HP 8568B, Performance Tests And Adjustments Manual, Page: 294 / 313

9. Impulse Bandwidth Adjustments
[
REFERENCE LEVEL
]
and using the DATA knob to place the signal
peak near the top of the graticule.
24. Press MARKER then MARKER (al.
25. Using the DATA knob, adjust the marker down one side of
the displayed signal to
the
7.3 point; CRT MKR annotation
indicates 0.430 X.
26. Adjust 10 for MKR A indication of 5.00 while
maintaining the marker at 0.430 X using the DATA knob. Refer to
Figure 4-8 for the adjustment location.
27. Press MARKER Adjust the marker to the 7.3 point on the
opposite side of the signal (CRT MKR A annotation indicates 1.00
28. The CRT MKR
A
annotation now indicates the impulse bandwidth
of the 10 bandwidth. The impulse bandwidth should be 10.0
fl.O
29. Key in
3
[
FREQUENCY SPAN
]
5
[
PEAK SEARCH
),
and
If necessary, readjust by pressing
[
REFERENCE LEVEL
)
and using the DATA knob to place the signal peak near the top of
the graticule.
30. Press MARKER and MARKER
31. Using the DATA knob, adjust the marker down one side of
the
displayed signal to the 7.3 point; CRT MKR A annotation
indicates 0.430 X.
32. Adjust 3 for MKR
A
indication of 1.5 while
maintaining the marker at 0.430 X using the DATA knob. Refer to
Figure 4-8 for the adjustment location.
33. Press MARKER In]. Adjust the marker to the 7.3 point on the
opposite side of
the
signal (CRT MKR
A
annotation indicates 1.00
34. The CRT MKR annotation now indicates the impulse
bandwidth of the 3 bandwidth. The impulse bandwidth
should be 3.00
Option 462 4-29