Fluke 225C Service Manual - Page 51

External Trigger Level Test, TRIGGER OPTIONS, Update, Single Shot | Noise reject Filter, EDGE TRIG

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4 Performance Verification 4.7 External Trigger Level Test 4.7 External Trigger Level Test Proceed as follows: 1. Connect the test tool to the 5500A as shown in Figure 4-18. Figure 4-18. Test Tool Meter/Ext Input to 5500A Normal Output al55ex2w.bmp 2. Select the following test tool setup: • Reset the test tool • Press • Using select the TRIGGER OPTIONS... menu ⇒ Select On Edges... from the TRIGGER OPTIONS menu ⇒ Select Update: Single Shot | Noise reject Filter: On • Using EDGE TRIG select Ext . • Using SLOPE select positive slope triggering (trigger icon ). • Using Ext LEVEL select 1.2 V 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 top shows SINGLE MANUAL or SINGLE WAITING. If the display shows the trace, and status SINGLE HOLD then press to re-arm the test tool for a trigger. 5. Set the 5500A to source 1.7 V 6. Verify that the test tool is triggered by checking that the trace becomes visible. To repeat the test, start at step 3. 7. Set the 5500A to Standby. 4-27

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Performance Verification
4.7 External Trigger Level Test
4
4-27
4.7 External Trigger Level Test
Proceed as follows:
1.
Connect the test tool to the 5500A as shown in Figure 4-18.
al55ex2w.bmp
Figure 4-18. Test Tool Meter/Ext Input to 5500A Normal Output
2.
Select the following test tool setup:
•
Reset the test tool
•
Press
•
Using
select the
TRIGGER OPTIONS...
menu
⇒
Select
On Edges...
from the
TRIGGER OPTIONS
menu
⇒
Select
Update:
Single Shot | Noise reject Filter:
On
•
Using
EDGE TRIG
select
Ext
.
•
Using
SLOPE
select positive slope triggering (trigger icon
).
•
Using
Ext LEVEL
select
1.2 V
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 top shows
SINGLE MANUAL
or
SINGLE WAITING
.
If the display shows the
trace, and status
SINGLE HOLD
then press
to re-arm the test tool for a trigger.
5.
Set the 5500A to source 1.7 V
6.
Verify that the test tool is triggered by checking that the trace becomes visible.
To repeat the test, start at step 3.
7.
Set the 5500A to Standby.