Re: [Discuss-gnuradio] Using gr_sync_decimator [was: How to use forecast()?]

2010-08-06 Thread Eric Blossom
On Sat, Aug 07, 2010 at 01:07:20AM +0100, Samy Sammour wrote: > > This is my block's constructor: > > my_package::my_package(int num_input_ports, int L_samples) > : gr_sync_decimator( >"package", > > gr_make_io_signature(2, 5, sizeof(gr_complex)), > > gr_make_io_signatur

RE: [Discuss-gnuradio] Using gr_sync_decimator [was: How to use forecast()?]

2010-08-06 Thread Samy Sammour
This is my block's constructor: my_package::my_package(int num_input_ports, int L_samples) : gr_sync_decimator( "package", gr_make_io_signature(2, 5, sizeof(gr_complex)), gr_make_io_signature(1, 1 , num_input_ports*num_input_ports*sizeof(gr_complexd)), L_samples

Re: [Discuss-gnuradio] Unknown dboard-id

2010-08-06 Thread Josh Blum
DBSRX support is available for the UHD. Modification instructions have been created for dbsrx: http://www.ettus.com/uhd_docs/manual/html/dboards.html#id1 -Josh On 08/04/2010 12:05 PM, Ninja wrote: Hi Josh, Thanks for the info. I just understand the different of UHD based and USRP2-gnuradio,

Re: [Discuss-gnuradio] USRP2 Transmit Power

2010-08-06 Thread Marcus D. Leech
On 08/06/2010 02:32 PM, Sylvain Munaut wrote: > > You are connection the output of one RFX _directly_ to the input of > another one ??? Without attenuators ? > > that doesn't sound wise. > > > Cheers, > > Sylvain > > > Indeed, the LNA in the receive chain on many of the boards will have a ha

Re: [Discuss-gnuradio] USRP2 Transmit Power

2010-08-06 Thread Sylvain Munaut
> We are trying to transmit a carrier using a USRP2 board (done using the > USRP2 constant source example in the UHD branch) and then measure the > received power by using the FFT via another USRP2 board directly connected > to it. You are connection the output of one RFX _directly_ to the input

[Discuss-gnuradio] Flex 900 Common Daughter Board

2010-08-06 Thread Sean Jordan
I am using the Flex 900 Common Daughter Board for the usrp. I am using both boards as recievers. The connection RX2 on the board will not work when connected and selected by the dual source usrp in GRC. However, if I select the TX/RX and reconnect my line to that port it will work. I am wondering w

Re: [Discuss-gnuradio] USRP2 Transmit Power

2010-08-06 Thread Jason Abele
On Fri, Aug 6, 2010 at 9:54 AM, MarcW wrote: > We are trying to transmit a carrier using a USRP2 board (done using the > USRP2 constant source example in the UHD branch) and then measure the > received power by using the FFT via another USRP2 board directly connected > to it. However, the fft show

[Discuss-gnuradio] Conditional block instantiation within GRC

2010-08-06 Thread Marcus D. Leech
I have GRC-based flowgraph where I'd like to be able to turn off the graphical blocks, to save CPU. Ideally, I'd like to be able to pass a command-line parameter that controls whether certain blocks are instantiated and connected into the flow-graph. I know there's a "disable" mechanism within

Re: [Discuss-gnuradio] what does the "corresponds to DC in the IF"mean?

2010-08-06 Thread Josh Blum
On 08/06/2010 12:57 AM, intermilan wrote: Thanks for the answer. Is that mean if I set the center frequency at 2.5G(RFX2400),the DC is also at 2.5G?or other values? Maybe Due to hardware limitations, the daughterboard may not always achieve the desired center frequency, and will therefor

Re: [Discuss-gnuradio] Using gr_sync_decimator [was: How to use forecast()?]

