Hello list;
I have been following a thread by Marcus and others about coherent
receivers, etc.
I have a question: Is it possible to change the clock frequency to receive a
slightly lower frequency?
I have some ~ 49.89MHz wireless mic's that I would like to reuse, and an SDR
seems like a
How about these guys ? http://www.thinkrf.com/products.html
They already have a GNURadio compliant product line.
From: discuss-gnuradio-bounces+bill.pretty=xplornet@gnu.org
[mailto:discuss-gnuradio-bounces+bill.pretty=xplornet@gnu.org] On Behalf
Of Edmund Humenberger
Sent:
Hello List;
Could someone tell me what the latest version of GRC is ?
I ask this because a previous thread mentioned that the QT FFT GUI had a
zoom function.
I normally use the other graphical sinks, but I gave it a try and there
didn't seem to be a zoom feature .
Thanks;
Bill
Of William Pretty Security
Sent: Tuesday, October 09, 2012 5:47 PM
To: discuss-gnuradio@gnu.org
Subject: [Discuss-gnuradio] Latest version of GRC ?
Hello List;
Could someone tell me what the latest version of GRC is ?
I ask this because a previous thread mentioned that the QT FFT GUI had
Hello all;
I have a 40KHz carrier that I want to be able to check for modulation.
The 'source' is the audio source in GnuRadio Companion.
I have tried a number of things and nothing seems to work for me.
I have the source, followed by a 40KHz Bandpass filter and a frequency
translating
Andrew;
I did a find -name in my GnuRadio directories and couldn't find any
xorg.conf file.
I found a number of xorg.conf files, but none that seem to relate
specifically to GnuRadio ...
Do I have to create one ??
Bill
-Original Message-
From:
Hello All;
Thanks for all the feedback (wow!) ...
Sounds like I'm hosed :(
I'll just tell the client not to use Persistence for the time being ...
Marcus: How is that ulcer of yours doing? Have you tried decaf ? grin
Later;
Bill
-Original Message-
From:
Hi Marcus, etc.
If I may make a suggestion:
Is there any way to remove/disable the Persistence check box from that
block??
At least until the OpenGL problem is fixed or what ever ??
Bill
-Original Message-
From: discuss-gnuradio-bounces+bill.pretty=xplornet@gnu.org
Hello List;
Senthil suggested I try these links, and they appear to work like a charm !
http://crazylazy.info/blog/?q=content/please-test-gnu-radio-cde-package
http://www.pgbovine.net/cde.html
Here is what I was thinking. What if someone ran GRC and the other
Hello List;
While checking my flow-graph I discovered the following problem with the WX
GUI FFT Sink in
GnuRadio-Companion.
When the flow graph is running and you try to check the Persistance box
you get the following error:
Hello List;
Thanks to Senthil Murugan; I have my immediate problem solved and I can
deliver the
goods to the customer. (And get paid J for the hardware development J .)
So for now the live CD is on the back burner, until I get some spare time .
Later
Bill
Hello List;
I have successfully created a python program using GnuRadio Companion.
When I look at the generated file.py there are a number of import
statements.
Such as from gnuradio import audio, etc.
If I want to run the program on a Linux system with Python support, but
without
Hello List;
For whatever reason I am still getting the same vocoder error when I attempt
to run a GRC flow graph.
I successfully re-installed GnuRadio (According to Marcus's script.) but I
still get the same error.
Hello Group;
I am wondering if anyone has a custom spectrum analyzer block or can tell me
how to build one ??
I know that GRC comes with the FFT GUI Sink, but that is just what it
sounds like.
What I am looking for is a spectrum analyzer type display, where you can set
a start-stop
Hello All;
Well now that I got the audio source working I have another problem.
The sample rate of the audio source is set to 96K (so that I can sample a
40KHz signal).
I have a frequency counter connected across my source, so I know what the
actual frequency is.
When I add or change the
Thanks to All of you for the help J
Now I am into the cosmetic stuff (= just about done) .
With a sample rate of ~90KHz the FFT frequency axis starts at 0 and goes to
~45KHz.
I have a band pass filter from 35KHz to 55KHz.
