Wireshark issue

Hi,

I am relatively new to GNU Radio. I set up a simple experiment of
connecting a
file source directly to the usrp sink and monitoring the traffic on the
ethernet
port using wireshark. The source file simply contains the letters abc.
When I
ran the flowgraph in GRC it did seem to initiate traffic on the ethernet
interface to the USRP but I could not find the string abc in any
ethernet frame.
I thought that since there is no modulation or any other manipulation of
the
source data in the flowgraph before the usrp that I would be able to
find this
data string in the ethernet frame. Is there anything the USRP sink block
could
be doing on the host side that would alter the data before it gets sent
out over
ethernet interface to the USRP?

Thanks,
Dave

On 07/30/2010 10:41 AM, David B. wrote:

doing on the host side that would alter the data before it gets sent out
over ethernet interface to the USRP?
Thanks,
Dave

There may be data format conversion happening. What data types are you
using?

Matt

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