Fluke ScopeMeter 19 B Series, Руководство по обслуживанию

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Performance Verification
4.6 Scope Input A&B Tests
4
4-17
the center of the display bottom.
Adjust the trigger delay time to 8.000 ms (
A
→
| 8.00 ms
)
•
Using set the time base on 10
μ
s/div.
4. Using move the trace to the right until the indicated trigger delay is
7.990 ms.
5. Examine the rising edge of the time marker pulse at the height of the trigger level
indicator top. Verify that the rising edge is at the second grid line from the left. The
allowed deviation is
±
3 pixels, see Figure 4-6.
6. Select the following test tool setup:
•
Using change the time base to select manual time base ranging, and lock
the time base on 10 ms/div).
•
Using move the trace to adjust the trigger delay time to 800.0
μ
s
(
A 800.0
μ
s
).
•
Using set the time base on 1
μ
s/div.
7. Set the 5500A to source a 0.8 ms time marker (MODE marker).
8. Using move the trace to the right until the indicated trigger delay is
799.0
μ
s.
9. Examine the rising edge of the time marker pulse at the vertical height of the trigger
level indicator top. Verify that the rising edge is at the second grid line from the left.
The allowed deviation is
±
3 pixels, see Figure 4-6.
190c-tb1.bmp
Figure 4-6. Time Base Verification
4.6.9 Input A Trigger Sensitivity Test
Proceed as follows to test the Input A trigger sensitivity:
1.
Connect the test tool to the 5500A as for the previous test (see Figure 4-5).
2. Select the following test tool setup:
•
Reset the test tool