HP 8568B, Performance Tests And Adjustments Manual, Page: 193 / 313

8. 21.4 MHz Bandwidth Filter Adjustments
10. Key in 1 MHz, and 1 MHz.
11. Press MARKER
SEARCH
],
MARKER
12. Key in 100 200 and MARKER
[
PEAK
SEARCH).
13. Adjust LC to align markers on display. MARKER A level
should indicate 1.00 X. See Figure 3-41 for location of adjustment.
14. Repeat steps 10 through 13 until no further adjustment is
necessary.
XTAL Adjustments
15. Press MARKER Key in 30 and
[
FREQUENCY
100
16. Press
[
REFERENCE LEVEL
)
and adjust DATA knob to set signal peak
on screen two divisions from the top graticule line.
17. Connect crystal filter bypass networks between and
and between and
18. Adjust CTR to center signal on center graticule
line. Adjust SYM for best symmetry of signal. See
Figure 3-42 for location of adjustments. If unable to adjust SYM
for satisfactory signal symmetry, increase or decrease value of
Refer to Table 3-3 for range of values.
B a n d w i d t h F i l t e r
Figure 3-42.
Location of 21.4 MHz Crystal Filter Adjustments
19. Remove crystal filter bypass network from between and
20. Adjust CTR to center signal on center graticule line.
Adjust SYM for best symmetry of signal. See Figure 3-42
for location of adjustments. If unable to adjust SYM
for satisfactory signal symmetry, increase or decrease value of
Refer to Table 3-3 for range of values.
21. Remove crystal filter bypass network from between and
Adjustments