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Section 2.2: BigIR 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 intermittent 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 correct-
ly and then finally determining 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/COIL WIRING TESTS
Open Circuit Test Table
Test Pins
Expected Resistance
Results (Ohms or Open Load
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)
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