Receiving serial data

2025-01-16 Thread Muhammad Anas
Dear GNU Radio Community, Is there any method for receiving data serially from another GUI application other than GRC using xmlrpc/zmq blocks. I want to control GRC parameters from another application serially in runtime. Regards Muhammed Anas

Reducing rare underflows to zero occurrences

2025-01-16 Thread Chad Spooner
All: I'm developing a comm system involving three SDRs: transmit, channel effects, and receiver. The channel SDR is controlled by a flowgraph that has various options for the channel: AWGN (h(\tau) = \delta(\tau)), LTI, and a couple time-variant frequency-selective channel models. I need t

Re: Receiving serial data

2025-01-16 Thread Onno Benschop
This is functionality that I'm going to need in the not too distant future. I haven't yet got to that point, so I'm guessing, but I suspect that you can use a file source / sink and point it at a serial port: - /dev/ttyS0 (serial port) - /dev/ttyUSB0 (serial over USB) - /dev/ttyACM0 (seri

Re: DVBS2 TX

2025-01-16 Thread Ron Economos
The output of the Physical Layer Framer block is already interpolated by 2X with zero stuffing. https://github.com/gnuradio/gnuradio/blob/main/gr-dtv/lib/dvbs2/dvbs2_physical_cc_impl.cc#L835 Ron On 1/16/25 13:22, othman hijazi wrote: Hello everybody , Iam trying to build a TX DVBS2 ,QPSK

Re: Reducing rare underflows to zero occurrences

2025-01-16 Thread Daniel Estévez
Hi Chad, Something that you can do to monitor the problem is to look in /proc/net/udp. This will show you the fill level of kernel UDP receive buffers. If you've set the buffer size to 32 MiB as recommended by the performance tuning tips, usually these sporadic drops are the result of the flo