User's Manual

123
Service Manual
4-12
• Move the Input A and Input B ground level (indicated by zero icon ) to the
center grid line. Proceed as follows:
Press
to enable the arrow keys for moving the Input A ground level.
Press
to enable the arrow keys for moving the Input B ground level.
Using the
keys move the ground level.
• Using
change the time base to select manual time base ranging, and lock
the time base on 10 ms/div.
• Press
to open the SCOPE INPUTS menu.
• Press
to open the TRIGGER menu, and choose:
INPUT: ■ A | SCREEN UPDATE: ■ FREE RUN | AUTO RANGE: ■ >15HZ
• Press to enable the arrow keys for Trigger Level and Slope adjustment.
• Using
select positive slope triggering (trigger icon ).
• Using
set the trigger level to +2 divisions from the screen center. For
positive slope triggering, the trigger level is the top of the trigger icon (
).
• Press to open the SCOPE INPUTS menu.
• Press
to open the SCOPE OPTIONS menu, and choose:
SCOPE MODE: ■ SINGLE SHOT | WAVEFORM MODE: ■ NORMAL
3. Set the 5500A to source 0.4V DC.
4. Verify that no trace is shown on the test tool display, and that the status line at the
display bottom shows
Wait:A . If the display shows the traces and status Hold:A ,
then press
to re-arm the test tool for a trigger.
5. Increase the 5500A voltage slowly in 0.1V steps, using the 5500A EDIT FIELD
function, until the test tool is triggered, and the traces are shown.
6. Verify that the 5500A voltage is between +1.5V and +2.5V when the test tool is
triggered. To repeat the test, start at step 3.
7. Set the 5500A to Standby.
8. Press
to clear the display.
9. Press
to enable the arrow keys for Trigger Level and Slope adjustment.
10. Using
select negative slope triggering ( ).
11. Using
set the trigger level to +2 divisions from the screen center. For
negative slope triggering, the trigger level is the bottom of the trigger icon (
).
12. Set the 5500A to source +3V DC.
13. Verify that no trace is shown on the test tool display, and that the status line at the
display bottom shows
Wait:A . If the display shows the traces and status Hold:A ,
then press
to re-arm the test tool for a trigger.
14. Decrease the 5500A voltage slowly in 0.1V steps, using the 5500A EDIT FIELD
function, until the test tool is triggered, and the traces are shown.