se qtgui_sink_c with c++ code? I googled around
but I didn't see any examples that use it.
thanks,
stephen
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On 5/19/2012 3:00 PM, Tom Rondeau wrote:
>
> people think that it feels strange. It started off at 10 fps. What's
> really strange is why I never exposed this setting as a public
> accessor...
>
There is a public set_update_time routine. Changing it to a faster
update does make it seem less st
ke the qt sink out it never aborts.
I also see a performance difference when using grc. If I create a simple
flowgraph with just a usrp sink and a gui fft window I can use higher
sampling rates with the wxwidget version before I hit overruns.
stephen
_
looked in the library that has that routine using nm and it is there
libgnuradio-qtgui-3.6.1git.so:000172f0 t
FrequencyDisplayPlot::set_yaxis(double, double)
libgnuradio-qtgui.so:000172f0 t
FrequencyDisplayPlot::set_yaxis(double, double)
so wh
On 5/20/2012 4:44 PM, Tom Rondeau wrote:
>
> Can you send any info or messages when your program aborts?
>
Segmentation fault (core dumped)
Process returned 139 (0x8B)
sometimes there is a core file and sometimes there isn't.
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>
> Can you send any info or messages when your program aborts?
>
> Tom
It does not appear to happen if I run in the debugger. I've tried many
times but never go it to happen in the debugger.
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source. But it's
aborting in the call my_qtgui_ptr->qwidget()->show()
It doesn't happen in the debugger so I put cout lines all over the
place. I see the output before the show() call but not the output after.
I use a boost threat boost::thread to create
On 5/22/2012 8:38 AM, Tom Rondeau wrote:
>
> Stephen,
> I'm not sure what's going wrong there, but that set_yaxis is exposed
> through the SpectrumGUIClass as "SetFrequencyAxis", which is called
> via the qtgui_sink_{c,f} as "set_frequency_axis". Ca
uild-gnuradio.
>
> Cheers
>
I ran it a few weeks ago before you updated it to support 12.04. I just
had to change where the version is checked and manually install two
packages that the script could not install. One was comedi. I forgot the
other. It worked find after that. This was on
was changed so that the
> function exposed in GNU Radio is in the non-CamelCase style we use).
>
> Tom
Now I remember how I missed this. I was wanting to change the y axis,
the decibel values, not the x axis, frequency. So I didn't look at that
routine
io that would make that stop working?
stephen
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everything in c++ so thats not a problem.
stephen
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ewhere in the process of making a top block and
a usrp source block and connecting the flow graph together. Doing that
causes my redirection to stop working. If I create the blocks and
connect them together first and then redirect stdout it stays redirected.
stephen
_
Hi,
I have several processing chains I need to switch in and out of my flow
graph. What I have is several chains that look like
filter1->quad_demod1-> ...
filter2->quad_demod2-> ...
Can I not connect the chains together first and then just switch them in
and out ?
Say chain 2 was the one conne
ter block I can call
set_center_freq and in the demod block I can call set_gain. Both of
those calls work.
stephen
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On 6/16/2012 11:29 AM, Josh Blum wrote:
>
> You may want to checkout the stream selector block in this project, as
> opposed to stopping and disconnecting:
> https://github.com/guruofquality/grextras/wiki#wiki-list-of-blocks-in-this-project
>
that looks like it will do exactly what i need. But
resampler base block in both the grc flow graph and my c++ code and I
could not get it to work in either. What's the difference between the two?
Stephen
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don't see them ever put into the message. Am I not understanding
something or are strings the only message data that works?
stephen
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But
that has always been due to a problem with my application.
stephen
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It would be nice if there was a software way to reset that. When I start
getting the error I have to cycle power on my usrp.
stephen
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Hi,
I was using 3.6 with no issues. Today I updated to 3.6.3 and get the
following error when I try to start the flowgraph. I did rebuild all
parts of my application.
terminate called after throwing an instance of 'Using Volk machine:
sse4_1_64_orc
std::invalid_argument'
what(): gr_buffer_add
On 10/14/2012 12:06 PM, Josh Blum wrote:
>
>
>
> set_history needs to be at least 1.
