Fluke 225C Service Manual - Page 44

Input B Trigger Sensitivity Test, under the appropriate column of Table 4-10.

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Fluke 19xB-19xC-2x5C Service Manual 4.6.11 Input B Trigger Sensitivity Test Proceed as follows to test the Input B trigger sensitivity: 1. Connect the test tool to the 5500A as shown in Figure 4-7. Figure 4-7. 5500A Scope Output to Test Tool Input B al55scb.bmp 2. Select the following test tool setup: • Reset the test tool • Press and use to turn Input B on. • Press and use to turn Input A off. • Using move the Input B trace zero to the center grid line. • Press and use to select Input B as trigger source. • Using and change the sensitivity range to select manual sensitivity ranging, and lock the Input B sensitivity range on 2 V/div. 3. Using select the time base indicated under the first column of Table 4-10. 4. Set the 5500A to source the leveled sine wave given in the first row of Table 4-10. 5. Adjust the 5500A output voltage until the displayed trace has the amplitude indicated under the appropriate column of Table 4-10. 6. Verify that the signal is well triggered. If it is not, press , then using enable the up/down arrow keys for manual Trigger Level adjustment. Adjust the trigger level and verify that the signal will be triggered now. The trigger level is indicated by the trigger icon ( ). 7. Continue through the test points. 8. When you are finished, set the 5500A to Standby. 4-20

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Fluke 19xB-19xC-2x5C
Service Manual
4-20
4.6.11 Input B Trigger Sensitivity Test
Proceed as follows to test the Input B trigger sensitivity:
1.
Connect the test tool to the 5500A as shown in Figure 4-7.
al55scb.bmp
Figure 4-7. 5500A Scope Output to Test Tool Input B
2.
Select the following test tool setup:
•
Reset the test tool
•
Press
and use
to turn Input B on.
•
Press
and use
to turn Input A off.
•
Using
move the Input B trace zero to the center grid line.
•
Press
and use
to select Input B as trigger source.
•
Using
and
change the sensitivity range to select manual sensitivity
ranging, and lock the Input B sensitivity range on 2 V/div.
3.
Using
select the time base indicated under the first column of Table 4-10.
4.
Set the 5500A to source the leveled sine wave given in the first row of Table 4-10.
5.
Adjust the 5500A output voltage until the displayed trace has the amplitude indicated
under the appropriate column of Table 4-10.
6.
Verify that the signal is well triggered.
If it is not, press
, then using
enable the up/down arrow keys for manual
Trigger Level adjustment.
Adjust the trigger level and verify that the signal will be
triggered now.
The trigger level is indicated by the trigger icon (
).
7.
Continue through the test points.
8.
When you are finished, set the 5500A to Standby.