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Re: [Discuss-gnuradio] Basic analog USRP2 transmitter
Re: [Discuss-gnuradio] Basic analog USRP2 transmitter
Sun, 7 Nov 2010 21:38:41 -0500
This is the third time I have asked for help, each time I have tried to be civil, but I get responses back telling me to learn linux, not help with GNU-Radio/USRP2. Or if they are help with GNURadio/USRP2, it is with GRC, which doesn't work with whatever version of Fedora I happen to have.
My initial request for help was a couple of weeks ago and was this:
I just started using the USRP2 with GNURadio. I have made a script that
uses the gnuradio library, but it does not try and interface with the
How do you do this? Or alternatively is there a list of
gnuradio functions that I can look at that has how to set this up? I
have tried doing a google search for this, but it turns up nothing that I
have found to be helpful.
The response was for GRC, which doesn't work with whatever version of Fedora I have; however, by looking through the examples I tried to scrape together something, that didn't work.
My second request for help was this:
I have tried transmitting an analog signal from one USRP2 to another,
but when I run usrp2_fft.py on the rx computer, there is no receive
signal. The analog signal is supposed to be two tones at 350 and 440 HZ
transmitted at 2.6GHz. Can anyone help me figure out what I am doing
This included the python script that I had written; I did not get any responses.
My third request:
I have tried transmitting an analog signal from
one USRP2 to another, but when I run usrp2_fft.py on the rx computer,
there is no receive signal. The analog signal is supposed to be two
tones at 350 and 440 HZ transmitted at 2.6GHz. Can anyone help me
figure out what I am doing wrong?
tried using GRC, but at the most up to date version does not work with
Fedora, which is the OS that I have to use, this is for a research
project with a professor at my university, and the mandate is to use
Fedora, this does not look like it will change in the near future.
Again the response was to use GRC, which does not work with the version of Fedora that I have.
Fedora 11 is old and no longer updated. Upgrade your fedora.
As I mentioned in my initial request for help, I cannot change the version of Fedora that I have. It is mandated by a person who at the beginning of this semester made the decision to use this specific OS and it cannot be changed because of a large amount of software that would have to be reinstalled. This ordinarily would not be a problem, except for the fact that the software has to be installed in a specific manner depending on the specific version of the OS and the OS itself. I do not use that software, but that is the reason I was given. This again would not be a problem since I have a laptop that I can do whatever with, but that doesn't solve the problem for everyone else on the project, somewhere between 15 and 25 people. And I have Fedora 13, my inclusion of the statement about Fedora 11 was to illustrate a point about how confusing the instructions are.
If you make a mistake installing software, its not a big deal, just
google around, and if you need help, ask for help, polietly and
someone will help. Complaining is not gonna fix anything.
I did ask for help; however, I did not get it, I got people telling me to use GRC, which doesn't work with whatever version of Fedora I happen to have.
And what if I don't understand 75% of phrases in these 7 "simple" steps?
I use Linux, and almost every program i use is a single click install
from the software center and its free. Your comparing installing binaris
in windows to installing bleeding endge source code in linux. Not a
valid comparision.Interesting, the one time I actually need to use linux, it is not a "single click install." Someone gave a bash script that installed GNU-Radio, and that works as long as I restrict myself to using the sample scripts that come with GNU Radio, which again is not useful.
1) As with a lot of things that seems complicated at first, some
basic knowledge helps simplify things greatly. I'd suggest checking out a
basic linux book at your library. Perhpas some others on the list can
2) Linux isn't that scary, and most problems you encounter can be fixed up with a bit of googling.Or perhaps you could suggest some? I also tried googling for help with USRP2, but got back links for a program I can't use or links that don't help.
3) GNU Radio + USRP isn't an easy thing. It requires knowledge of
programming, DSP, digital communications, and maybe even some basic
electronics/circuits. If you already have that knowledge, why not take a
bit more time and get some linux knowledge under your belt. The two (at
this point) really go hand-in-hand.I have knowledge of DSP, programming (however, I had to start learning python), digital communications and circuits and electronics. I do not know linux. My objective is to learn how to use a USRP2 and I do not have the time to also learn linux.
Apples to oranges comparison. Linux distributions have "installers"
for 100s and 100s of
of different pre-configured, ready-to-go applications, just like
Windows does. Those installers
take care of any pre-requisites required, typically. There are
pre-packaged versions of Gnu Radio
available for Fedora, including GRC. Those pre-packaged versions are
with respect to the current development (actually, sometimes *really*
out-of-date). On Fedora,
Using the "System->Administration->Add/Remove Software"
function allows you to select
from hundreds and hundreds of categorized software and install it
over the net, generally
utterly seamlessly. Try going in there and typing a search term,
like "gnuradio" or
"plotting", or "scientific" or "engineering", or "radio", or
"algebra", or "simulation", or
"electronics". Some of what you find there likely also has versions
When I do System-Administration-Add/Remove Software and then search for grc I get grc-0.70-6.fc12, which I already have ( or at least am assuming by the checkmark next to the little open package box).
might be able to avoid a lot of these problems if you wrote a tutorial
on how to write a python script that does this instead of an infinite
number of tutorials on how to write a python script that transmits
350Hz and 440Hz tones over speakers and a grc diagram that transmits
the same tones over the air.
This sentence was supposed to mean that a tutorial on how to do simple transmission with USRP2 in python (and not in GRC due to issues installing it across different operating systems) would be helpful. I am sorry that the meaning was not clear.
I have gone back through the build guide for fedora that is located on the GNU radio website, and it does not help with upgrading GRC. GNU radio is working fine, but GRC is not.
Re: [Discuss-gnuradio] Basic analog USRP2 transmitter, Marcus D. Leech, 2010/11/07
Re: [Discuss-gnuradio] Basic analog USRP2 transmitter, Josh Blum, 2010/11/07
Re: [Discuss-gnuradio] Basic analog USRP2 transmitter, Eric Blossom, 2010/11/08
Message not availableMessage not availableRe: [Discuss-gnuradio] Basic analog USRP2 transmitter, Marcus D. Leech, 2010/11/08