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Re: [Discuss-gnuradio] Amount of data lost per overrun in USRP1
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] Amount of data lost per overrun in USRP1 |
Date: |
Tue, 5 May 2009 18:10:00 -0700 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Tue, May 05, 2009 at 05:40:48PM -0700, Karthik Vijayraghavan wrote:
> I am using a USRP1 to digitize 4 channels of data at a decimation of
> 32 using 2 LFRX. My computer can keep up with the digitizing for the
> most part but I get a relatively small number of overruns as well. I
> am using the trunk rev 10882 with default values for the fusb
> parameters.
>
> 1. What is the amount of data lost per overrun?
>= 1 512 byte USB packet
> 2. Is there any way to know where exactly each of the overruns occurred?
No. The usrp library code polls the FPGA about 10 times / second to
check for overruns.
Eric