Search found 455 matches

by jynik
Thu Jul 21, 2016 7:29 am
Forum: Troubleshooting
Topic: VirtualBox: No bladeRF device(s) available.
Replies: 10
Views: 31161

Re: VirtualBox: No bladeRF device(s) available.

Hi Nicolae, VMs vs Bootable Image In the past, VMs seem to just introduce another set of variables into the troubleshooting, which is why we generally don't advise they be used. It may be the case that various VM offerings have improved significantly, but we have heard reports of poorer performance ...
by jynik
Wed Jul 20, 2016 3:51 pm
Forum: Troubleshooting
Topic: VirtualBox: No bladeRF device(s) available.
Replies: 10
Views: 31161

Re: VirtualBox: No bladeRF device(s) available.

Just for the sake of noting -- there's native support for OS X for what it's worth, through both MacPorts and HomeBrew. In the past we've seen people struggle with USB 3 and VM software, and generally recommend operating natively. With that said... Can you provide the output of lsusb? Do you see the...
by jynik
Wed Jul 20, 2016 2:36 pm
Forum: Software development
Topic: Questions from a beginner
Replies: 35
Views: 71344

Re: Questions from a beginner

Hi jom, I'll try to answer some of these the best I can, inline'd with your questions. My advice to you would be to look more into Pothos, GNU Radio, or MATLAB first -- you can do lots with simulation before you have hardware in your hand. ("Simulation before hardware!" is something I expect rings t...
by jynik
Wed Jul 20, 2016 9:51 am
Forum: Hardware and RF
Topic: PTT?
Replies: 5
Views: 17648

Re: PTT?

It's been a while since I've been in the gr-osmodr code . I would start with reviewing the source_impl.c/h and sink_impl.c/h and then the code in the lib/bladerf directory. As a quick test, you could probably register a message handler in the bladeRF source or sink, and then print out messages (from...
by jynik
Fri Jul 08, 2016 9:33 am
Forum: Troubleshooting
Topic: Cannot fire the synchronized TX
Replies: 2
Views: 11071

Re: Cannot fire the synchronized TX

I think you may have forgotten to increase the TX Timeout parameter. You can confirm this by running the command tx before you run the trigger j71-4 command. If I am correct, the TX status would show a timeout error. Take another look at the master.txt example script, and note the timeout=60s . The ...
by jynik
Fri Jul 08, 2016 9:24 am
Forum: Troubleshooting
Topic: [Simulink] TRX buffer-overflow and firmware loopback error
Replies: 7
Views: 19829

Re: [Simulink] TRX buffer-overflow and firmware loopback err

1. You are correct, when bladerf_enable_module() is called on the TX module, the LMS6002D DAC should be held at 0+0j. (Of course, you may have some LO leakage due to DC offset, which you can try calibrate out). 3. One idea here might be to transmit a few 0+0j samples to force the DAC to hold at 0+0j...
by jynik
Thu Jul 07, 2016 7:51 am
Forum: Troubleshooting
Topic: [Simulink] TRX buffer-overflow and firmware loopback error
Replies: 7
Views: 19829

Re: [Simulink] TRX buffer-overflow and firmware loopback err

In Simulink, I don't know to manage signal stop and go. So, I want to stop signal or change signal to zero from the last sample value at buffer under-run. Do you think what is the better way? I'm sorry, I don't know of any way to do this, aside from modifying the HDL to add a mux that switches over...
by jynik
Wed Jul 06, 2016 8:30 pm
Forum: Hardware and RF
Topic: PTT?
Replies: 5
Views: 17648

Re: PTT?

A few folks, including myself had discussed adding GPIO support to gr-osmosdr (the block that provides sources and sinks for bladeRF and numerous other devices) at one point, but no one's working on it as far as I know. I think adding GPIO support would be a very well-received contribution to gr-osm...
by jynik
Wed Jul 06, 2016 8:22 pm
Forum: Troubleshooting
Topic: TX Modulation Spurs
Replies: 3
Views: 12426

Re: TX Modulation Spurs

Excellent - glad it was an easy fix!
by jynik
Tue Jul 05, 2016 7:50 am
Forum: Troubleshooting
Topic: [Simulink] TRX buffer-overflow and firmware loopback error
Replies: 7
Views: 19829

Re: [Simulink] TRX buffer-overflow and firmware loopback err

(1) You are correct -- there is a very important relationship between the size of buffers (S), the number of buffers (N), and the number of samples (S2) consumed/produced in each step. libbladeRF internally maintains N buffers of S samples. At your sample rate, you can calculate how much time this l...