HP 8566B Adjustment Manual page 175

2. High-Voltage Adjustment (SN 3001A and Below)
stabilize and the CRT to normalize. This so$ turn-on will extend
CRT life expectancy, particularly if a new CRT has just been
installed.
17. Readjust AlA6R32 HV ADJ for a DVM indication equal to the
voltage determined in step 15.
18. If a new CRT has just been installed do the following:
a. Set the front-panel INTENSITY control so the CRT trace is
barely visible.
b. Wait an additional 30 minutes for the CRT to normalize.
c. Readjust AlA6R32 HV ADJ for a DVM indication equal to the
voltage determined in step 15.
19. Set the spectrum analyzer LINE switch to STANDBY. Remove the
ac line cord from each instrument section.
20. Wait at least one minute for the MAINS power-on indicator
21. Disconnect the high-voltage probe from AlA3TP3.
22. Remove the A3A2 Intensity Control Assembly from
Section and install in its place the Display Adjustment Board,
HP part number 85662-60088. Set the switch on the Display
Adjustment Board in the "down" position. (This applies
approximately +2.7 V
23. Connect a calibrated 1O:l divider probe to the oscilloscope
Channel 1 input.
24. On the oscilloscope, press CRECALL) [ml to perform a soft reset.
channel 1, and use the front-panel knob to select a 10: 1 probe.
26. Set the oscilloscope controls as follows:
Press (CHAN):
Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .on
amplitude scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . lO.OV/div
offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..6O.OOOOV
coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..dc
Press @iKXiZj+:
time scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..5O~s/div
Press ITRIG):
EDGE TRIGGER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . auto, edge
source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..l
level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75.0000 V, rising edge
Press (DISPLAY):
connect dots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..on
27. On the oscilloscope press m.
28. Connect the oscilloscope channel 1 probe to AlA3TP5 using a long
probe extension. See Figure 3-7 for the location of AlA3TP5.
29. Reconnect the ac line cords to each instrument section. Adjust
the front-panel INTENSITY control fully counter-clockwise, and
dc
to the front-panel INTENSITY control.)
the IF-Display
Adjustments 3-35