Re: [Discuss-gnuradio] gr-rds

[Michael Thelen DK4MT]

Hi Marcus,

I hoped so, that is why I bought one ;-). I think the max is 73dB. The
actual value I set with a slider is 90dB. Thus I am pretty much maxed
out there. But like I wrote earlier, that is the only way to receive at
least one station. Don't have good RF working conditions. Even cellular
is a problem.

BR
Mike


> Hi Mike,
> the B200 should usually be a little more reliable than the RTL dongles;
> what gain setting are you using?
> 
> Best regards,
> Marcus
> 
> On 08/25/2015 02:08 PM, Michael Thelen DK4MT wrote:
>> Hi Andreas,
>>
>> thanks for the hint. However I am using a Ettus B200 and do not have
>> access to a different SDR right now. I will test outside and then trying
>> to find out what is going on.
>>
>> BR
>> Mike
>>
>>
>>> Hi Michael,
>>>
>>> i read your mail and i could remember i had a similar problem with a lot
>>> of lost sync and bad block messages.
>>>
>>> My solution was to use a different RTL USB stick and to play with
>>> antenna type / antenna position and the gain of the RTL stick.
>>>
>>> I used a "classical" lamda / 2 dipol UKW Radio antenna. The stick was a
>>> noname.
>>>
>>> regards,
>>> Andreas
>>>
>>>
>>>
>>>
>>>
>>>
>>> Am 23.08.2015 um 20:02 schrieb Michael Thelen DK4MT:
>>>> Hi Marcus,
>>>>
>>>> thanks, tried your script and found out, that it is always a little bit
>>>> uncomely if something is not really reproducible. This is the status:
>>>>
>>>> With your script I did not get the earlier error anymore. However with
>>>> my original I did not get it either. Instead I get the following message
>>>> in GRC:
>>>> @@@@@ Sync State Detected
>>>> @@@@@ Lost Sync (Got 50 bad blocks on 50 total)
>>>>
>>>> I do not get this message if I run your script. Both scripts though do
>>>> not show RDS information. So before I steal somebody's time I wonder if
>>>> one reason could be, that I can only receive one station really at the
>>>> limit and only if I set gain to a max. I can hear fairly clear audio,
>>>> but I am not sure if I can conclude from, that RDS decoding should work.
>>>> I am pretty much insulated from RF at my place. What would be in favor
>>>> by people being sensitive to EM waves, but for experimenting it is
>>>> pretty bad.
>>>>
>>>> So I might gonna check this outside, where I can see in my car, that RDS
>>>> reception is working on my radio and then I can compare. Just want to
>>>> make sure we or you aren't chasing an error which might be based on poor
>>>> reception.
>>>>
>>>> However the messages in the terminal have been there last time and the I
>>>> copied to also were there. Still don't no if this is part of the problem
>>>> though. Therefore probably more testing on my side.
>>>>
>>>> Best regards,
>>>> Mike
>>>>
>>>>
>>>>
>>>>> Hi Mike,
>>>>>
>>>>> dashed only means "message port connection" rather than "item stream",
>>>>> so that's nothing to worry about, usually.
>>>>> So the bad news is that this is possible a GRC bug, which on the other
>>>>> hand is good news, because it means that gr-rds isn't broken, GRC just
>>>>> has a hard time correctly generating the python file.
>>>>> Since that worked for me: can you try the attached python file?
>>>>>
>>>>> Best regards,
>>>>> Marcus
>>>>>
>>>>> On 22.08.2015 11:26, Michael Thelen DK4MT wrote:
>>>>>> Hi,
>>>>>>
>>>>>> I am using GNU Radio 3.7.7.2 and I checked out out and built gr-rds.
>>>>>> However RDS Decoding is not working. I found that there are to two
>>>>>> connections have dashed lines (see picture). And in the terminal all I
>>>>>> get is Error: Cannot create connection. But I could not find a hint,
>>>>>> what is going wrong. Can somebody tell me, what to check for?
>>>>>>
>>>>>> Best regards,
>>>>>> Mike
>>>>>>
>>>>>>
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