Further, I'm not sure that benchmark_tx/rx can actually do bit rates as low as 240 bits/second, because the have a fairly-simple symbol-rate model, and the USRP1 can only support sample rates down to 192k.
You said that uhd_fft also produced 'O' indications--what parameters were you using with uhd_fft? On 2014-11-20 10:35, Marcus Müller wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > 1. Tom is absolutely right. Benchmark_tx is something that illustrates > some very interesting aspects of GNU Radio, but it's not something you > start with, because the things you see won't mean a thing to you. So > do the guided tutorials, and if you feel like you're missing out on > some theoretical aspects, maybe pay the "suggested reading" page a visit. > 2. Overflows mean that your PC is too slow to keep up with the real > time sample processing. Basically, this is nothing that you can solve > by doing anything within the "basic" usage of GNU Radio. It just means > your machine is too slow. > > Greetings, > Marcus > > On 11/20/2014 11:32 AM, alok ranjan wrote: > >> Hello All, I have just started learning SDR and new to USRP as well for GNU >> radio. SInce i am just a beginner, so i started with very basic examples >> benchmark_tx.py and benchmark_rx.py on USRP1. I am using daughter board WBX. >> I am getting an overflow problem both for receiver and uhd_fft as well. I >> tried to search on google but there was no clue for USRP1. Please help me >> out to this very initial example problems. Thank you, in advance. Below is >> the command i am passing for tx and rx benchmark_tx.py -a serial=49270a48 -f >> 2.2G -m gmsk -r 240 --tx-gain=20 --tx-amplitude=0.8 in another terminal for >> benchmark_rx i am passing this benchmark_rx.py -a serial=4d05ac4b -f 2.2G -m >> gmsk -r 240 --rx-gain=20 forrx and alsofor uhd_fft it is printing the same >> oooooooo continues. Thank you. >> _______________________________________________ Discuss-gnuradio mailing >> list Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio [1] > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1 > > iQEcBAEBAgAGBQJUbgpFAAoJEAFxB7BbsDrL3SAH/AuKbB52xPpJ5Or39bZ9+2WY > VzjV24/O+aLNfmqFzuYd5bK18A11CAZ4elEbHcdtIhTYUVCapZIWTZe0b0d4ZjRz > Y0zEEJH+cKQkEpz+7TPcPa6kLsN8rhD7pAhUlSUHMOAcedNWOj5slLlx8+F85c3x > YpMRD1L6nZz4gMtNe1KVEEI4vKjZg5kdt5X9ddwQ12KoOyiNv2qGHZyne3OUedwr > mO95bXVuZ44iYg4yzSvXF72o/psIlcD3XrmPdMIW0WmTC8Yy41fnLMqp90jCCAjE > Y/esA72Moc9PBDhtWLX4YD7dCOADOvDnXcrlfiSRHBNNmSNoLPIIl6GCR+UxbHw= > =Q2X1 > -----END PGP SIGNATURE----- > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio [1] Links: ------ [1] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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