In an installation with digital and analogue processors, there are invalid readings for the output levels and for the B.E.R.
The input signals in the different channels that are to be processed are correct in both these parameters.
What should I do?
Check that the measurement has been carried out with the programming unit unplugged.
This problem is because the different circuits that compose the processor are disabled from their function and waiting to receive data from the programming unit.
The correct process consists in programming the processors, disconnecting the programmer and carrying out the relevant measurements.