Do you know this site?
https://www.sigidwiki.com/wiki/Signal_Identification_Guide
I had a short peek and could not find anything, but you may have a bit
more patience.
Best
Fabian
Am 27.09.23 um 13:21 schrieb veso...@gmail.com:
Hello there all, I hope someone can help me
I am trying to wat
Hi,
is there a way in GRC to get a rolling time sink?
That means no trigger, the signal just scrolls from right to left.
Best,
Fabian
Hi,
my guess would be that the file source and UDP sink are much faster than
the UDP source and QT GUI Sink. As UDP is "fire and forget", the
"transmitter" may be pushing more data over the network than the QT GUI
Sink can handle.
To test this, you can replace the QT GUI Sink with a NULL sink,
improve on, but its a starting point.
Am 07.05.23 um 13:09 schrieb Fabian Schwartau:
Hi again,
as I described earlier, I am now using a "Tags Strobe" block to
periodically tag the data with the current gps coordinates. Within the
"Tag Strobes" I use a function call to
f float32 (and then not double the count), you'd get it
interpreted exactly that way :)
Cheers,
Marcus
On 04.05.23 19:38, Fabian Schwartau wrote:
Sorry again, never mind... I found the problem.
The source code for reading the data does not include the fact that I
am reading complex data a
#x27;, offset=0)
and everything seems to work as expected. Now I just have to figure out
how the data is ordered in that blob ;)
Best,
Fabian
Am 04.05.23 um 19:19 schrieb Fabian Schwartau:
Hi everyone,
I think I got hit by https://github.com/gnuradio/gnuradio/issues/5568.
Exactly the same err
Exactly, and there are some nice examples in the documentation :)
Thanks a lot!
Am 03.05.23 um 21:01 schrieb Marcus D. Leech:
On 03/05/2023 14:59, Fabian Schwartau wrote:
Sorry, forget it. Wrong sink...
You probably want:
https://wiki.gnuradio.org/index.php/File_Meta_Sink
Am 03.05.23 um 20
Sorry, forget it. Wrong sink...
Am 03.05.23 um 20:52 schrieb Fabian Schwartau:
OK, I think I found an easier way (at least for me), without having to
write my own module - never done that.
I used the "Tags Strobe" block in combination with the "Python Module"
for my gps_get
to add
that PMT to the first sample in your output buffer.
You'd feed the result into a metadata file sink block: That saves things
in a serialized format ready for retrieval.
Best,
Marcus
On 5/3/23 19:52, Fabian Schwartau wrote:
Hi everyone,
I am trying to record some data from an SDR
hat PMT to the first sample in your output buffer.
You'd feed the result into a metadata file sink block: That saves things
in a serialized format ready for retrieval.
Best,
Marcus
On 5/3/23 19:52, Fabian Schwartau wrote:
Hi everyone,
I am trying to record some data from an SDR and wou
Hi everyone,
I am trying to record some data from an SDR and would like to sync/tag
the data with the current gps position from gpsd. I am kind of stuck and
don't know how a possible solution for that might look like in grc.
I have a python function that gets the current position as a tuple, bu
Hi Ahmad,
I think both, sink and source, start consuming/producing samples as fast
as they can. If the buffer for a hardware sink runs empty, you will get
"U"s printed in the command line, for under-run. If a buffer after a
hardware source runs full, you will get "O"s printed, for over-run.
If
Hi Robert,
I just tried this myself and hat similar problems with my hackRF, which
I could solve by updating its firmware, which was way too old for the
library I was using.
After updating the firmware, your flowgraph works. So the problem is not
the flow graph, but more likely your system, dri
Hi Robert,
use "QT GUI Frequency Sink" and "QT GUI Time Sink" instead.
Best,
Fabian
Am 28.02.23 um 09:57 schrieb web.m...@gmx.ch:
Hi
i found this video on youtube.
Unfortunately, the WX GUI is no longer available.
What can I use to recreate this setup.
https://www.youtube.com/watch?v=IOKOJ
Am 03.02.23 um 17:08 schrieb Marcus D. Leech:
On 03/02/2023 11:04, Fabian Schwartau wrote:
Hi George,
I don't know if the Frequency sink can do that for you, but I guess it
cannot.
