On Fri, Oct 8, 2010 at 2:54 PM, Marcus D. Leech <[email protected]> wrote: > On 10/08/2010 02:46 PM, Sharif Shaher wrote: >> Hello, >> >> We are thinking of using a 1.6GHz Intel Atom processor based PC with >> multiple gigabit Ethernet ports >> to collect data from multiple USPR2s and save that data off to disk. >> We are hoping to be able to >> use decimation rates as low as 4 for captures of shorts (16bit I and >> 16 bit Q). We will be doing >> nothing else on this PC, just capturing data. So it will host ubuntu >> and gnuradio. Does anyone have >> any idea if there is a throughput limit that we might be up against, >> say for 2 USRP2s, say 4 USRP2s. >> Has anyone successfully run gnuradio on an Atom? >> >> Thanks, >> Sharif >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> [email protected] >> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> > I run Gnu Radio on an Atom D510 system for narrow-bandwidth radiometry. > > No way in heck are you going to be able to run at 25Msps for even a > *single* USRP2, let alone multiple ones. > I tried a 25Msps usrp2_fft.py on my atom D510 system (which is > dual-core at 1.6GHz), and it couldn't keep > up. > > > > -- > Marcus Leech > Principal Investigator > Shirleys Bay Radio Astronomy Consortium > http://www.sbrac.org
I'm just going to parrot Marcus here. Nope, you are not going to be able to handle that wide a bandwidth with an Atom. I think the most I ever did was take in about 6 FM channels, channelize them, and FM demod each, and save each to a file. That's 1.2 MHz of bandwidth there with some processing. My guess, you're looking at 1.5 MHz of bandwidth with an upper limit on 2 MHz (and that's if the gods favor you). You might try to find a dual-core Atom, which still won't give you what you want, but it will be better. Tom _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
