Rex said the following on 01/09/2009 06:37 AM: > Maybe I lost track and missed something, but I don't think I ever saw > more on the subject of specific high-end sound cards that might be > useful for nutty measurements. > > I'd be interested to hear what any of the group has to share about > relative merits of current sound cards that can be interfaced for > measurements like what was being discussed in that earlier thread. (And > some before and since.) > > From my own point of view, I'd most like to hear about any that are > external -- connected by USB or 1394, rather than an internal card. This > makes it more portable and easier to move between different PC's.
[Shameless Plug] One very interesting possibility is the HPSDR (High Performance Software Defined Radio) boards called Ozy and Janus. Together with a passive backplane called Atlas, they provide an extremely high performance ADC/DAC that supports sampling to 192k and output via USB. The system was designed for use as the interface between a PC and an SDR and special attention was paid to low noise and flat frequency response. I am not certain, but I *think* that the inputs are DC coupled. The two boards, assembled and tested, run about $320, with a discount for TAPR members. The backplane is a fairly simple kit (lots of connector pins to solder, but not much complexity) that sells for $28, also with a discount for TAPR members. Bare boards, but not kits, for Ozy and Janus are also available for the adventurous. I'm not aware of anyone using this system for T&F work, but it has some interesting possibilities. [/Shameless Plug] John _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
