Adjustment Procedures
Adjustment
Instructions
5-4
The following instructions will guide you through each of the adjustments
outlined
in
Complete Adjustments. Each adjustment section lists all neces-
sary equipment required to perform the adjustments.
CRT Adjustments
Equipment Required: One time marker generator (item 9), one precision
coaxial cable (item 5), and one 50 0 termination (item
3).
Adjustment Locations: This procedure requires adjustments to the Display
Driver board. See Figures 5-14 and 5-15 on pages 5-18 and 5-19 for the
location of the adjustments.
1 . Disconnect
all signal inputs from the oscilloscope.
2.
Display channel
1,
turning
all
others off.
3.
Press the AUTOSET button.
4.
Set the volts/div scale
to
50
mY.
5.
Set the sec/div scale to 2
I1s.
6.
Press the VERTICAL MENU button and make the following selections
from the menu:
• Set CPLG to GND
• Set BW
to
20
MHz
7.
Position the channel 1 trace to the center horizontal graticule line and
adjust the
FOCUS control for a well-defined display.
8.
Adjust the TRACE ROTATION control (screw-driver adjustment) to align
the trace with the center horizontal graticule line.
9.
Press the HORIZONTAL MENU button and set XV to On.
10. Set the INTENSITY control fully counterclockwise (off).
11. Adjust
R322
on the Display Driver board until the dot
is
visible, then
re-adjust R322
until the
dot
just extinguishes.
12. Set
XV
to Off.
13. Connect the output of the time mark generator
to
the
CH
1 input as
shown
in
Figure
5-2.
Adjustment
•
•
•
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