8. 21.4 MHz Bandwidth Filter Adjustments
32. Adjust
LC to align markers on display. MARKER A level
should indicate 1.00 X. See Figure 3-43 for location of adjustment.
33. Repeat steps 30 through 32 until no further adjustment is
necessary.
XTAL
34.
Key in
30
[
FREQUENCY SPAN
)
100
MARKER
35. Press
and adjust DATA knob to set signal peak
approximately 2 divisions down from top CRT graticule line.
36. Connect crystal filter bypass network between
and
37. 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.
At tenuator-Bandwidth Filter
Figure 3-44.
Location of
21.4 MHz Crystal Filter Adjustments
38. Remove crystal filter bypass network from between
and
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.
40.
Key in
10
MARKER
[
PEAK SEARCH
),
and
MARKER
41. Key in
3
and MARKER
[
PEAK SEARCH
).
42. Adjust
XTAL to align markers on display. MARKER
A level should indicate 1.00 X. See Figure 3-44 for location of
adjustment.
3-86 Adjustments
