Lets see. 10 mHz is .01Hz Do any of you remember when this mHz thing started? It happened about the same time DE9 connectors became DB9 and DA15 connectors became DB15 connectors. Also, during that time the RS232 spec did not specify a connector. Just signals, voltage levels and rise/fall times. But, long ago a pF was mmfd. OK that is milli-milli-femto-deci today oops, no units. And there was kilomegacycles for GHz. 73 Bill wa4lav