Re: [Discuss-gnuradio] Fwd: Re: Transmission error

[Michael Dickens]

Hi Rama/Dave - The benchmark examples run as standalone applications. They do require Python, but they do not use GRC or any other GUI interface.

 

Question: Are you running the OFDM or Digital/Narrowband benchmark? What exact commands are you using for both Rx and Tx? What SDR hardware are you using? You might have covered these items already in prior emails, but since this was a new query it's always good to be precise -- of course also trying to keep your query concise.

 

Please reply to this whole list, not just to me. In this manner, others can join in if they so choose.

 

Given the lack of response to your original and even follow-up query, I have some advice to pass on:

 

(1) play around with these GNU Radio-based applications; see what they can do on your system; start with low sample rates & work your way up.

 

(2) Do not expect instantaneous replies to your queries; those of us providing any form of support juggle many things & we will get back to you sooner or later. 24 hours is a reasonable timeframe to expect a reply, not 1 hour or even 5 hours.

 

(3) Do your homework as to the questions you ask. The more informed and precise your questions, the better we can answer them.

 

I hope the above helps. - MLD

 

On Wed, Sep 16, 2015, at 06:17 PM, Rama V wrote:

Do I need to use gnuradio - companion for transmission and reception of the data packets or the benchmark_tx.py commands from the terminal would be enough for that to happen. I am unable to sort out. Kindly help.

Regards,

Dave

On Sep 16, 2015 2:59 PM, "Rama V" <address@hidden> wrote:

---------- Forwarded message ----------

From: "Rama V" <address@hidden>

Date: Sep 15, 2015 7:47 PM

Subject: Re: Transmission error

To: <address@hidden>

Cc:

 

Please kindly help with the above error

Thanks,

Dave

On Sep 14, 2015 5:02 PM, "Rama V" <address@hidden> wrote:

I have a small doubt regarding the reception of data packets. I am attaching a small figure of the command 'uhd_fft' where I mentioned the frequency and the sampling rate as 250k. The command I have given for this  was

 

./benchmark_tx.py -m qpsk -M 2 --discontinuous -f 2.435G

 

I tried to run this and I see an 'U' in the middle of transmission. Is this why I was not able to receive the packets because I get

 

ok = False pktno = 53034 n_rcvd = 1 n_right = 0

 

My PC is Dell Inspiron 15R 5537 and I think it's somewhat a new version. Do I need to mention any sample rate in the command of benchmark. And also when I set the sample rate to 250k in my benchmark command, my laptop freezes and I need to restart it again. Do I need to give a low value? Please help and excuse for my brevity.