Location Of A4A4 21.4 Mhz Crystal Filter Adjustments - HP 8566B Adjustment Manual

8. 21.4 MHz Bandwidth Filter Adjustments
Key in [RESBW) 100 kHz, C-SPAN) 200 kHz and MARKER
11.
12. Adjust A4A4R43 LC to align markers on display. MARKER A level
should indicate 1.00 X. See Figure 3-41 for location of adjustment.
Repeat steps 10 through 12 until no further adjustment is
13.
necessary.
Key in MARKER
1 4 .
[
15. Press
REFERENCE LEVEL
approximately 2 divisions down from the top CRT graticule line.
16. Connect crystal filter bypass networks between A4A4TPl and
Adjust A4A4C20 CTR to center signal on center graticule
17.
line. Adjust A4A4C9 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

Location of A4A4 21.4 MHz Crystal Filter Adjustments

18. Remove crystal filter bypass network from between A4A4TP4 and
Adjust A4A4C74 CTR to center signal on center graticule line.
19.
Adjust A4A4C39 SYM for best symmetry of signal. See Figure 3-42
for location of adjustments. If unable to adjust A4A4C39 SYM
for satisfactory signal symmetry, increase or decrease value of
20. Remove crystal filter bypass network from between A4A4TPl and
21. Adjust A4A4C73 CTR to center signal on center graticule line.
Adjust A4A4C65 SYM for best symmetry of signal. See Figure 3-42
for location of adjustments. If unable to adjust A4A4C65 SYM
[
30 kHz and
]
and adjust DATA knob to set signal peak
Figure 3-42.
100
FREQUENCY