Re: [Discuss-gnuradio] gmsk in light of fpga modifications

[Eric Blossom]

On Thu, Jan 18, 2007 at 03:01:49AM -0800, Brett Trotter wrote:
> 
> 
> 
> Brett Trotter wrote:
> > 
> > I'm still trying to do gmsk over the LFRX/TX boards and had hoped that my
> > fpga modification might help. I can get the tunnel up and ping and even
> > copy about 400-600kb of a file over scp, but then all of a sudden, the
> > environment deteriorates and the packets stop going through- at first they
> > go like crazy, then just a clump at a time with a bunch of no-answers
> > in-between, then they stop getting through altogether. What could be going
> > on do you suppose? What can I do to make it more stable?
> > 
> 
> Replying to myself, it seems that if I do an ssh and cat a bunch of data
> from /dev/urandom through strings, eventually, the tunnel cant keep up and
> data stops streaming. Funny enough though, if I hit a key, it still sends
> data. It seems as if the ssh session got out of sync. Another ssh session
> running simultaneously, but not actively communicating, remains happy once
> the other dies.
> 
> I realize ssh probably isn't the best thing to test with, but it happens to
> be a quick and easy way to test file sending. The question is, is our tunnel
> acknowledging corrupted packets instead of asking for resends? The question
> I'm asking ultimately is, what would cause corruption of the ssh session?

What data rate are you using?
Can your machines keep up?
FWIW, I often test with ssh and tunnel.

Eric