One way is to mix the signal with a complex oscillation and a
multiplier with the oscillator running a
Hi George,
I don't know if the Frequency sink can do that for you, but I guess it
cannot.
One way is to mix the signal with a complex oscillation and a multiplier
with the oscillator running at the negative frequency you wish to
downshift the signal. Then low-pass filter and downsample the sig
Hi Joshua,
the most important questions are:
Can you live with less than 50 M updates/second of the PWM?
How much error in the output PWM is acceptable?
If you need the 50 M updates/s and you want the PWM to be high precision
(like 8 bit resolution or something like that), I would say: Forget it
Ohh... bandwidth is just half the sample rate of course. So the cutoff
has to be 50k and transition 20k for example.
Am 21.07.22 um 10:45 schrieb Fabian Schwartau:
Hi Isaac,
I am not sure what you are trying to achive. However, your low pass
filter seems to be set up incorrectly. You have a
Hi Isaac,
I am not sure what you are trying to achive. However, your low pass
filter seems to be set up incorrectly. You have a signal with 1MHz and
10MHz samplerate. Your low-pass filter has a cutoff at 5MHz and then
down-samples by 100. If you want to make sure that there are no
frequency c
Hi Isaac,
I am not sure what you are trying to achive. However, your low pass
filter seems to be set up incorrectly. You have a signal with 1MHz and
10MHz samplerate. Your low-pass filter has a cutoff at 5MHz and then
down-samples by 100. If you want to make sure that there are no
frequency c
Hi Diren,
I am not exactly sure what your problem is.
What you should know: gnuradio does not inherently has any sample rate
(unlike Simulink for example). Each block receives samples, processes
them, and outputs the same number of samples as fast as it can (except
if the block is interpolatin
Sink,
For now the problem seems to be due to Qt Freq Sink small number of FFT
points.
Maybe you can advice me with any other Gui spectrum block? As you have
probably noticed - I am very new to GNU Radio.
Thanks in advance,
Alexander
On 30.03.2022 10:19, Fabian Schwartau wrote:
Hi Alexand
Hi Alexander,
I see exactly what is shown in the tutorial and I don't see any
harmonics. There are a two "shoulders" left and right to the signal,
which are caused by the window function, which is applied by the
Frequency sink to reduce spectral leakage. When I increase the lower
boundary of
Hi,
did you set the correct frequency? If it is outside the allowed range,
it is expected that the PLL cannot lock.
Best,
Fabian
Am 27.03.22 um 18:46 schrieb Lorenzo Mainardi:
Hello everyone, I am trying to make a cheap USB dongle working with
gnuradio and gnuradio-companion.
I just tried to
Besides hardware-hacking a sound card, you may also use some USB
oscilloscope, in combination with sigrok-cli and its --continuous flag.
I have never used this, but I guess there is a way to stream this data
to gnuradio. Note that not every hardware supports this --continuous
feature! Sadly the
Hi Vittorio,
often you can remove/short the de-coupling caps on soundcards, making
them work down to DC. Maybe thats the easy/simple solution.
Best regards,
Fabian
Am 09.02.22 um 19:07 schrieb vitt...@pm.me:
Good evening everybody
I'm looking for a sampling device, GNURADIO compatible, with
Complex conjugate only inverts the imaginary (Q) part of the signal.
If you want to invert both, just multiply with -1.
Am 13.12.21 um 16:22 schrieb Rachida SAROUI:
Hi everyone,
I need to invert the I and Q of a complex signal. Does the block complex
conjugate do the job?
Thank you
Hi Gerard,
as long as you have the same version on both devices, you should not
have such differences. My guess is, that Debian did not automatically
install some of the dependencies. Do other Qt elements work? Maybe there
are some Qt libraries missing, but I am not a Debian expert. There are
Hi Gerard,
what versions are you using? My guess is that you are using a fairly old
version in Debian, as Debian is a distribution made for stability and is
therefore usually a bit behind.
What warning do you get? Often warnings are just warnings and you can
ignore them ;)
Best regards,
Fabia
Hi,
one thing came to my mind: Don't average the phase, average the complex
value instead. If you have a lot of noise, the phase will jump around
and will also wrap around 2*pi, which will "confuse" the averaging.
