Re: [Discuss-gnuradio] turn off DC offset

[Simona Sibio]

Thank you very much!!

This was the problem.

Now, it works fine.

Best Regards,

Simona

Il giorno mar 30 lug 2019 alle ore 18:38 Julian Arnold <address@hidden> ha scritto:

> We fixed it here <...> 

Sweet! Thanks for pointing that out.

Julian

On 30.07.19 19:24, Michael Dickens wrote:
> Thank you, Julian ... that's the issue here I bet!
>
> Simona is running GR 3.7.14.4, which contains a bug in gr-uhd's GRC interface where the "set_auto_dc_offset" function is executed only if its argument is "True". We fixed it here < https://github.com/gnuradio/gnuradio/commit/fc3eaf1414c192294281eef0a009359d1c913d99 > to take any argument provided -- though only "True" or "False" will work -- and this fix is part of the 3.7.14.5 release.
>
> Simona - Can you update GR to the 3.7.14.5 release? Doing so and using "True" / "False" (without ""s) in the UHD GRC blocks will hopefully resolve your issue. - MLD
>
> On Tue, Jul 30, 2019, at 12:44 PM, Julian Arnold wrote:
>> Hey,
>>
>> I've had a similar issue with a 3.7 version so maybe this helps.
>>
>> For me, no other value than "True" (without "") would generate a call to
>> "set_auto_dc_offset()" in the GRC generated python script ("top_block.py").
>>
>> So, in order to disable DC offset tracking, a quick workaround would be
>> to set "Enable DC Offset Corrections" to "True". This adds the desired
>> call to "set_auto_dc_offset()" to your "top_block.py". Now you only need
>> to manually change "True" to "False" in "top_block.py" and DC offset
>> tracking should be disabled. Remember to not regenerate the flow-graph
>> after making those changes as otherwise GRC will override your changes.
>>
>> Alternatively, you can of course always simply add the line
>> self.uhd_usrp_source_0.set_auto_dc_offset(False, 0)
>> to your script without using GRC.
>>
>> Hope this helps.
>> Cheers,
>> Julian