2010-08-06 Thread Eric Blossom
On Fri, Aug 06, 2010 at 06:32:32AM -0700, Sammour wrote: > > Hi Eric, > I have a similar issue as the one described above and I have read some of > the examples in the directory provided but they seem to be different from > what I want to implement. I want to collect L samples from N channels and

[Discuss-gnuradio] USRP2 Transmit Power

2010-08-06 Thread MarcW
Dear all, We are trying to transmit a carrier using a USRP2 board (done using the USRP2 constant source example in the UHD branch) and then measure the received power by using the FFT via another USRP2 board directly connected to it. However, the fft shows a lower power than specified in the data

Re: [Discuss-gnuradio] Free Signal Analysis Tool

2010-08-06 Thread Moeller
On 06.08.2010 07:02, Alexander Chemeris wrote: > Ccheck out Octave - it's an opens-source replacement for Matlab. It's > far behind Matlab in usability, but still may suffice you. It's not far behind. The core functions are really Ok. You get lots of toolboxes in octave-forge for free. Many funct

Re: [Discuss-gnuradio] How to use forecast()?

2010-08-06 Thread Sammour
Hi Eric, I have a similar issue as the one described above and I have read some of the examples in the directory provided but they seem to be different from what I want to implement. I want to collect L samples from N channels and store them in a buffer, do processing and output a vector of length

Re: [Discuss-gnuradio] Brief tags describing each source file

2010-08-06 Thread Moeller
On 06.08.2010 00:30, John Gilmore wrote: > When I was maintaining GDB, I found it very handy to put a one-line > comment at the top of each file, like this: > > % head -1 c*.[ch] > ==> c-exp.c <== > /* A Bison parser, made by GNU Bison 1.875c. */ This is not a replacement for a comprehensive doxy

Re: [Discuss-gnuradio] Brief tags describing each source file

2010-08-06 Thread Moeller
On 06.08.2010 00:30, John Gilmore wrote: > When I was maintaining GDB, I found it very handy to put a one-line > comment at the top of each file, like this: > > % head -1 c*.[ch] > ==> c-exp.c <== > /* A Bison parser, made by GNU Bison 1.875c. */ This is not a replacement for a comprehensive doxy

Re: [Discuss-gnuradio] The USRP2 is not recognized by the computer.

2010-08-06 Thread Matthias Wilhelm
Hi, the USRP2 uses ethernet to communicate with the host, I think you are following the USRP1 procedure, it connects via USB to the host. Try the following: http://gnuradio.org/redmine/wiki/gnuradio/USRP2UserFAQ#Any-hints-for-getting-started-In-particular-what-needs-to-be-done-to-talk-to-the-usr

[Discuss-gnuradio] The USRP2 is not recognized by the computer.

2010-08-06 Thread Mark Hemmerlein
Hi all I am new to gnuradio and Ubuntu. I am trying to install the GNU Radio and am following the procedure in gnuradio.org.  I am at the point where I am checking to see if the USRP2 is recognized by the computer. When I enter the command:    ls -lR /dev/bus/usb  |  grep usrp I don't get a res

Re: [Discuss-gnuradio] Need HELP - Modifying gr_peak_detector

2010-08-06 Thread Phong Do
Hello again, I have modified a new cc code gr_peak_detector3_fb. But it was said that: 'd_look_ahead_remaining’ was not declared in this scope. Can anyone please have a look at it ? Thank you Regards Phong Do http://old.nabble.com/file/p29356431/gr_peak_detector3_fb.cc gr_peak_detector3_fb.cc

RE: [Discuss-gnuradio] doubt about the tune()

2010-08-06 Thread intermilan
Thanks again. I have found the code.But what I want to know is why the value of the LO offset is automatic set at 4M. Why not other values?Is there any reasons for it? Thank you. >

RE: [Discuss-gnuradio] what does the "corresponds to DC in the IF"mean?

2010-08-06 Thread intermilan
Thanks for the answer. Is that mean if I set the center frequency at 2.5G(RFX2400),the DC is also at 2.5G?or other values? Thank you > Date: Thu, 5 Aug 2010 10:15:43 -0500 > Subject: Re: