Tektronix 7D20 Operator's Manual page 44

Operating Instructions- 7D20
Step 2 Adjust the HORIZ CTR (horizontal center) control to bring the left edge of
the DISPLAY CAL PATTERN in alignment with graticule line 1 of the
display as shown in Figure 2-7 (left-most graticule line is 0).
Figure 2-7. Adjust HOR12 CTR .
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Figure 2-8. Adjust HORIZ GAIN .
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Step 3
Adjust the HORIZ GAIN (horizontal gain) control to bring the right edge of
the DISPLAY CAL PATTERN into alignment with vertical graticule line 9 of
the display as shown in Figure 2-8 . These adjustments are interactive and
you may need to work back and forth between them to optimize pattern
and graticule alignment .
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