Input A Trigger Sensitivity Test - Fluke ScopeMeter 190-202 Service Manual

3. Select the Test Tool setup:
a) Reset the Test Tool.
mV
b) Use
RANGE
sensitivity range to 5 V/div (10:1 probe) or 500 mV/div (probe A factor is
1:1).
s TIME
c) Use
ranging and lock the time base on 10 ms/div).
MOVE
d) Use
shifted across the left hand border of the display, going off display, the
trigger delay time with respect to the first vertical grid line will be indicated
in the lower right of the display, see Figure 4-7.
Adjust the trigger delay time to 8.000 ms (
s TIME
e) Use
MOVE
4. Use
is 7.940 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 center grid line. The
allowed deviation is ±3 pixels, see Figure 4-7.

Input A Trigger Sensitivity Test

Proceed as follows to test the Input A trigger sensitivity:
1. Connect the Test Tool to the 5502A as shown in Figure 4-6.
2. Reset the Test Tool to select the Test Tool setup.
mV
3. Use and
RANGE
sensitivity ranging, and lock the Input A sensitivity range on 2 V/div.
4. Use
s TIME ns
Table 4-9.
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RANGE
and to select manual vertical ranging, and set the Input A
V
ns
to change the time base to select manual time base
to move the trace to the left. Once the trigger point is
ns to set the time base on 10 μs/div.
to move the trace to the right until the indicated trigger delay
Figure 4-7. Time Base Verification
RANGE
to change the sensitivity range to select manual
V
to select the time base indicated under the second column of
Performance Verification
Scope Input A, B, C, D Tests
).
→| 8.00 ms
A
4
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