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Section 4.2: Open Circuit Test (mandatory)
Step 4: Next make sure there is an open circuit between the following pins. Record your results
in the “Results” column. (Any reading < 100 K ohms is bad)
Conclusion
If your antenna passes this test it does not mean it is wired correctly. You could have an inter-
mittent short or a short that requires higher current than what the ohmmeter can supply to reveal
itself. You may have also swapped two elements or even wired the whole thing backwards
(started at the wrong end of the terminal strip) and it will still measure correctly because each
connector pair has a motor winding connected to it, but it is the wrong one. This test just takes
you to the next step of trying to determine if the antenna is wired correctly and then finally deter-
mining if the elements are physically moving. This is an open loop system and the controller has
no way of knowing if the elements are really moving when commanded to.
EHU WIRING TESTS
Open Circuit Test Table
Test Pins
Expected Resistance
Results (Ohms or Open Load
(OL))
Connector metal case to any pin Open Load (OL)
Pin 1 to any pin except 2 Open Load (OL)
Pin 3 to any pin except 4 Open Load (OL)
Pin 5 to any pin except 6 Open Load (OL)
Pin 7 to any pin except 8 Open Load (OL)
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