:
a. Select Default Setup from the Utilities menu on the menu bar at top of
display.
b. Select C1 from the Waveform Selector menu on the controls bar at the
bottom of the display (left corner).
c. In the Trig Setup dialog box:
H
select External Direct.
H
select Metastablility Reject.
H
select Auto Mode.
d. In the Vert Setup dialog box:
H
set Scale to 100 mV/division.
H
set Offset to 0.
e. In the Horz Setup dialog box:
H
set Scale to 200 ps/division.
H
set Horizontal Reference to 0%.
H
set Position to 19 ns.
H
set All Timebases Mode to Short Term Jitter.
f. In the Acq Setup dialog box, set Acquisition Mode to Average.
Follow this procedure to make the time internal accuracy check:
1. In the Meas Setup dialog box:
a. for the following measurements make sure the channel under test is
selected in the Source menu.
b. select Meas 1, and then choose Select Meas > Amplitude > Amplitude.
c. select Meas 2, and then choose Select Meas > Timing > Period.
2. Adjust the synthesizer signal generator level until the amplitude measure-
ment readout on the instrument screen indicates the amplitude is 400 mV.
3. Verify the period measurement readout indicates the period is 1 ns
"
9 ps.
4. In the Horz Setup dialog box, set All Timebases Mode to Lock to Int. 10
MHz.
Test: