# E100 simultaneous Tx/Rx

**URL:** <https://www.ruby-forum.com/t/e100-simultaneous-tx-rx/210211>\
**Category:** GNU Radio\
**Created:** [August 2, 2011, 2:31pm UTC](https://www.ruby-forum.com/t/e100-simultaneous-tx-rx/210211 "2011-08-02T14:31:14Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![luislavena](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/0ea827/32.png) [@luislavena](https://www.ruby-forum.com/u/luislavena)\
**Post date:** [August 2, 2011, 2:31pm UTC](https://www.ruby-forum.com/t/e100-simultaneous-tx-rx/210211/1 "2011-08-02T14:31:14Z")

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I try to do some ‘helloworld’ type tests and I found a problem. I write  
code  
in Python using UHD as the interface to HF HW. I can successfully  
receive  
stream samples and push it to the filters / demodulator / bells /  
whistles… It works OK to some degree (Overruns signalized). anyway I  
have  
problem to make it working simultaneously on Rx and Tx. It looks like  
instantiation problem - rx stuff grabs E100 and does not mat it to be  
shared  
by tx. Is there any example of such (or similar) code - just working  
one.

I have also another issue - I will have to decode something from rx then  
send ‘predefined’ samples and then do repeat after ‘remodulation’  
(regeneration). Is tehre any hint how to do it from the Python code?

GRM

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**Author:** ![Radio\_Man](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e56c9b/32.png) [@Radio\_Man](https://www.ruby-forum.com/u/Radio_Man)\
**Post date:** [August 2, 2011, 2:36pm UTC](https://www.ruby-forum.com/t/e100-simultaneous-tx-rx/210211/2 "2011-08-02T14:36:48Z")

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On 08/02/2011 08:30 AM, Radio Man wrote:

> (regeneration). Is tehre any hint how to do it from the Python code?  
> What software do you have on your e100? Kernel and uhd?

Philip

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**Author:** ![Radio\_Man](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e56c9b/32.png) [@Radio\_Man](https://www.ruby-forum.com/u/Radio_Man)\
**Post date:** [August 2, 2011, 3:03pm UTC](https://www.ruby-forum.com/t/e100-simultaneous-tx-rx/210211/3 "2011-08-02T15:03:23Z")

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Plain vanilla.  
UHD\_0001.20101214211912.1  
Linux version 2.6.35 (balister@astro) (gcc version 4.5.2 20101026  
(prerelease) (GCC) ) #1 PREEMPT Fri Nov 5 08:56:09 PDT 2010