Hi
> On Aug 5, 2015, at 11:27 PM, Donald <donvuko...@gmail.com> wrote: > > On 8/5/2015 7:55 PM, Bob Camp wrote: >> Hi >> >> Analog Devices has some very nice ADC’s that are directly targeted at >> doing this general sort of thing. They do not have any “odd” filtering >> approach >> that creates issues. Some of the early 192 KHz audio parts did not do very >> well >> past 1/4 the clock rate. > What type of FFT horse power would be needed at 192 Khz ? A ~$30 FPGA card plus an MCU would be massive overkill. It would also be fairly easy to do. A similarly priced ARM board from any of a dozen outfits *might* do the trick. I’d do it with: Analog Devices ADC as a front end clocked at ~ 240 KHz FPGA board to decimate and filter the ADC samples ARM board to do the time code -> OCXO stuff and user display. Could you get away without this or that? Who knows. There isn’t enough cost in any of those “chunks” to really matter compared to the months of effort this would take. If I was going to do the front end with what I have sitting here, I’d probably use the AD7660 clocked at 1.5 MHz (15 / 10 out of the KS box) or one of it’s slower cousins clocked some other way. Bob > > _______________________________________________ > 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. _______________________________________________ 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.
