There is a profesional "standard" for clock distribution for computer audio interfaces. They call it a "Word Clock" and it is usually distributed over 75 ohm coax cable. It is common for a studio to have a master word clock generator and to use audio interfaces that accept an external clock. Some of these master clocks have rubidium or OCXO inside. Most can also PLL to any external clock
The trouble is that lower priced audio interfaces lack a "word clock" input and you'd need to get into something like this as a minimum to have that feature 828mk3Hy <http://www.sweetwater.com/store/detail/828mk3Hy/> So if you are going to hack a cheap consumer interface it might be a better hack to install a word clock input. At some point inside the interface there MUST be a sample rate clock running at 44.1, 48, 96, 192 kilohertz. Find then cut that trace and bring it out to a 75 ohm BNC connector. Now you have a standard pro level feature. Now when you divide down your 10Mhz lab standard divide it to "word rate" and you only need to build the divider once and you can use it with any audio interface that has word clock I/O. Yes of course you can send 14.4356MHz or whatever but that is a one time design and it will be different with every audio interface depending on whatever TTL can oscillator the engineer used. All that said. I have a "cheap" Presonus firewire audio interface that has S/PDIF input and it has the option to accept word clock over the fiber s/pdif. Many low priced interfaces can do this. Then you happen to have a quality s/pdif device around you are set. On Fri, Jul 6, 2012 at 12:05 PM, Bill Dailey <docdai...@gmail.com> wrote: > What if I post a schematic with a Lattice M4-64/32 CPLD? If you can program > this CPLD I can send the .JED file, the schematic... > > --------------------------------- > > I could probably get that done... would have to get a board made... never > done it but could probably manage...some kind of usb blaster to program > it. I presume the .jed is the code? I can solder for sure. Would I be > able to look at the code so I can learn something? > > -- > Doc > > Bill Dailey > KXØO > _______________________________________________ > 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. > -- Chris Albertson Redondo Beach, California _______________________________________________ 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.