Tektronix LTA7P Series, Руководство по обслуживанию

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Performance Verification: Ajustment/Verification Fixture
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
4- 33
c. Set up the Trigger menu as follows:
H
Source CH2
H
Coupling DC
H
Slope +
H
Level 700 mV
H
Mode Normal
d. Set up the Measure menu as follows:
H
Select Measurement for CH1 Measure
H
Gating On
e. Set up the Cursor menu as follows:
H
Function V Bars
f. Set up the Acquire menu as follows:
H
Acquisition Mode Average 90
H
Repetitive Signal On
4. Connect the CH2 probe of the oscilloscope to J1-2 on the adjustment/verifi-
cation fixture.
5.
Select Deskew from the Vertical menu.
NOTE
. Observe proper polarity when performing the following steps.
See Figure 4--9 on page 4--23 to identify the ground side of the components being
measured.
6. Connect the CH1 probe of the oscilloscope to the custom probe tip adapter
and measure the signal across R67.
7.
Begin the acquisition by pressing the Run/Stop button.
8. Use the large knob at the upper right of the panel to adjust delay until the
leading edges of the two waveforms coincide and the displayed value of
CH1-CH2 delay is averaged around 0.
9. Connect the CH1 probe to R127. Verify the CH1-CH2 delay is averaged
around 0 ns
±
100 ps.