>
> (because this actually means a history of user_history_setting-1 is
> prepended to the start of the buffer)
>
> -josh
>
thanks for the reply but I don't know what that means. What is
set_history? I don
could be causing the problem?
thanks,
stephen
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s and pops. I
had played with the various rates till I got the final audio decimation
very close to an integer value but not quite. The integer value used was
a little lower than needed. I adjusted things some more and got a set of
rates that resulted in an integer decimation for the audio lp filte
adds a small amount of hiss. I also
tried the fractional resampler. It added a lot of hiss and a high pitch
whine. The polyphase arbitrary resampler added a more hiss than the
fractional interpolator but less than the fractional resampler.
stephen
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On 8/6/2013 8:15 PM, Marcus D. Leech wrote:
> On 08/06/2013 09:07 PM, Stephen wrote:
>>> I tend to use the fractional interpolator--you can get exact rate
>>> matching that way. It doesn't seem that expensive, particularly when I
>>> use it at the
>>&g
try struct.unpack()
On Tue, Sep 8, 2015 at 11:17 AM, Daniel Mazzer wrote:
> Hello,
>
> I have a flowgraph that send ZMQ PUB messages generated by a custom
> OOT block. The messages transmitted by GNURadio ZMQ PUB block are
> received by a Python application, using a standard ZMQ Library.
>
> [cu
display I
am inspecting.
I assume many others have done this? How is it accomplished and what tips,
tricks and warnings would you offer?
Best Regards,
Stephen Berger
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https
s can find the modifications they need to make to their USB?
Best Regards,
Stephen Berger
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/casper/vmlinuz.efi boot=casper integrity-check quiet
splash --
initrd /casper/initrd.lz
}
Best Regards,
Stephen Berger
From: John Petrich [mailto:petr...@u.washington.edu]
Sent: Sunday, February 14, 2016 12:43 PM
To: stephen.berger.temconsult...@gmail.com
S
t purposes, each of those becomes important. It would be
wonderful in GNURadio to be able to select the best one for a given
measurement.
Best Regards,
Stephen Berger
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time of time and
the process ends up requiring 2 to 4 different programs by the time you
record, edit and have your file ready for presentation. It would be a time
savings to save it directly.
Best Regards,
Stephen Berger
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are trying to do and I expect we
can compare note on various aspects of the implementation.
Best Regards,
Stephen Berger
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Dan,
That sounds like a useful approach but isn’t something I have any experience
with. Can you go into more detail on how you prepared the file with the
decimated vectors and then what the process is to plot it?
Best Regards,
Stephen Berger
TEM Consulting, LP
Web Site - <h
bandwidths that my product might use.
Best Regards,
Stephen Berger
TEM Consulting, LP
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How are people getting down there? Shuttle?
On Sun, Mar 13, 2016 at 4:57 PM, Tom Rondeau wrote:
> Once again, for anyone in area, we will be having a GNU Radio Meetup at
> the American Tap Room in Reston Town center this Tuesday starting at 7:30.
> While we're in town for WinnComm'16, you do not
Anyone meeting in the lobby to get the shuttle? Time?
On Tue, Mar 15, 2016 at 3:33 PM, Tom Rondeau wrote:
> Generally shuttle or carpooling.
>
> Tom
>
> Sent from my phone
>
> On Mar 15, 2016, at 6:21 PM, Stephen Harrison
> wrote:
>
> How are people getting down t
te. I would love to hear thoughts on how to
make the on-ramp shorter and smoother. Essentially, where does more work do
the most good on this topic?
Best Regards,
Stephen Berger
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ed to work for any given kernel. I’m about
to test to see if in place ops works for my use case now. I’ll report back.
-Stephen
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stream blocks change the scheduler behavior w.r.t
max_noutput_items?