After averaging the complex value, convert it to the phase and you are done.
Fa
I am 80% sure that:
When you have only one SDR connected, you don't need to specify
anything. Otherwise you can specify "rtl" or "rtl=0", "rtl=1", ...
Fabian
Am 25.08.21 um 13:56 schrieb Edward Hoover:
I am trying to set up the simple fm receiver tutorial but I can not
figure out the syntax f
There are two conversion blocks called "Char to Float" and "UChar to
Float" - I guess you are looking for the second one. Both take "Byte" as
input.
Am 20.08.21 um 11:24 schrieb Marcin Puchlik:
Conversion from byte to float works wrong (in my opinion) for byte
variables greater than 127. Corre
itself, I should get the RC.
>
>Feel free to correct me if I am wrong. :-)
>
>
>
>(*)
>https://dsp.stackexchange.com/questions/20194/concept-of-combining-multiple-fir-filters-into-1-fir-filter
>
>
>Kristoff
>
>
>
>On 10.08.21 21:01, Fabian Schwartau wrote:
&g
Hi Kristoff,
You can just put an additional RRC in front of it or you can calculate the tabs
by folding die tabs of the RRC with themself. There is probably a numpy
function to do that. Have not tested any of that, but both ways should do the
trick.
Fabian
Am 10. August 2021 20:44:05 MESZ schr
You are welcome, glad I could help :)
The list is mirrored here:
https://lists.gnu.org/archive/html/discuss-gnuradio/ Read-only, of course.
Fabian
Am 09.07.21 um 14:28 schrieb Phil Wiggum:
> Hi Fabian!
>
> Yes I Xlating and filter the Bw to 100K and then decimating to SampRate 100k
> to
> be ge
Hi Phil,
I read your post like four times and could not figure out what you are
doing and what you are trying to achieve. Where is your target signal
originally located? At fc? Is fc = 100k? Why do you mix 100k down with
the Frequency Xlating FIR and then define a different center frequency
for you
i G. Dezfuli* mailto:ali69...@gmail.com>>
> Date: Wed, Jun 30, 2021 at 4:56 PM
> Subject: Re: spectrum analyzer problem
> To: Fabian Schwartau mailto:fab...@opencode.eu>>
>
>
> thanks a lot, Fabian,
>
> I asked about the mapper itself and not pulse shaping (RRC). Aft
the results. With regards to the Fractional BW
> at TX, I just copied it from some code I found online. Should I change
> it to a different value? *sorry, i am still trying to absorb all the
> concepts*
>
> Regards,
> Bryan
>
>
> On Thu, Jun 24, 2021 at 4:58 PM Fabian Schwa
Hi Bryan,
I just noticed a few things I am not sure about. Maybe I got something
wrong, maybe they are a mistake:
You transmit at 70cm and receive at 2m.
You use a low-pass filter with 5kHz cutoff and allow a maximum deviation
of 5kHz of the NBFM receiver. I am not sure, but I think this is not
op
I haven't looked into the code, but the output is a baseband signal and
its supposed to be. The word baseband implies that you do not shift to a
carrier frequency, so there is no exp(-jwt) term. I guess w is your
angular carrier frequency, which does not exists (its baseband).
Am 07.05.21 um 11:33
Hi Alberto,
Just open a terminal and run
sudo apt install gnuradio
And you should be fine. The dependencies for the rtl-sdr are already included.
It is probably not the latest&greatest version of gnuradio, but IT should get
you started.
Fabian
Am 10. April 2021 21:38:47 MESZ schrieb Alberto All
Hi,
I hope you noticed this note:
note: 'std::shared_ptr' is only available from C++11 onwards
So I guess you need to tell the compiler to use c++11 or a newer variant. I
guess you can do that with the CXXFLAGS, but I don't know how to do that with
cmake.
Fabian
Am 17. Februar 2021 20:55:56 ME
kely that I'll be back with other newbie issues... but
>in
>the meantime I thank you very much for your support,
>all best
>Stefano
>
>
>
>Il giorno sab 13 feb 2021 alle ore 20:47 Fabian Schwartau <
>fab...@opencode.eu> ha scritto:
>
>> Hi Stefano,
1.4) gnuradio 3.7.10
> built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf
> bladerf rfspace airspy soapy redpitaya
>
> - - -
> any other idea to make it working?
