HP 8568B, Performance Tests And Adjustments Manual, Page: 195 / 313

8. 21.4 MHz Bandwidth Filter Adjustments
33. Key in 100 200 and MARKER
[
PEAK
SEARCH].
34. Adjust LC to align makers on display. MARKER A level
should indicate 1.00 X. See Figure 3-43 for location of adjustment.
35. Repeat steps 31 through 34 until no further adjustment is
necessary.
Adjustments
36. Key in 30
[
FREQUENCY SPAN
]
100 Press
MARKER
37. Connect crystal filter bypass network between and
38. Press
(
REFERENCE LEVEL
)
and adjust DATA knob to place signal peak
two division from the top graticule line.
39. Adjust CTR to center signal on center graticule line.
Adjust SYM for best symmetry of signal. See Figure 3-44
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.
A t t e n u a t o r - B a n d w i d t h F i l t e r
Figure 3-44.
Location of 21.4 MHz Crystal Filter Adjustments
40. Remove crystal filter bypass network from between and
41. Adjust CTR to center signal on center graticule line.
Adjust SYM for best symmetry of signal. See Figure 3-44
for location of adjustments. If unable to adjust SYM
for satisfactory signal symmetry, increase or decrease value of
Refer to 3-3 for range of values.
42. Press MARKER
SEARCH
)
and MARKER
43. Key in
[
FREQUENCY SPAN
]
10
44. Key in 3 and MARKER
SEARCH
).
Adjustments 3-81