[Commotion-announce] Very bad ETX

[L. Aaron Kaplan]

On Feb 27, 2015, at 6:22 AM, Josh Harle <josh.harle at gmail.com> wrote:

> With distance the ETX does not improve.  I moved it in stages up to about 20 metres away, and the ETX has gone up to 7.9.
> 

Another thing to consider: ETX is just a synthetic metric / measurement which actually captures packet loss.
So, theoretically there could be way more effects involved than just the short distance (which for sure will be a problem):
  * faulty pigtail cables
  * faulty antennas
  * faulty radio 
  * bugs in the software version which cause packet loss
  etc.

Probably one trick would be to nail down the root cause and then see if a change there results in the desired outcome.

Best,
a.

> Kind Regards,
> 
> Dr Josh Harle
> ____________________
> http://joshharle.com
> http://tacticalspace.org
> ph: +61 (0)409 771 163
> 
> On 27 February 2015 at 15:37, Adam Longwill <adam.longwill at gmail.com> wrote:
> Try moving them much farther away from each other. I have seen that problem too and its because they may be too close. Andy Gunn informed me of the phenomenon.
> 
> On 26 Feb 2015 23:35, "Josh Harle" <josh.harle at gmail.com> wrote:
> Hi All, 
> 
> I had assumed that my very bad ETX was due to a problem with tx power, but I think I was wrong.  I currently have two Picostation M2HPs 3 metres from each other getting an ETX of between 4 and 6.
> 
> Something seems to be wrong there!  
> 
> Is there some obvious troubleshooting I could be doing?  
> 
> What do people think the problem is?
> 
> Kind Regards,
> 
> Dr Josh Harle
> ____________________
> http://joshharle.com
> http://tacticalspace.org
> ph: +61 (0)409 771 163
> 
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