> thanks again,
> best regards
>
> Stefano
>
> Il giorno sab 13 feb 2021 alle ore 1
Hi Stefano,
don't worry asking such questions here on the list. That's its purpose I
guess ;)
First of all: I was able to run both of your flowgraphs on my PC with a
HackRF One, so the problem lies somewhere else.
A small google search reavealed no perfect solution, but it indicated
that something
Hi Jay,
There was an email on the mailing list today from someone providing an
installer for 3.8
http://www.gcndevelopment.com/gnuradio/downloads/installers/v3.8.2.1/gnuradio_3.8.2.0_win64.msi
I don't know what the difference to the "normal" version ist. You should check
out the email.
Best rega
If you can reproduce a failing wired keyboard, check what
/var/log/syslog says when it turns off. Use
tail -f /var/log/syslog
to monitor the output continously. There should be some note on what is
going on. A look in the xorg/wayland logs may also help.
Am 13.01.21 um 20:03 schrieb Barry Duggan:
Hi,
should not be too hard to find the info online. Took me about a minute
in archive.org to find this document:
https://web.archive.org/web/20050306022404/http://www.ettus.com:80/downloads/usrp_guide.pdf
It popped up in the download section on their side on the 6th of March
in 2005 and it includes
Hi Bass(e),
can you tell a bit more about what you are doing?
Just starting the USRP, setting it up and stream?
I once had a (at least) similar problem. I can't remember right now
exactly what it was, I can just remember that I did something a bit
ususual. If I remember correctly I was initializing
Hi,
my guess: when repeat is off your source will ouput a single vector. Not
more. As the scope displays 1 second at 1kSPS, you need at least 1000
vectors before the scope will do anything.
Best regards,
Fabian
Am 08.12.20 um 20:05 schrieb Vieeralingaam Ganapathy:
> Hi,
> My flow graph is not dis
ror message. I
> just dont see any QT sink options/blocks inside of “instrumentation”.
> However, all of the WX options are visible.
>
>
>
>> On Dec 7, 2020, at 3:23 PM, Fabian Schwartau wrote:
>>
>> Hi Tellrell,
>>
>> you should provide some more
Hi Tellrell,
you should provide some more details. Where cant you find it? In GRC? Do
you have an error message?
Best regards,
Fabian
Am 07.12.20 um 19:08 schrieb Tellrell White:
> Hello
> I cant seem to find the qt gui time sink in version 3.7.11. I downloaded the
> binary version available fo
rce here for anyone need.
>
>
>
>
> <http://aka.ms/weboutlook>
> ----
> *From:* Discuss-gnuradio
> on
> behalf of Fabian Schwartau
> *Sent:* Friday, December 4, 2020 9:28 PM
> *To:* discuss-g
t the source code. it shows "Param -
> Code(_source_code): Can't interpret source code: non-default argument
> follows default argument (, line 16)"
> how to deal with this?
>
>
> <http://aka.ms/weboutlook>
> -----
Hi James,
three options I can see:
1) Quick& Dirty: Implement both algorithms in parallel and use the Peak
Detector block to generate a 0 or 1 depending on your condition. Then
invert the condition, multiply the outputs of the two algorithms with
the two condition outputs and add them.
2) Dependin
um 19:40 schrieb Marcus D. Leech:
> On 11/21/2020 09:26 AM, Fabian Schwartau wrote:
>> Hi everyone,
>> I would like to built some flow graphs with GRC, but I need to write a
>> few custom python functions which I want to use in the flow graph. For
>> example I n
Hi everyone,
I would like to built some flow graphs with GRC, but I need to write a
few custom python functions which I want to use in the flow graph. For
example I need to generate some filter coefficient and things like that.
I thought I just create a python script in the same folder, define some
Disable the low pass filter, it is filtering out the excepted signal if
the cutoff frequency is 20kHz. Maybe you mixed up the cutoff frequency
and the transistion width.
Am 18.11.20 um 17:21 schrieb Rozana Alam:
> Hi,
> Thank you for your detailed clarification, I am really sorry for all the
> mis
Hi,
I cannot open the grc file, it complains with some parsing error.
