Hello thank you for your information. I read this product.
http://www.bb-elec.com/ But these equipment are not popular. I think photo couppler IC's are using in this box. It is same way of I2PHD's comment. best 73 JA7TDO Per-Tore Aasestrand ????????: > > > Hi, > > There are opto-isolated USB hubs available. > For example from or Black Box. > > Per-Tore > LA7NO > > At 19:42 02.01.2008, you wrote: > >> 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 >> >> >> >> >> Yahoo! Groups Links >> >> >> (Yahoo! ID required) >> >> mailto:[EMAIL PROTECTED] >> <mailto:[EMAIL PROTECTED]> >> >> >> >> >> __________ NOD32 2760 (20080102) Information __________ >> >> This message was checked by NOD32 antivirus system. >> http://www.eset.com <http://www.eset.com/> > > \\|// > /_"""_\ > |(O) (O)| > --------oOOO--(_)--OOOo--------- > | | > | Per-Tore Aasestrand | > | E-mail: [EMAIL PROTECTED] | > | Tel : +47 55 32 32 35 | > | Mobile: +47 920 444 76 | > | PO Box 1708 Nordnes | > | N-5816 BERGEN | > | Norway | > | | > -------------------------------- > > Only recycled bits have been > used in this email. > >
