Hi Marcus, I did some further testing. Took me some time unfortunately. The RDS reception outside is slightly better. But I still got "Lost Sync" info in the terminal window. However, I could see decoded information. I can't fight the feeling, that I am missing quite a bit of sensitivity. I did some more testing with a flowgraph from the gr-gsm packet in the apps directory. There must be BTSs out there ;-). But I could not see anything. I used the Ettus Log-Per antenna.
I want to check the hardware and make sure everything is working correctly. But I will move my question concerning the hardware to the USPR-users mailing list. Best regards, Mike > 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 >>>>>>> >>>>>>> >>>>>>> _______________________________________________ >>>>>>> Discuss-gnuradio mailing list >>>>>>> [email protected] >>>>>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>>>> >>>>>> _______________________________________________ >>>>>> Discuss-gnuradio mailing list >>>>>> [email protected] >>>>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>>>> >>>>> _______________________________________________ >>>>> Discuss-gnuradio mailing list >>>>> [email protected] >>>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> _______________________________________________ >>> Discuss-gnuradio mailing list >>> [email protected] >>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> [email protected] >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
