Re: [Discuss-gnuradio] USRP 1 overflow problem

[mleech]

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:

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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 address@hidden https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

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