-Stephen
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Answering “question” #1 that I asked below: it looks like I can use
gr::uhd::amsg_source to get the UHD async_metadata_t. I will experiment with
that for now, but questions #2 and #3 still stand for me.
> On May 2, 2017, at 16:33, Stephen Larew wrote:
>
> I am having trouble
clock and that is working well.
-Stephen
> On May 9, 2017, at 23:58, U L wrote:
>
> I'm surprised no one responded to this. My group has had some experience
> with this.
>
> We found latency can be extremely large for packetized transmits, especially
> if the p
Hi Roland,
I have used the method you suggest in the distant past to match sample
rates of audio hardware with nominally equal but independent clocks. I
found it worked "ok" as long as the resampler you are using can handle
small dynamic offsets ie: +/- 0.1Hz without noticeable artifacts. The FIFO
I've noticed this issue as well, I think tagged_stream_align does an
add_item_tag but the original tag also passes through.
I'm trying to do a similar thing to what Laur describes.
On Wed, Jul 15, 2015 at 11:48 AM, Martin Braun
wrote:
> On 15.07.2015 05:39, Laur Joost wrote:
> > Hi!
> >
> > I'
A simple way in GNURadio is to use the frequency xlating fir filter to
select individual channels.
On Tue, Jul 21, 2015 at 8:39 AM, Markus Heller wrote:
> Dear list,
>
> I'd like to understand how to receive the 2m band as one wideband input
> (144-146 MHz) and afterwards split the sample stream
age just fine.
What am I missing?
Thanks,
Stephen Andrew
Undergraduate, Electrical Engineering
Missouri University of Science and Technology
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sending a message, it only needs to
be sent once, not repeated.
Thanks,
Stephen Andrew
Undergraduate, Electrical Engineering
Missouri University of Science and Technology
On Wed, Mar 26, 2014 at 4:45 AM, Martin Braun wrote:
> On 03/26/2014 08:32 AM, Stephen Andrew wrote:
> > Hello,
&g
gives me the correct file on the output, but when I turn
off "repeat" in the file source, I get no output.
Why is repeat magical, and why did I have to packetize my file before
sending? Shouldn't it have just sent as a stream of bits without packets?
Thanks,
Stephen Andrew
Under
I get the same error.
Is uhd.dll really the file I need, or is it _uhd_swig.pyd (which I'm
assuming to be a library, since it looks like gobbledy gook in
notepad)
Thanks,
Stephen Andrew
Undergraduate, Electrical Engineering
Missouri University of Science and Technology
_
I did this exact experiment about a year ago. It's caused by the resolution
of the phase accumulator in the DDC.
On Tue, Jun 17, 2014 at 2:09 PM, Marcus D. Leech wrote:
> On 06/17/2014 04:56 PM, Daniele Nicolodi wrote:
>
>>
>> I'll try to see if this makes a difference. The minimum sampling rat
Just some quick calculations in python:
exact phase increment for 10 MHz:
>>> (10e6/100e6)*2**32
429496729.6
Closest phase increment:
>>> np.round((10e6/100e6)*2**32)
429496730.0
Resulting frequency:
>>> (np.round(10e6/100e6*2**32)/2**32)*100e6
1000.009313226
We are out by 9.3mHz!
On T
don't know much about how signal processing
> is done in FPGAs). If this is the case, as I understand from Stephen
> email, now I know where the frequency error comes from.
>
> On the other hand, I think that the fact that the sine is computed via
> the CORDIC method may in
errors
in both amplitude and phase but you are right, this is not the cause of the
frequency offset you observe.
On Tue, Jun 17, 2014 at 4:09 PM, Stephen Harrison
wrote:
> The Verilog source for the USRP N210 is available online. You can see this
> in ddc_chain.v:
>
> wire [31:
I did an experiment similar to this a year or so ago. I synced all the
USRPs to the same 10MHz and PPS. I had pretty good results using libgps to
get the GPS time and then using UHD to start streaming on a particular PPS
edge on all units. With LFRX boards this will ensure that the DDCs start at
th
Hi Sean,
Is the Linaro distribution possible on MicroZed? I spent a long time trying
to get OpenEmbedded to happen with no success. The Linaro distribution was
a snap and I got GNURadio running no problem on the ZedBoard.
