Miura Kazunori wrote: > Hello, Adnan > > I have same problem of thinking schematics. > I am making SDR with USB control. > A noise arrive through a USB cable. > I think that it is necessary to insulate a PC and SDR. > But I do not yet understand the method. > Does anyone have idea? > > JA7TDO > Kazunori Miura
I had a similar problem when interfacing the SDR-X (an SDR radio that did not enter into the market) to the PC via the parallel port. A lot of noise entered the SDR through the parallel cable. The solution was that of using opto-couplers so that to not have an electrical path between the two equipments. Maybe something similar could be designed for the USB port 73 Alberto I2PHD