Does anyone know how to make the frequency axis start at say
Hello Group;
I am trying to use an external USB Audio DAC.
According to the documentation in the audio source block, if I leave the
device name
blank, the block will use the default alsa audio device.
My question is, how do I find out what the name of the USB device is ??
Typing
Hello List;
I would like to know if it is possible to set the sample rate higher than
48KHz in the audio source block of
GRC ?
I have an older version of GRC, and I am wondering if this has changed. I am
attempting to receiver 40KHz
Ultra-sonic signals from an Ultra-Sonic transducer. A
Hello List;
Got the audio block working, and now I have another question.
It has been several years, but I could have sworn that there were X -Y
cursors
that you could display on the FFT (spectrum analyzer) block .
Am I mistaken, or was that another Python application ??
Thanks .
Hello All;
I was wondering if anyone has done any work with auto-detection of
modulation type ?
Not necessarily with the USRP. It is the algorithm that interests me.
Thanks;
Bill
Strategy without tactics is the slowest route to victory.
Tactics without strategy is the noise before defeat.
Hello All;
For financial reasons, I am forced to sell my USRP-1 system.
My loss is you gain :o)
http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem
http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItemitem=130499894015
item=130499894015
Enjoy .
Bill
A prisoner of war is a man who tries to
Just a thought Marten;
Why don't you get a hold of a PCR100 or PCR1000 (ICOM)
I found this one on EBay, but if you surf around a bit you can probably find
a cheaper one for sale on Ham Sites.
http://cgi.ebay.ca/ICOM-PCR-100-ACTUAL-RADIO-UNIT-/200558103112?pt=LH_Defaul
tDomain_0
Believe me guys, I know your pain. Been there done that L
After if figured things out I wrote the attached document. It is a step by
step how-to.
Written by a Windows XP / RF Engineer .
Good luck to you both .
Bill
People sleep peaceably in their beds at night only because
Looks like gnuradio is down again L
Strategy without tactics is the slowest route to victory. Tactics without
strategy is the noise before defeat. Sun Tzu
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Ok Folks;
Haven't spoken to the vendors yet, but here's the board anyway.
The board is actually two circuits. One for the Si590 part and one for the
Pletronics part.
You will see that each board has tracking for two OCXO's, so you can have a
dual frequency source.
This seemed like a lot
Hi All;
It seems that 52MHz /64MHz precision clock references are like hen's teeth,
so I'm working on a design.
What I need to know is what sort of level is the USRP1 looking for ? Is it
3.3V CMOS ?
Once I get the design working, I'll make them available at a reasonable
price J
More Info on the parts I plan to use:
At this point I have two possible fixed frequency parts:
Silicon Labs Si590 series:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=590PC-BDG-
ND name=590PC-BDG-ND
Pletronics
Hi All;
I while back I thought I saw a post about using multiple sheets in GRC.
I think it said something about the top block, but I can't find the post now
L
Does anyone know how to do this ??
Thanks .
Bill
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Discuss-gnuradio mailing
Hi All;
I'm trying to implement an Increment button that when pressed, increments
a variable.
This will be used to increment the tuned frequency by say 1 MHz every time
it is pressed.
I tried a Variable Chooser, configured it as a button and gave it only one
choice. The variable name was
I did what I thought was a standard install from git. However when I tried
to Make I got the attached error.
libtool: Version mismatch error. This is libtool 2.2.6b, but the
libtool: definition of this LT_INIT comes from libtool 2.2.6.
libtool: You should recreate aclocal.m4 with macros
OOPS. Forgot to add the code. Here it is .
Bill
Simple_WBX_Tuner.grc
Description: Binary data
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OK. SO I gave up on scanning for the present time and tried to implement a
simple tuner, using a slider.
I'm thinking this is a REALLY basic thing to do with any kind of receiver
...
No such luck L
The slider still has a mind of its own .
While I haven't tried your block suggestion
Well, it looks like my swept FFT program still needs some tweaking. As
helpful as Marcus was .
I need someone else with a WBX board to test this flow graph.
1)If you set the frequency span to 2300MHz (reasonable for the
WBX) the center frequency jumps to 1.27866GHz immediately
Marcus;
The file you sent me works like a charm !!
