Yes, if I remember it right the executor only checks a source for output space
and then calls work. If the work function doesn't produce any output it's
broken according to the executor code.
/Ulrika
-Original Message-
From: discuss-gnuradio-bounces+ulrika.uppman=foi...@gnu.org
Hi Matt
Can you please confirm by input level you are referring to the input to
the transceiver daughterboard? I am using the XCVR2450, for over-the-air
reception. The input level (to the XCVR2450 at the receiver) would have
been roughly:
Tx Power (max. 20 dBm as per
I have a query regarding flow graph in GRC.
I am trying to get spectrum from DBS_RX daughter board using GRC. I have used
three blocks as
USRP2 Source -- FFT Filter -- FFT Sink
They have following parameters,
USRP2 Source:
Decimation 1M
Frequency 1G
Gain (dB) 0
FFT Filter:
Decimation 1
Taps
On Sun, Apr 11, 2010 at 04:55:23PM -0400, Kurt Holmquist wrote:
I'm looking for some information or references on what to do _after_ doing
everything in the how to write a block tutorial in order to be able to
access this block from other GNU radio python programs, for example changes
Hi,I use file sink in GRC and Random Source,and want to see the data with
read_short_binary.m in Octave, but it appears like this:octave:10
a1=read_short_binary('a.dat',1e5)
warning: broken pipe -- some output may be lost.
So what's wrong?
Thank you.
Brooke
Hi all,
I have a USRP2 and a BasicRX. I am new to GNURadio and I am still
learning. I have successfully tested the USRP2 with BasicRX. What I
have read so far the BasicRX is capable of receiving RF signals from
1-300MHz. But on the FFT window generated by the GRC, it will only
display up to
Hi Umair
I believe the decimation factor you have chosen is beyond the maximum
allowed (I think, from memory this is 512, which is well less than 1M =
1 times 10^6).
It seems you are trying to sample the passband signal to show a spectrum
at 1 GHz, however a digital-down conversion is performed
your samples rates do not match:
usrp2 rate is 100e6/1e6
fft sink rate: 2e3
-Josh
On 04/12/2010 12:29 AM, Umair Naeem wrote:
I have a query regarding flow graph in GRC.
I am trying to get spectrum from DBS_RX daughter board using GRC. I have used
three blocks as
USRP2 Source -- FFT Filter
Hi All
I am developing a board with gnuradio which is like USRP. It is also use
FX2LP(CY7C68013a) and AD9862, and I add some surroundings.
I hope that my board can work well with gnuradio, but it seems like it can
only support USRP now. So could you please give me some help, if I want to
run
Hi,
i read the Paper High-Performance SDR: GNU Radio and the IBM Cell Broadband
Engine (http://www.ece.umd.edu/~goergen/docs/sdr-gcell.pdf)
and under point 4.3.1 the paper says: At this time, all SPEs run the same
code, though in the future we expect to dynamically load code into the SPEs
Deal all,
in Aalborg University we received last Thursday 3 USRP2 and 3 daughterboards
XCVR2450. We started to test them, by running usrp2_fft.py, and in a first
moment the output was:
usrp2: channel 0 not receiving
usrp2::rx_sample() failed
then, according to the suggestions done to another
On 3/7/2010 3:31 PM, Eric Blossom wrote:
On Thu, Mar 04, 2010 at 02:45:54PM -0500, Jakub Moskal wrote:
Hi everyone,
I am trying to use the GNU-Radio+USRP to implement a cognitive radio
use case in which radios exchange information (XML-based documents)
between each other in order to
Tom,
That is actually what I was going to do. I installed Ubuntu as a dual
boot on my Mac and I must say the installation of gnuradio went very
smooth, much faster than on the OSX. Too bad this approach is not
platform-independent, although it will do for now.
Thank you for the advice!
Jakub
On
Hi,
I think the get fences error is an OpenGL/Video Driver thing, I've seen it
when using a laptop with an Intel GMA video chip and just ignored it as
things still seemed to work.
Can you see a noise floor?
Which RF Port are you using on the XCVR2450? (i.e tx/rx or rx only?)
Cheers,
Tim
On
Thanks for reply. I had one more question, if I was just monitoring the usage
of channel (it is being used or not at any moment), do I still need to write
complex gnuradio scripts? My guess would be that it should be easy to write
corresponding scripts since I am not trying to decipher received
Hi,
I have questions about the parameters in the DBPSK and Low Pass Filter blocks
in GRC.
