On 01/15/2011 05:01 AM, Moeller wrote: > > But I would suggest an option to switch to a second input, > directly into the ADC, to cover the range DC to 10 MHz, or to attach > an external RF, IF (e.g. from an amateur radio). > Or a second board without mixer, just replacing it on the FMC connector, > similar to the USRP daughterboard system. > > Yes, I considered that, too, and it would be cheap to do. I'll update the block diagram.
> I looked at the CY7C68013 EZ-USB FX2 data sheet. > Is it true that we wouldn't need any FPGA glue logic to control > the receiver, for the frequency synthesizer, flow control etc. ? > There are lots of IO pins and busses on the FX2. > The embedded 8051 µC could be used to control the receiver. > > We'd likely need a *little* bit of "glue logic" to interface to a "smart" ADC like the AD6652, something that a little CPLD would work just fine for. > > I think for USB you don't have to deal with the protocol. > USB chips will handle this, similar to the EZ-USB. > > There aren't a lot of USB-3.0 chips out at the moment--most implementations that I can see are FPGA-based, hence the comment. But something like the EZ-FX2, but support USB-3.0 instead may emerge at some point. Don't know--anyone else have a good "view" into where USB-3.0 is going? -- Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
