Measuring or estimating Bit Error Rate (BER) of 2x Ronja Metropolis.

Half duplex reduction

If all your AUI network cards are full duplex, skip this box.

To test with AUI cards that are not full duplex, you need Half Duplex Reduction. Connect the reduction between the 2 cards and AUI Forte and remember which network card is Transmit (T mark on reduction) and which Receive (R mark).

Bertest

If you have Linux where C programs can be compiled, then perform the Bertest variant.

ronjaping

If you have POSIX OS where C programs can be compiled, then perform the ronjaping variant.

ping

Otherwise perform the ping variant.

Evaluation

BER should be under 10^-9. If it's worse, then something is wrong with the electronics.