Re: [Discuss-gnuradio] gmsk2 (new tunnel.py)

[Eric Blossom]

On Thu, Jun 22, 2006 at 03:32:10PM -0500, Brett L Trotter wrote:
> I've got two machines with one usrp each using basic tx/rx board pairs.
> 
> As soon as I start tunnel.py on each and set the ip's, one machine
> (usually the one started second) starts showing BBBBBBBBBBBBBBBBB.....
> 
> If i disconnect wires, both sides go silent, reconnect and one or both
> start showing BBBBBBBBBBBBBBBBb...
> 
> what is the 'B' anyway?

'B' means "backoff".  
It prints a B everytime it attempts to transmit if it detects carrier.

> I cannot ping between the hosts.. what am I missing?

First off, this example will only work with RFX-* daugherboards, not
the basic tx and rx board.  Why: we currently can't enable/disable the
transmitter on the basic tx board.

If using a RFX-* board and you see this, try setting the rx gain lower
and/or the carrier sense threshold higher.

  $ tunnel --help

will give help ;)

Eric