Tektronix LTA7P Series, Руководство по обслуживанию

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Adjustment/Verification Fixture Adjustment
5- 20
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
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 Off
e. Set up the Cursor menu as follows:
H
Function V Bars
f. Set up the Acquire menu as follows:
H
Acquisition Mode Sample
H
Repetitive Signal On
3. Connect the CH2 probe to J1 and trigger on the rising edge of the pulse.
Connect the CH1 probe to R67 and center the rising edge on the center
horizontal graticule.
4. Connect the CH1 probe to R127 and record the difference in timing between
R67 and R127 using the vertical cursor bars on the oscilloscope.
5. Using the delay taps on delay labeled HOLD ADJ, add or subtract the
appropriate delay to ensure zero skew (
±
25 ps) between R67 and R127 (J4
CLK Out). See Note on page 5--16.
6. Connect the CH1 probe to R321 and record the difference in timing between
R67 and R321 using the vertical cursor bars on the (P6434 Setup/Hold
timing).
7. Using the delay taps on delay labeled SU/HOLD CLK ADJ. Add or subtract
the appropriate delay to ensure zero skew (
±
25 ps) between R67 and R321
(P6434 deskew CLK Out). See Note on page 5--16.
8. Verify that that J17 has a jumper installed in the HOLD position.