A little bit of tweaking and this milestone is done .
Thanks for all the help
Bill
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Everyone on the list has been REALLY helpful, so here is my contribution to
the list.
While I was installing Gnuradio on Ubuntu 9.10, I took careful notes of
everything I did.
This should be complete instructions. Starting from scratch, with a new
install of Ubuntu.
Much of this document
If you are like me, and are running Ubuntu 9.10, you will get a message from
update manager asking if you want to upgrade to 10.04
Unless you own shares in a company that sells RAM, I suggest you pass on the
upgrade L
My test machine ran 9.10 perfectly. I installed 10.04 from a live disk, and
Ok. I've almost got my scanner working, but I have a problem.
What does the offset parameter do in the signal source ??
Does it produce the equivalent of a DC off set?
For example if I want a ramp that goes from 0 to 2 volts, do I need an
offset of 1 (volt) ??
Thanks .
Bill
Hi All
I have a variable chooser which is configured as a Button.
It is used to start and stop the sweep. (It works) The choices are set to
1,0 with the default as 1.
When the flow graph runs the number 0 or 1 is printed on the button, when I
press it. I'm trying to make the button say ON'
Thanks Josh;
One of the boxes was disabled, as you said.
Thanks Marcus;
I changed the sample rate as you suggested.
So. I now have three problems remaining:
1)I need a way to start and stop the scan. I added a
variable_chooser (Button) and a valve; but I don't know how
Ok. So I followed Josh's advice and fed the output of a triangle source into
a variable sink.
My problem is getting the variable sink to control the usrp source.
The variable sink can be of type: Complex, Float, Int, short, or byte.
The usrp source is looking for a variable type Real and
Two Questions:
1) GRC comes with a slider but no command button (like the one with
usrp_probe). Is there an easy way to add one to GRC ?
Do I have to add one afterward using a python editor ??
2) Is there any way to implement a timer event with GRC ? I want
to step the
My program: usrp_wbfm_receive.grc was working fine. Now there seems to be a
problem with Ubuntu L
When I now run usrp_wbfm_receive.grc, I get the following error:
Audio_alsa_sink[hw0:0]: Device or resource busy
How do I find out what software is using the resource ??
Bill
Hi All;
Well I picked up my new system at Best Buy. (details later) I installed
Ubuntu 9.10 and Gnuradio from the git.
I must have made a typo somewhere because I get the following error when I
probe the USRP1:
Hi;
I basically followed the wiki as before .
I must have got an extra space in there or something L
Now I can post my step-by-step document on how to install Gnuradio / Ubuntu
for RF engineers and Windows Xp users J
I'm both so I can say that !!
I hope it will be of some help, and
As promised. Here's the system I went with: Sony VAIO model VCPF111FDB
from Best Buy.
500GB hard drive
1.6GHz CPU (not sure about boost to 2.68GHz mode?)
Intel Quad core i7 720QM
RAM 4GB (Not upgradable*)
3 USB ports (1 eSATA/USB port)
You can read the rest for your self J
Is there some bench mark I can run to test the USB and CPU loading ?
Apparently there is a problem with usrp_benchmark_sub.py .
I ran the wideband FM receiver flow graph in GRC and took some screen shots.
Any suggestions ??
Bill
___
Hi All.
If this message makes it thru then I apologize for the spam, but I have been
having trouble posting on the list.
Here Goes .
Bill
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Hi All;
My Gnuradio development system just had a major brain fart, so I'm looking
for recommendations on a replacement system.
I know there are a number of flavors of quad core system out there but some
appear to be better than others for this application.
From what I have observed,
From what I have found so far, it seems that the i7 920 is only available in
desktop systems. The leading edge in laptops seems to be the i7-720
processor.
I could always develop on a desktop and then port the software to a laptop
later, when prices come down J
It's good to hear that Gnu
Hi All;
Found this little baby on Tiger Direct:
http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=57
05306
http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=5
705306CatId=4938 CatId=4938
Hp Pavilion
Intel i7-720QM processor, 6GB of DDR3 RAM
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