[Discuss-gnuradio] Simple Tx/Rx setup

2013-11-04 Thread Joel Tong
Hello folks, I am attempting to transmit a bit stream from one bladeRF to another bladeRF using an SMA cable from the Tx output to the Rx input of the other. For simplicity's sake, I'm transmitting a finite bit stream of 1's (not ASCII 1's), and setting the File Source to not repeat itself. I sta

Re: [Discuss-gnuradio] Simple Tx/Rx setup

2013-11-04 Thread Moritz Fischer
Kamarisam, I really hope you're using an attenuator in between the two devices. I'm not terribly familiar with bladerf's frontend but if it works similar to our devices, you'll fry them if you don't attenuate the TX signal going through the SMA cable. Cheers, Moritz

[Discuss-gnuradio] Simple Tx/Rx setup

2013-11-04 Thread Kamarisam
Hello folks, I am attempting to transmit a bit stream from one bladeRF to another bladeRF using an SMA cable from the Tx output to the Rx input of the other. For simplicity's sake, I'm transmitting a finite bit stream of 1's (not ASCII 1's), and setting the File Source to not repeat itself. I sta

[Discuss-gnuradio] BPSK receiver issue

2013-11-04 Thread Vanush Vaswani
Hi all, I am using GR 3.6.5.1 to receive BPSK modulated data from a third party RF chip / microcontroller combination and am having a strange experience. I am implementing a very simple protocol by constantly transmitting 0x7E constantly and then ASCII data triggered by a serial connection to the

Re: [Discuss-gnuradio] Rounding Error between Python and C++ Blackmanharris Window

2013-11-04 Thread Tommy Tracy
Turns out that this is more than a rounding error. it is an off-by-one error at index 1 given N=1024. In python it is defined as follows in (gnuradio/gr-fft/python/fft/ window.py) -- blackmanharris = coswindow((0.35875,0.48829,0.14128,0.01168)) where def coswindow(coeffs): def closure(

Re: [Discuss-gnuradio] Rounding Error between Python and C++ Blackmanharris Window

2013-11-04 Thread Johnathan Corgan
On 11/04/2013 08:04 AM, Tommy Tracy wrote: > Turns out that this is more than a rounding error. it is an off-by-one > error at index 1 given N=1024. Thanks for tracking this down. Can you summarize your findings in a bug report on the website? -- Johnathan Corgan, Corgan Labs SDR Training and

Re: [Discuss-gnuradio] How to get multipe rx_time tags while receiving continuously

2013-11-04 Thread Harry Zhang
Dear Miklos, Yes, I do never stop receive program. I'm using USRP N210, WBX, Ubuntu12.04 and UHD3.5.3. I'm writing a document in detail, which will be sent to you later today. Best, Harry 2013/11/3 22:47, Miklos Maroti wrote: Hi Harry, You never stop the receiver on node B and C, right