HP 8568B scale, V/div, scale, V/div, level, delay, Press, offset, offset, source, amplitude, amplitude, 125.000 ns, 50.0 ns/div, Press ISHOW], Press [CHAN]:

3.Preliminary Display Adjustments (SN 3004A and Above)

12.Set the oscilloscope controls as follows:

Press [CHAN]:
Channel 1 . . . . . . . . . . . . . . . . . .		. . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . on
amplitude	scale ......................................		10.0 V/div
offset . . .	. . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . ..25.000 0 V
Channel 4 . . . . . . . . . . . . . . . . . .		. . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . on
amplitude	scale ......................................		10.0 V/div
offset . . .	. . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . ..60.000 0 V
Press (TRIG):
source . .	. . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . 1 .
level . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		25.0000 V
Press [TIME):
time scale . . . . . . . . . . . . . . . . .		. . . . . . .._....__..........	50.0 ns/div
delay . . .	. . . . . . . .. . . . . . .	. . . . . . .. . . . . . . . . . . . . . .	125.000 ns
Press (DISPLAY):
connect dots . . . . . . . . . . . . . . . . .		. . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . ..on
Press ISHOW].

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 AlA2R227 X POSN and AlA2R220 X GAIN for a centered display of at least four vertical divisions. See Figure 3-25 for the location of the adjustments.

hf r u n n i n g

1 1 0 . 0 V/div offset: 2 5 . 0 0 V

10.00 : I dc

4 1 0 . 0 V/div offset: 6 0 . 0 0 v

10.00 : I dc

8..

- 1 2 5 . 0 0 0 ns

1 f 25.00 V

Figure 3-26. X + and X- Waveforms15. Set the oscilloscope controls as follows:

Press [WFORM MATH):

f l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..on display . . . . . . . . . . . .. .. .. .. .. . .. .. .. . . . . . . . . . . . . . . . . . . .. .. on math . . . . . . . . . . . . . . . .. . . . . . . . . . . channel 1 - channel 4 sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...25.0 Vldiv

16.Three waveforms should be displayed on the oscilloscope, as shown in Figure 3-27. The lower composite waveform represents

Adjustments 3-55