Amount of data lost per overrun in USRP1


#1

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?
  2. Is there any way to know where exactly each of the overruns occurred?

Thanks
Karthik


#2

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

  1. 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