@david_uk_22
Because the BBC or any other professional network is only concerned with broadcasting an accurate digital signal. They could care less what the effects of RF/EM noise are having in their own studio - which would be the only positive result that using quieter electrical gear would have at their point of broadcast. Anything they do to minimize this type of noise in their own space would have ZERO impact to end user. It's up to the end user to decide whether he/she wants to reduce the negative affects of ALL potential sources of electrical-based noise, including routers, switches, transformers, and power supplies. Again, I agree that their digital signal that arrives in your home is perfect - yet your overall listening experience could be improved with quieter gear - none of which alters that perfect digital signal. Make sense now?
So If all of my gear is susceptible to RF/EM noise then why is, and this is my only and original question , the gear in a professional network not susceptible to the same type of noise?
Because the BBC or any other professional network is only concerned with broadcasting an accurate digital signal. They could care less what the effects of RF/EM noise are having in their own studio - which would be the only positive result that using quieter electrical gear would have at their point of broadcast. Anything they do to minimize this type of noise in their own space would have ZERO impact to end user. It's up to the end user to decide whether he/she wants to reduce the negative affects of ALL potential sources of electrical-based noise, including routers, switches, transformers, and power supplies. Again, I agree that their digital signal that arrives in your home is perfect - yet your overall listening experience could be improved with quieter gear - none of which alters that perfect digital signal. Make sense now?