190 Series III
Service Manual
28
External Trigger Level Test
Note
The external trigger level test is for the models 190-062, 190-102, 190-202, 190M-2,
and 190-502.
To test the external trigger level:
1. Connect the Test Tool to the 5502A. See
.
Figure 10. Test Tool Meter/Ext Input to 5502A Normal Output
2. Reset the Test Tool to select the Test Tool setup.
3. Press
T
.
4. Use
4
to select the
TRIGGER OPTIONS...
menu.
5. Select
On Edges...
from the TRIGGER OPTIONS menu.
6. Press
E
.
7. Select
Update: Single Shot
E
,
Trigger Filter: Noise Reject
E
,
NCycle: Off
E
.
8. Use
1
(EDGE TRIG) to select Ext.
9. Use
2
(SLOPE) to select positive slope triggering (
).
10. Use 3 (Ext LEVEL) to select
1.2 V
.
11. Set the 5502A to source
0.4 V dc
.
12. Verify that no trace is shown on the Test Tool display and that the status line at the display
top shows
SINGLE MANUAL
or
SINGLE WAITING
.
If the display shows the trace and status as
SINGLE HOLD
, press
H
to re-arm the Test
Tool for a trigger.
13. Set the 5502A to source
1.7 V
.
14. To verify that the Test Tool is triggered, check that the trace becomes visible. To repeat
the test, start at step 3.
Set the 5502A to Standby.
NORMAL
SCOPE
FLUKE 5502A CALIBRATOR
A
B
METER
2 CHAN. + METER
USE STACKABLE TEST LEADS
AS SUPPLIED WITH CALIBRATOR