Re: [Discuss-gnuradio] how to use the gnuradio block with c programing

2016-04-19 Thread Tom Rondeau
On Mon, Apr 18, 2016 at 10:43 PM, Ekko wrote: > hi Tom > i read the examples in gr-audio/examples/c++, and the examples in > gr-uhd/examples/c++; > these two examples is all use the block in gnuradio,just like the audio > sink,uhd sink. > and i want to multiple the output of the signal source of

Re: [Discuss-gnuradio] Overflow error in benchmark receiver side "DDDD"

2016-04-19 Thread Marcus Müller
Hi Monika, that is a very ubiquitous chipset, and it works well – if I remember correctly, it can't do interrupt coalescing, though, so your CPU might take quite a hit at high rates. Still, you should see Overflows before your system drops packets. Have you tried to enlarge the RX buffers as menti

Re: [Discuss-gnuradio] how to use the gnuradio block with c programing

2016-04-19 Thread Marcus Müller
As Tom said, it's almost certain that you shouldn't be calling a block's work() or general_work() manually – that's a severe breach of "contract", because you didn't call check_topology, start, forecast etc before, and unless you know very well what you're doing, you can't be sure none of this is r

Re: [Discuss-gnuradio] CT1FFU converter with RTL-SDR and gqrx

2016-04-19 Thread Daniel Pocock
On 18/04/16 23:11, Daniel Pocock wrote: > > > On 18/04/16 22:32, Ron Economos wrote: >> There's a high pass filter on the output that is designed to pass >> frequencies above 150 MHz. If the LO is only 40 MHz, the high pass >> filter will greatly attenuate the entire HF band. >> > > That had o

[Discuss-gnuradio] Tomorrow! Cyberspectrum: Software Defined Radio Meetup (Wed 20th April) 6:30pm

2016-04-19 Thread Balint Seeber
Dear all, Announcing the fifteenth Cyberspectrum meetup tomorrow, which will be held in the South Bay! Come along at 6:30pm for a 7pm sharp kickoff, and for those unable to attend please join the live stream like last time: https://www.youtube.com/watch?v=u8CYptnVv3Y There's also IRC: #cyberspec