# Post for mailing list

**URL:** <https://www.ruby-forum.com/t/post-for-mailing-list/231629>\
**Category:** GNU Radio\
**Created:** [August 20, 2014, 8:10am UTC](https://www.ruby-forum.com/t/post-for-mailing-list/231629 "2014-08-20T08:10:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [August 20, 2014, 8:10am UTC](https://www.ruby-forum.com/t/post-for-mailing-list/231629/1 "2014-08-20T08:10:51Z")

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hey. I am trying to synchronize transmissions from multiply relays using  
gnuradio and usrp b200 radios. I would prefer to achieve this in GRC but  
i  
cannot figure out how to to do this. If it is not possible in GRC, then  
please tell me how i can achieve synchronization using python code.  
Thank  
you.

Regards  
Shahmeer Omar

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**Author:** ![Muhammad\_Shahmeer\_O](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/76d3ee/32.png) [@Muhammad\_Shahmeer\_O](https://www.ruby-forum.com/u/Muhammad_Shahmeer_O)\
**Post date:** [August 20, 2014, 10:17am UTC](https://www.ruby-forum.com/t/post-for-mailing-list/231629/2 "2014-08-20T10:17:50Z")

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Shahmeer,

it’s unlikely you’ll get an answer like this. Please use a meaningful  
subject line and explain precisely what you want to set up, and what  
you’ve already succeeded in doing.

I recommend reading  
[http://gnuradio.org/redmine/projects/gnuradio/wiki/ReportingErrors](http://gnuradio.org/redmine/projects/gnuradio/wiki/ReportingErrors).

People have set up relay networks in the past.

M