Stephen
On Sat, Aug 23, 2014 at 6:55 PM, West, Nathan
wrote:
> On
27;constellation_decoder_cb', argument 1 of type
'digital_constellation_sptr'
Any help would be appreciated, I am using GNURadio 3.6.5.
Regards,
Stephen
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allows it to work
this way, so I am confused.
Regards,
Stephen
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I had the same problem, but realized I was using the GRC .xml definitions
from the previous version (in /usr/local/share/gnuradio/blocks).
On Thu, Jul 4, 2013 at 2:12 PM, Tom Rondeau wrote:
> On Thu, Jul 4, 2013 at 4:58 PM, Andrew Davis
> wrote:
> > Hello all,
> >
> > I'm using Xubuntu 13.04 a
The XML for filter_rational_resampler_xxx sets the default value of Taps to
None. However, this gives the error Expression "[None]" is invalid for type
complex vector.
Deleting "None" from this box fixes the problem. Is it safe to change my
XML definition to have no default value?
Is it just me or did the polarity of the frequency offset in
freq_xlating_fir_filter get reversed between 3.6 and 3.7?
On Thu, Aug 8, 2013 at 6:04 AM, Anton Komarov wrote:
> Who can help me to open a ticket?
>
>
> On Wed, Aug 7, 2013 at 4:53 PM, Anton Komarov wrote:
>
>> Ok, but it is not clea
I agree.. the new way is more intuitive but then again it broke a bunch of
my GRC patches.. :)
On Thu, Aug 8, 2013 at 1:36 PM, Sylvain Munaut <246...@gmail.com> wrote:
> Hi,
>
> > The "old style" version of the block in gnuradio-core in 3.6.5.1 works
> > correctly. The "new style" version of th
an I start with debugging this issue?
Thanks,
Stephen
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.10 w/ reiserfs, and then after seeing a post on the mailing-list
we switched to using xfs
- GnuRadio v.3.2.2
- and the git on the bleeding edge of GnuRadio
We have tried using both the USRP1 and the USRP2 but with the same problems.
Thanks,
Stephen Branch and Bobby Black
bran...@aubur
y test.mpeg
Problems:
/tmp/atsc_pipe_5 never fills with data.
The output file, 'test.mpeg' is empty.
Question #2) What do we need to fix to get /tmp/atsc_pipe_5 to fill.
Question #3) What do we need to fix to get temp.mpeg to fill.
Thank you,
Bobby Black & Stephen Branch
blac...@aub
>>> Tom Rondeau 04/20/10 9:58 AM >>>
On Mon, Apr 19, 2010 at 8:12 PM, Stephen Branch wrote:
> Hello everyone,
>
> I am part of Auburn University's Software Defined Radio Senior Design team,
>
> Software being used:
> Ubuntu v.9.10 on xfs partition
&g
…… They worked !
Butswitched back to GNURadio 3.9xx andthings broke…….Is this
normal?
Thank you all for a wonderfulDSP platform.
Stephen
> On Nov 23, 2021, at 5:57 PM, Glen Langston wrote:
>
> Hi Marcus,
>
> However SDRPlay3 only builds
Linux mint 20.3
gnuradio 3.10
compiling from source
tried both git master and maint-3.10 repositories.
Compile fail on make with this error ..
warning: failed to load external entity
"/home/s/Downloads/a/gnuradio/gnuradio-maint-3.10/gr-trellis/docs/docbookx.dtd"
validity error : Could not load
Hi All,
I've been having problems sending a 25 Msym/s BPSK stream between two
USRP2's with XCVR2450 daughterboards. I've tracked it down to the Rx
circuitry limiting the passband to ~14 MHz when at least 20 MHz should
be available.
Sifting through the db_xcvr2450.c/db_xcvr2450.cc files, I th
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