Important
During the measurement, the DME/DDE must be connected. The CAS control unit does not have to be enabled. As of terminal 15, it always sends the EWS signal.
Fig. 1: Signal OK.
Bear in mind that the statement ”OK” only refers to the data line and the signal form. It cannot be determined whether the transmitted code is correct.
Fig. 2: Signal NOT OK.
The above signal indicates a fault in the DME/DDE.
Fig. 3: Signal NOT OK
The above signal indicates a wire fault or a fault in the CAS.
Fig. 4: Signal NOT OK
The above signal indicates a short circuit to positive.
Fig. 5: Signal NOT OK
The above signal indicates a short circuit to ground or an open circuit.