Low Pass Filter block:
1) If I set the lowpass filter block to interpolate by a factor of 10
should the sampling rate parameter by set to the input sampling rate or the
output sampling rate since they
On Mon, Apr 12, 2010 at 04:02:43PM +0800, Liang Xin 梁昕 wrote:
Hi All
I am developing a board with gnuradio which is like USRP. It is also use
FX2LP(CY7C68013a) and AD9862, and I add some surroundings.
I hope that my board can work well with gnuradio, but it seems like it can
only support
Did you ever make these changes to the portfile for wxgui?
@(^.^)@ Ed
Michael Dickens wrote:
Hi Ed - Thanks for the feedback, it's useful; I don't mind being
wrong! I'll have to set up my Mac to do multi-boot (10.5 and 10.6) in
order to further test this issue out. That said, the kernel
On 4/12/2010 3:25 PM, David Barton wrote:
Hi,
I have questions about the parameters in the DBPSK and Low Pass Filter
blocks in GRC.
Low Pass Filter block:
1) If I set the lowpass filter block to interpolate by a factor of 10
should the sampling rate parameter by set to the input sampling rate
Hi Ed - I never got multi-boot installed, so, no, I haven't gotten
those changes in place. That said, the MacPorts folks are discussing
ways to get WX stuff to be 64-bit compatible under 10.6, so I might
not need to do anything if they succeed soon enough. How badly do you
want / need
This is Auburn University's Software Defined Radio Senior Design Team,
Our goals are to receive and output FM Radio (which we currently have working)
and also to Receive, Decode, and Display HDTV through SDR.
We have a USRP1, USRP2, a WBX and a TVRX card, using any combination of this
Hi all,
I've encountered an issue while running usrp2_fft.py with a dbsrx
daughterboard and I was looking for some insight as to what the cause
is (and a pointer towards a solution if one exists).
When I launch usrp2_fft.py with my dbsrx daughterboard installed, the
system comes up just fine and
I run the following comamnd:
./multi_rx_streaming_samples -e eth1 -f 5.180G -d 4 -g 20 -N 10 -v -o
newtest
However, frequency is not set as 5.180G. Basebad_freq is still set to 0.
Also, it stuck after 'Receiving 10 samples' and never end..
Anyone has any idea?
I appreciate if anyone can
Please check line 113 of benchmark_tx.py
data = (pkt_size - 2) * chr(pktno 0xff)
Therefore, only the LSB 8 bit of pktno is transmitted in the payload.
And please note 257=0x0101, 514=0x0202. So they are payload contents for
packet 1 and 2, respectively.
You've just missed packet 0. Not quite
Matt,
In our effort to distill the gemac core and related logic, we have
pulled out the following module under u2_core
SERDES, Dsp core, UART, external RAM interface and the buffer pool
The mac is all contained in simple_gemac, and above that in
simple_gemac_wrapper:
which is instantiated in
Hi,
I am writing a new c++ signal processing block and wondering if I can
use existing gnuradio modules in this new module. I know reuse c++
modules in python is easy via swig. When it comes to reusing in c++,
what is the best way? I can think of inheritance. But what if I want to
use
Hi Brian,
Thank you for the reply. I apologize but I could not very well understand
the method you suggested. I have not explored much with GNU radio. Could you
elaborate more and help me in this regard. I appreciate your time and help.
Regards,
Neha.
On Sun, Apr 11, 2010 at 10:12 AM, Brian
Hi Umair
There is a setting in the USRP2 source block that lets you set the
carrier frequency. This should be 1e9 (i.e. 1G).
What is the signal you are trying to receive?
Ian
-Original Message-
From: Umair Naeem [mailto:ar...@student.chalmers.se]
Sent: Monday, 12 April 2010 8:22 PM
On Mon, Apr 12, 2010 at 4:32 PM, Kurt Holmquist
kurtholmqu...@hotmail.comwrote:
Thank you for the response.
I would like to use as GRC blocks the blocks that I create as described in
How to Write a Signal Processing Block. This is a somewhat unconventional
situation in that I need a way
Hi All
I have been studying up on the Costas loop, and have a couple of queries as to
the benchmark_tx.py and benchmark_rx.py as a result.
Firstly, for BPSK, there should in theory be a 180 deg. phase ambiguity when
using a Costas loop. Why does this not seem to occur with the benchmark_rx.py
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