Specifications

To adjust the display
When to adjust the display
The display adjustments are optional and normally do not require adjustment.
You should use this procedure only for the few cases when the display is
obviously out of adjustment.
Table 4-16
Equipment Required
Equipment Critical specifications Recommended
Model/Part
Digital multimeter Accuracy ±0.05%, 1 mV resolution HP 34401A
1
Turn off the oscilloscope and disconnect the power cord.
2
Remove the cover from the oscilloscope.
3
Reconnect the power cord and turn on the oscilloscope.
4
Connect the digital multimeter to the end of R901 closest to the fuse.
See figure on next page.
5
Adjust
+
B for
+
14.00 V.
6
Press
Print/Utility
. Press the
Self Test
Softkey, then press
the
Display
softkey.
7
Adjust V.HO (vertical hold) for vertical synchronization.
8
Set the intensity control (on the front panel) to mid-range.
9
Adjust Sub Bri (sub bright) to the lowest setting so that the half
bright blocks on the display are visible.
10
Increase the intensity control to a comfortable viewing level.
This is usually about 3/4 of its maximum range.
Service
Adjusting the Oscilloscope
4–37