[Discuss-gnuradio] So long and thanks for the conference!

2012-09-28 Thread Douglas Geiger
I just wanted to extend my thanks to Tom Rondeau, Matt Ettus, Johnathan Corgan and all the excellent presenters for a fantastic GRCon12. I missed out last year, but I'm very happy I made it to this one. Thanks again - and I'm looking forward to next year. Doug -- Doug Geiger doug.gei...@bior

[Discuss-gnuradio] gr_modtool: disable function

2012-09-28 Thread Martin Braun (CEL)
Hi, a minor update to gr_modtool, you can now use $ gr_modtool disable foo_ff to disable blocks. This will uncomment them from the CMakeLists.txt, modulename_swig.i and __init__.py. As usual, available at https://github.com/mbant/gr-modtool M -- Karlsruhe Institute of Technology (KIT) Commun

[Discuss-gnuradio] Can another DUC chain be added to USRP N210?

2012-09-28 Thread Anisha Gorur
Hello All, I am using a USRP N210. When i set the subdev spec for my basic RX daughterboard as "A:A A:B" I can receive two channels. However, if I try to do something similar for the basic TX I get an error like "The user specified 2 channels, but there are only 1 tx dsps on mboard 0." I assume th

Re: [Discuss-gnuradio] Now: Virtual Machine Was: how to get bootable cd of gnuradio

2012-09-28 Thread Marcus Müller
Hello Omer, I've taken the liberty and built a minimal Virtual Machine, based on debian with a lightweight graphical interface (lxde), preequipped with a minimal GNU Radio installation, and some minimal instructions on how to start with those. Please report your experience with that. Since the i

[Discuss-gnuradio] A Question on WX GUI FFT Sink

2012-09-28 Thread LD Zhang
Hello, I have a simple GRC demo where the USRP source goes to a WX GUI FFT sink and WX GUI Scope sink. They appear to be a good tools for sanity checks. One feature I don't find however but I think should be quite necessary is when one needs to examine a portion of the FFT spectrum more closely. B

Re: [Discuss-gnuradio] 8-channel receiver

2012-09-28 Thread Anisha Gorur
Thanks Matt! Do you have any idea for what kind of latency we would expect? Also would the data be routed through the host? My Radio, We only have a couple months to do this, but we have tried to synchronize USRPs before, so we are aware of some of the problems. Thanks, Anisha On Wed, Sep 26, 2012

Re: [Discuss-gnuradio] Synchronize phases between two N200

2012-09-28 Thread Josh Blum
On 09/26/2012 08:41 PM, Shih Oliver wrote: > > Hi, I'm trying to synchronize two N200s in phases with both of them > having GPSDO inside. I followedthe instructions on ettus for > synchronizing channel phase. However, I got error message as follows, > UHD source block got error code 0x2gr_block

Re: [Discuss-gnuradio] How to capture the Rx data using uhd_rx_cfile and agree with the uhd_fft Scope mode data

2012-09-28 Thread Josh Blum
On 09/27/2012 02:42 PM, LD Zhang wrote: > Yes. I can understand the LFRX does not have any adjustable gain. But what > comes out of the USRP source should be samples already digitized. Surely > there is gain to be adjusted before the ADC. According what I see, it is > from 0 to 6dB (in voltage?).

Re: [Discuss-gnuradio] Can another DUC chain be added to USRP N210?

2012-09-28 Thread Josh Blum
On 09/28/2012 08:49 AM, Anisha Gorur wrote: > Hello All, > > I am using a USRP N210. When i set the subdev spec for my basic RX > daughterboard as "A:A A:B" I can receive two channels. However, if I try to > do something similar for the basic TX I get an error like "The user > specified 2 channe

Re: [Discuss-gnuradio] A Question on WX GUI FFT Sink

2012-09-28 Thread Josh Blum
On 09/28/2012 02:15 PM, LD Zhang wrote: > Hello, > > I have a simple GRC demo where the USRP source goes to a WX GUI FFT sink > and WX GUI Scope sink. They appear to be a good tools for sanity checks. > One feature I don't find however but I think should be quite necessary is > when one needs to

Re: [Discuss-gnuradio] A Question on WX GUI FFT Sink

2012-09-28 Thread Marcus D. Leech
WX FFT sink cant do this. But... FWIW, the QT gui FFT display sink does have a zoom feature. -josh ___ You can do the zooming in the flow-graph. multimode does this with wxGUI widgets. -- Marcus Leech Principal Investigator Shirleys Bay Radio A

Re: [Discuss-gnuradio] 8-channel receiver

2012-09-28 Thread Josh Blum
On 09/28/2012 02:46 PM, Anisha Gorur wrote: > Thanks Matt! > Do you have any idea for what kind of latency we would expect? Also would The dominating factor in latency here is the gigabit ethernet, this tends to be around 100us. Here are a few notes about that: http://files.ettus.com/uhd_docs/m

Re: [Discuss-gnuradio] How to capture the Rx data using uhd_rx_cfile and agree with the uhd_fft Scope mode data

2012-09-28 Thread LD Zhang
I looked and ran the attached GRC file. It does work. I have a question on whether the slider gain is applied before or after the ADC? LD On Fri, Sep 28, 2012 at 3:28 PM, Josh Blum wrote: > > > On 09/27/2012 02:42 PM, LD Zhang wrote: > > Yes. I can understand the LFRX does not have any adjustab

Re: [Discuss-gnuradio] How to capture the Rx data using uhd_rx_cfile and agree with the uhd_fft Scope mode data

2012-09-28 Thread Josh Blum
On 09/28/2012 04:34 PM, LD Zhang wrote: > I looked and ran the attached GRC file. It does work. I have a question on > whether the slider gain is applied before or after the ADC? > The set_gain call applies to all gain elements on the RF frontend and in the ADC. In this case, when using LFRX +