Re: Synchronization: PPS and Tx signal in a USRP N200

On 2021-12-10 17:25, isaac mario tupac davila wrote: Hello everyone! My name is Isaac. I have a curious situation here... I've generated a pulsed signal per second. I've saved one second period in a .h5 file, so that I'm sure I'm having a fixed signal per second, and then repeat it in my GRC

Synchronization: PPS and Tx signal in a USRP N200

Hello everyone! My name is Isaac. I have a curious situation here... I've generated a pulsed signal per second. I've saved one second period in a .h5 file, so that I'm sure I'm having a fixed signal per second, and then repeat it in my GRC flowgraph. . To use this signal as Tx I'm trying to

Re: Changing output of selector block using stream tags

Phillip, If I understand your question, you want to 'turn on' the recording upon receiving an "enable" stream tag. I would look at the following blocks or maybe use a simple Embedded Python block: https://wiki.gnuradio.org/index.php/Mute https://wiki.gnuradio.org/index.php/Burst_Tagger

Re: Adaptation of Federico La Roccas ISDB-T blocks for DVB-T

Hi Vasil, thanks for the information. I am using Linux Mint 20.2 Uma and GNU Radio 3.8.3.1. I don't know yet how to install the debug symbols but perhaps this is not necessary. As I have found out, the downstream blocks expect tags that I don't send and that is the reason why my flowgraph fails

Re: Adaptation of Federico La Roccas ISDB-T blocks for DVB-T

Hi Ralf, > Thread 27 "dvbt_symbol_inn" received signal SIGSEGV, Segmentation fault. > [Switching to Thread 0x7fffc5ffb700 (LWP 1924)] > 0x7fffe61a2e0d in ?? () from > /lib/x86_64-linux-gnu/libgnuradio-dtv.so.3.8.3 > (gdb) bt > #0 0x7fffe61a2e0d in () at >

Re: Adaptation of Federico La Roccas ISDB-T blocks for DVB-T

Hi Federico, indeed, the "symbol_index" tag that is normally sent for each OFDM symbol is missing. This might cause an unexpected situation for the following deinterleaver block, "Access not within mapped region" according to valgrind. I will see how I can generate the symbol index for each

Re: Adaptation of Federico La Roccas ISDB-T blocks for DVB-T

Hi, I'd be more than happy to help. A couple of things that come into my mind. The OFDM Synchronization block is a combination of our "old" OFDM Symbol acquisition (for a while now it's been part of GNU Radio) and Sync and Channel estimation blocks (which performed equalization and integer

Re: Wide spectrum sweep

Ciao Andrea, not sure if GNURadio is a requisite to you or rather a possible tool to achieve your project. Either way, you can have a look at QSpectrumAnalyzer that is open source and does exactly that. https://github.com/xmikos/qspectrumanalyzer At the very least you can have a look at the way

Re: Questions On GNU Radio FFT Data logging

Hi Chong Zhi, I assume you want to observe the FM band ~90MHz to ~100MHz is that correct? If you want to listen to audio, have a look at gr-rds. https://github.com/bastibl/gr-rds It helps quite a bit more to understand FM. Since this discussion seems to have started in the GR Matrix chat, I

Re: Adaptation of Federico La Roccas ISDB-T blocks for DVB-T

Hi Ralf, On 10/12/2021 11.52, Ralf Gorholt wrote: > Unfortunately, when I deactivate the original flowgraph, it does no > longer work and I get a -11 return code. The "-11" value means that you got a segmentation fault and the process was kill with signal 11 (SIGSEGV)

Re: Questions On GNU Radio FFT Data logging

Dear Zen Chen, to subscribe to the mailing list you need to follow this link: https://lists.gnu.org/mailman/listinfo/discuss-gnuradio I think the account on the GNURadio website is for editing the Wiki etc. You are sampling your signal at 10 MSamples per second. Since you use a complex

Adaptation of Federico La Roccas ISDB-T blocks for DVB-T

Dear all, I forgot to mention in me previous mail that the test flowgraph is not generated by GRC when it terminates with a -11 return code. I have just noticed that the test.py file is missing. My GNU Radio version is 3.8.3.1. Ralf

Adaptation of Federico La Roccas ISDB-T blocks for DVB-T

Dear all, in order to benefit from Federicos ISDB-T block "OFDM Synchronization" that performs a frequency and symbol rate correction I am currently trying to adapt his blocks "OFDM Synchronization" and "TMCC Decoder" in a way that makes them usable for DVB-T. To check if they work correctly I

Questions On GNU Radio FFT Data logging

Yes933_10_12_20212nd.csv HI all, My name is Zen Chen , a GNU radio Novice and I tried to create an account on the GNU Radio .org website to post my questions on the mailing list however I could not . I am using