HP 8568B, Performance Tests And Adjustments Manual, Page: 169 / 313

3. Preliminary Display Adjustments (SN and Above)
12. Set the oscilloscope controls as follows:
Press
Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
amplitude scale
offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..25.000 0 V
Channel 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
amplitude scale
offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..60.000 0 V
Press (TRIG):
source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 .
level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25.0000 V
Press
time scale . . . . . . . . . . . . . . . . . . . . . . . 50.0
delay . . . . . . . . . . .. . . . . . . . . . . . . .. . . . . . . . . . . . . . . 125.000 ns
Press (DISPLAY):
connect dots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..on
Press
13. Set the spectrum analyzer’s front-panel INTENSITY control fully
counterclockwise, and then set the LINE switch to ON.
14. The X+ deflection and X- deflection waveforms should be
superimposed on the oscilloscope display, as shown in Figure 3-26.
If necessary, adjust
X POSN and X GAIN
for a centered display of at least four vertical divisions. See
Figure 3-25 for the location of the adjustments.
running
- 1 2 5 . 0 0 0
1
1 0 . 0
2 5 . 0 0 V
10.00 :
4
1 0 . 0
6 0 . 0 0 v
10.00
25.00 V
Figure 3-26. X + and X- Waveforms
15. Set the oscilloscope controls as follows:
Press
f l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
display . . . . . . . . . . . .. .. .. .. .. . .. .. .. . . . . . . . . . . . . . . . . . . .. .. on
math . . . . . . . . . . . . . . . .. . . . . . . . . . . channel 1 channel 4
sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...25.0
16. Three waveforms should be displayed on the oscilloscope, as
shown in Figure 3-27. The lower composite waveform represents
Adjustments 3-55