However, I am wandering what you did in the screenshot. That makes no
sense to me. You have the BladeRF at 2.4 GHz center frequency with a
sample rate of 61.44 MHz (is that supported by the BladeRF?). Even if,
why are you generat
Hey Hassan,
sorry to be the "bad guy" to ask: Why not do it differently?
Honestly, I did not fully understand what your plan is, but do you know
the concept of FMCW radar? They also send a chirp, receive the echo
(which is exactly what you want to do as far as I understood) and then
you just have
Hi Kristoff,
As some people already pointed out here, it is always good to give
multiple views for the concept of complex numbers, as different minds
work differently and some explanation may push the right buttons for
someone, but not for someone else. Especially for such a complex (pun
intended)
Hi Daniel,
You can probably do that with GNURadio, I mean you can use the basic
processing and display blocks in any Python/C++ (and probably others)
program. But as far as I know there is not much software in GNURadio to
interface the multitude of devices out there.
You should check out (lib)sigr
Hi,
I have the same problem. Seems like this is a more or less valid
security thing. The embedded page needs to set the X-Frame-Options to
SAMEORIGIN in the HTTP header:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options
For some reason the server is sending this setting twic
Depending on what you will do, I would also be interested. Once a month
sounds reasonable.
Am 21.09.20 um 02:55 schrieb Barry Duggan:
> As a result of the CRGon20 Breakout session on Ham Radio, there seems to
> be a lot of enthusiasm for the formation of a monthly group meeting for
> those interes
Hi,
I just checked on my Ubuntu 18.04. It seems like that grc is using
/usr/bin/python as interpreter. This is python2 in this Ubuntu version
(probably other too). Check what "/usr/bin/python --version" tells you.
If it tells you python 3, you changed the default python version. Change
it back (it
*
> ** GSM +39 328 7110193 **
> * SMS +39 328 7110193 *
> *
>
>> -Messaggio originale-
>> Da: Discuss-gnuradio <mailto:alice...@gnu.org>>
>> Per conto di Fabian Schwarta
Hi Vincenzo,
urllib2 is not available in Python3 any more, as far as I know. So this
seens to be a Python2 script. Use
pip2 install PyQt5
to install PyQt, then it should work. Keep in mind that Python2 is out
of date and should not be used any more.
Best regards,
Fabian
Am 01.09.20 um 11:22 schr
Hi,
Did you found this issue on github?
https://github.com/gnuradio/volk/issues/340
If you just want to install and use GNU Radio, ignore it.
Best regards,
Fabian
Am 14. Juni 2020 09:03:53 MESZ schrieb Vincenzo Mone :
>Hello all,
>
>I am installing Gnuradio, but when I give the make test command,
then
>CPU.
>Have a nice weekend.
>
>Thanks again for your help.
>
>Best regards
>Khalil
>
>
>On Sat, 13 Jun 2020 at 12:46, Fabian Schwartau
>wrote:
>
>> Hi,
>> take a look at the second page of the schematic of the Red Pitaya:
>>
>>
>http
Red pitaya how does it processing it? I mean the signal
> as an input to red pitayas CPU should be digital. ''
> Thank you
>
> Best regard
> Khalil
>
>
> On Sat, 13 Jun 2020 at 11:29, Fabian Schwartau <mailto:fab...@opencode.eu>> wrote:
>
Hey Khalil,
first of all: every signal is digital within the computer. What you
probably mean is what this signal represents. The output of a modulator
usually represents an anlog signal. It is of type float (or complex
float) and each sample represents for example a voltage. I don't
understand wh
ies it doesn't work properly.
>
>-- Cinaed
>
>On 6/5/20 12:00 PM, Fabian Schwartau wrote:
>> Hi everyone,
>> just added the gnuradio-releases ppa to my Ubuntu 18.04, made sure
>all
>> old gnuradio is gone and installed it again. Version is 3.8.1.0
>(using
>
Hi everyone,
just added the gnuradio-releases ppa to my Ubuntu 18.04, made sure all
old gnuradio is gone and installed it again. Version is 3.8.1.0 (using
Python 3.6.9).
However, after fiddeling a bit I made a small flow graph using the QAM
modulator, but when I start it, I get:
AttributeError: mod
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