On Fri, December 18, 2015 3:38 am, Poul-Henning Kamp wrote: > A significant reason for the TADD-1 existing in the first place was to > break groundloops. This is incompatible with tying all the BNC's > together.
Assuming you mean power line frequency currents flowing between equipment, the way telecom equipment vendors solved that problem was BNC connectors which have the shells connected to the chassis contact through low inductance capacitor structures, so that the BNC shell was connected to chassis at RF frequencies, but isolated by a relatively large impedance at low multiples of 50 Hz or 60 Hz. Even in that case it is better to have the connectors on the same side so that the high frequency shield currents are not forced across the PCB. -- Chris Caudle _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.