Cabling

摘要

As we reported in the 'E-Labs Inside' section of the March 2012 edition, we have been testing various cables for use with the bus. You can see the results in a YouTube video [7]. We started with a ten-core cable from the store room, which had one pair twisted. Next we tested some CAT 5e cable (four twisted pairs with an overall screen). We found cable lengths of 30 m caused no problems at all in either case, and so it seems that we do not need to recommend a specific cable. The only important aspect is that the A and B signals should be carried on a twisted pair.