Hi Marcus. Thank you very match for your responses. 1. I use HackRFs, both with latest firmware. I do not receive any Error-Messages in Debug Console. But, as I exposed smaller Samplerate in "Osmocom"-Block or used wav-File with larger Samplerate, streamed "UUU" and "OOO" Symbols in Console an Transmitter and Receiver side respectively. 2. I meant Mbit/s :-) 3. I used "Trhrottle"-Block because it was so advised in this topic:https://github.com/gnuradio/gnuradio/issues/1314 4. Yes, i did it in order to compensate Frequency-Offset. 5. Ok, i will try. Thank you! I hope that my answers will help solve the problem with the use of existing blocks. Best regards, Timur
On 15.12.2017 23:06, Müller, Marcus (CEL) wrote: > Just a few notes, before I head to bed: > > * Which SDR device are you using? From the top of my head, I can't > think of one that supports a 32 kS/s sampling rate. Do you get output > that says "couldn't use sampling rate" or similar? > * In your original question you said you're using "1.25 Mps" (what's > "Mps", by the way?). That clashes with 32 kS/s. > * Never, never, never use "Throttle" in a flow graph with hardware. > Read the output on the console!! GRC **warns** you about that. > * Your receiver is tuned off by 25 kHz. Is that intentional? > * Your transceiver is completely based on deprecated blocks. Don't use > those; use the packet/header mux and demux instead. > > Best regards, > Marcus > > > On Fri, 2017-12-15 at 22:17 +0100, Timur Karychev wrote: >> Hi Marcus, >> Please find attached Screenshots of (tx/rx) flowgraphs that I used to >> transfer the file. >> Without Codecs. The sound lasts well for several tens of seconds, >> then errors are heard. I'm transmitting the wav file with 8 KHz >> Samplerate. >> >> I hope you can help in this matter. Looking forward to receiving your >> reply. Thank you. >> Timur >> >> On 15.12.2017 17:17, Müller, Marcus (CEL) wrote: >>> Hi Timur, >>> >>> there's infinitely many things that can go wrong – this might be a >>> design mistake, this might be device imperfections, or this might >>> really just be noise on your wireless channel. >>> >>> So, without you posting all details about your transmitter/receiver >>> implementation, this will be pretty impossible to answer! >>> >>> Looking forward to more info, >>> Regards, >>> Marcus >>
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