Main Instrument
4–38
CSA8000 & TDS8000 Instruments and Sampling Modules
6. Set the synthesized output to 1600 mV peak-to-peak (800 mV displayed).
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.
Follow this procedure to make the direct trigger level accuracy check:
1. In the Meas Setup dialog box:
a. make sure the channel under test is selected in the Source menu.
b. select Meas 1, and then choose Select Meas > Amplitude > Amplitude.
2. Adjust the synthesizer signal generator level until the amplitude measure-
ment readout on the instrument screen indicates the amplitude is 800 mV.
NOTE
. A stable trigger is one that is consistent; that is, one that results in a
uniform, regular display triggered on the selected slope (positive or negative).
This display should not have its trigger point switching between opposite slopes,
nor should it roll across the screen. The following step represents approximately
180
°
phase shift. Verify that the trigger is operating (stable).
Test:
Содержание CSA8000 Series
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