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Figure 23. Comparison from database
When the
“
Auto Test
”
checkbox is checked, it switches to auto-test mode. From which point the test is
desired, that point is selected by clicking on the list. Testing can now begin. When measuring with a probe
on the real board, in the coordinate shown on the board image, impedance curves are compared by the
algorithm. Both impedances can be observed on the chart. In addition, the impedance difference between
the two data is also seen as a percentage at the top of the graph. If this value does not exceed the
tolerance limit, the test passes, an audible warning sounds and a green frame is formed around the graph
(Figure 24). Upon termination of the measurement, the next point is automatically moved. If the
impedance difference exceeds the tolerance limit, the test fails and the color of the frame around the graph
becomes red, giving a warning with a different tone. In this case, the next point is not automatically passed.
In this case, the next point is not automatically moved. Clicking on the
“>>>”
button moves to the next
point. When the test is terminated or finished, the
“
Report Test
”
button becomes active. Clicking on it
generates the report of the test. You can find the details of the test steps in this file in pdf format.
Figure 24. Auto-test mode
There may be some differences in the impedance curves caused by the production of electronic materials.
Therefore, comparisons are made within tolerance. Another important factor affecting the impedance is
the probe impedance. The same probes should be used when creating a database and testing afterwards.
The difference in probe impedance can affect the curve. Also, in the database test, the GND point of the
board should be the same as the reference point when creating it.
