Sony Tektronix WFM 1125, Руководство по обслуживанию

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Adjustment Procedures
WFM 1125 Option 0A/0B/0C/0D Service Manual
5-9
Vertical offset: –350 mV . . . . . . . . . . . .
21. Align the –350 mV level of the signal with the center graticule on the
oscilloscope.
22. Change the oscilloscope CH2 vertical offset to 350 mV.
23. Verify and adjust the A10 R542 to align the 350 mV level with the center
graticule on the oscilloscope.
24. Change the oscilloscope CH1 vertical offset to –350 mV.
25. If the –350 mV level is within
"
0.5 division from the center graticule, go to
next step. If not, go back to step 21.
26. Press the TIMING SIGNALS button on the TSG1001 front panel to set the
TIMING SIGNALS to BOWTIE.
27. Change the oscilloscope settings to:
Waveform: CH1 and CH2 . . . . . . . . . . . . . . .
Vertical scale: 100 mV/div for CH1 . . . . . . . . . . . . .
100 mV/div for CH2
Vertical offset: 0 V for CH1 and CH2 . . . . . . . . . . . .
Horizontal scale: 1
m
s/div . . . . . . . . . . .
Record length : 5000 points . . . . . . . . . . . .
28. Press the MATH REF button on the oscilloscope front panel, and then press
the main and side menu buttons in the following order to create a Math
waveform:
Change Math waveform definition
³
Dual Wfm Math
³
Set 1st Source to
[Ch1]
³
Set operator to [–]
³
Set 2nd Source to [Ch2]
29. Change the oscilloscope settings to:
Waveform: CH1 and CH2 to Off . . . . . . . . . . . . . . .
Zoom: On . . . . . . . . . . . . . . . . . . .
Vertical scale: 100 mV/div (5.0 X Vert) for Math1 . . . . . . . . . . . . .
Horizontal Scale: 5
m
s/div (0.2X Horz) . . . . . . . . . .
30. Observe the Bowtie display on the oscilloscope and verify and adjust the
A10 DL210 so that the skew is within 1 ns (the marker on the display
indicates 1 ns).