Hello,
i'm newbe at Gnuradio and i started with a simple FM receiver project.
I use a USRP1 interface with a TV Rx rev3 daugtherboard and gnuradio
3.3, installed on a Ubuntu 9.04 distribution.
The CPU is a AMD X2 4800+, ramsize is 1GB.
The good news: The FM-receiver works very well.
The bad news: "uOuOuOuO"-messages
The USRP parameters are:
freq: 102,4 MHz
decimation: 256
Realtime scheduling is enabled too.
The decimation factor of 250 devides the full usb bandwith of 64MB/s to
256kB/s.
In my point of view, this should be no problem for the pc to read this
amount of data.
Nevertheless i get many of the overrun messages ("uO").
The effect of the lost messages is hearable to (of course!). I can hear
a cyclic! click.
That means, that the pc isn't able to read the USB data fast enough. But
why?
The CPU load is about 15% of each core. But gnuradio isn't listed in the
process-list. So i cannot say what load is produced by gnuradio itself.
Does anybody can give me any hint, where the problem could be?
Thank you for your help.
Matthias
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
