There is insufficient dynamic range in any GPS signal on any ordinary
mortals GPS antenna to use more than 8 bits.
Bob
Chris Stankevitz wrote:
Dan Halperin wrote:
USRP's cfile utility cannot write my data without overruns, so I use
my own app which I have attached to this email in case anyone is
interested. I will try Juha's recorder to see if it performs better.
FWIW (maybe you've fixed the problem already), I would think that if
this is the case then you're using the cfile script wrong. Are you
using the '-s' switch (to halve the required disk bandwidth)?
Hi Dan,
Yes, I record the data as 16 bit shorts vs. 32 bit floats. At 4Msps
complex data, this provides 16 megabytes per second which is within
the capabilities of my 4 disk RAID0 array. Here are the results of
the bonnie++ benchmark which reports my drive can write at 58
megabytes per second:
Version 1.03 ------Sequential Output------
-Per Chr- --Block--
Machine Size K/sec %CP K/sec %CP
cstankevitz-lapt 4G 34335 44 58313 5
Chris
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
