Well, from looking at doxygen I see the appropriate syntax and key needed to do 
this. I guess the question is would I have to modify the .py file or is there a 
block I could modify to accomplish this?
Tellrell White  

    On Friday, June 23, 2017 8:13 AM, Tellrell White <t_whit...@yahoo.com> 
wrote:
 

 Thanks for the reply Marcus. Sorry for not attaching the flow graph. I've 
attached it now. Is there an example somewhere of the method you speaking of? 
I'm still pretty new to gnuradio so I'm a little unsure of how to proceed.
ThanksTellrell
 

    On Thursday, June 22, 2017 5:28 AM, Marcus Müller 
<marcus.muel...@ettus.com> wrote:
 

   Hi Tellrell, um, that's kind of hard to tell without knowing your flow 
graph! However, if you've got a block (eg. the USRP Sink) that allows 
configuration through async message passing: Try my gr-msgblock OOT Module, and 
use/modify variable_to_msg to translate the variable to a message that you send 
to that block. Best regards, Marcus 
  
 On 06/21/2017 05:26 PM, Tellrell White wrote:
  
 Hello Guys
 I have a flowgraph attached where I'm trying to generate BER curves for 
different transmit gain values. Right now, I have gui slider that allows me to 
adjust the gain values, however, I would like to know if it's possible to have 
the gain values adjust automatically by changing the python script for the 
flowgraph. If so, I would appreciate any ideas or examples on how to do this.
 
 Thanks
 Tellrell White 
  
  
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