On 04/28/2010 11:17 PM, William Pretty Security Inc wrote: > > Hi All; > > > > As Marcus and others suggested I ran usrp_fft.py and dialed back the > decimation until I got overflows. > > You were correct Thomas. The minimum decimation turned out to be 8. I > also created my own usrp_fft.grc and ran it as well. > > > > I have some screen shots but they appear to be too big to post here, > so I will put them up on my web site ASAP > > and post the link ... > > > > later; > > > > Bill > > > That's a good sign. Since the USB-2.0, in default sample size across the bus, can only handle 8Msps (64Msps/8 = 8Msps).
It means that you weren't choking on CPU before you choked on USB bus bandwidth. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
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