HP 8568B, Performance Tests And Adjustments Manual, Page: 293 / 313

9. Impulse Bandwidth Adjustments
13. Using the DATA knob, adjust the marker down one side of
the display signal to the 7.3 point; CRT MKR A annotation
indicates 0.430 X.
I F C O N T R O L
\
1
1
Figure 4-8. Location of Bandwidth Adjustments
14. Adjust 1 MHz for MKR
A
indication of 500 while
maintaining the marker at 0.430 X using the DATA knob. Refer to
Figure 4-8 for the adjustment location.
15. Press MARKER Adjust marker to the opposite side of the
signal (CRT MKR A annotation indicate 1.00 X). There are now
two markers; one on each of the signal at the 7.3
point.
16. The CRT MKR A annotation
now
indicates the impulse bandwidth
of the 1 MHz bandwidth. The impulse bandwidth should be 1.00
MHz
MHz.
17. Key in 300
(
FREQUENCY SPAN
)
500
SEARCH
),
and If necessary, readjust by pressing
[REFERENCE LEVEL]] and using the DATA knob to place the
signal peak at the top of the graticule.
18. Press MARKER then MARKER
19. Using the DATA knob, adjust the marker down one
the
displayed
signal to the 7.3 point; CRT MKR A annotation indicates 0.430
X.
20. Adjust 300 for MKR
A
indication of 150 while
maintaining marker at 0.430 X using the data knob. Refer to
Figure 4-8 for location of adjustment.
21. Press MARKER Adjust the marker to the 7.3 point on the
opposite side of the signal (CRT MKR A annotation indicates 1.00
22. The CRT MKR A annotation now indicates the impulse bandwidth
of the 300 bandwidth. The impulse bandwidth should be
300.00
23. Key in 10
[
FREQUENCY SPAN
]
20
[
PEAK SEARCH
),
and If necessary, readjust by pressing
4-28 Option 462