Indeed, the only reason to run things under "sudo" is when you're doing something that needs root privilege, like updating system files
(such as when you do a sudo make install), or you're trying ot get access to some resource that an ordinary user doesn't have access to.
Ordinary applications
I'm talking about the UDP traffic between the host and the N2xx device.
on Jul 16, 2014, madengr rfe...@everestkc.net wrote:
Marcus,What OS are you using? I had the same issue (UDP not getting through onreceive side) with Fedora 20, even with Firewall "supposedly" turned off(i.e. Trusted Zone
Assuming that you're not just dropping samples -- are you getting 'O' on your receiver console?
If that isn't the case, then the most likely reason is that UDP doesn't guarantee a reliable channel, and if you're routing these UDP packets over a significant-sized IP network, that network may be
Also, you're sending data at 6.25Msps, with complex-float samples, which chews up:
6.25e6 x 8 bytes/second
= 400Mbit/second, without accounting for headers and other overhead.
You might want to re-think your architecture, if you're going to be sending this data over the network.
on Jul 11,
I suppose you'd have to modify the FPGA-to-ADC interface to bring in fewer bits from the ADC. I don't think there's a way to lower ADC resolution at the ADC itself.
on Jun 30, 2014, Leonardo S. Cardoso leo...@gmail.com wrote:
Hello everyone,
I excuse myself on advance by my noob question...
I find that it's relatively-common for people to criticize existing codebases because they don't use library foo, or aren't written in vogue-language-of-the-week, or don't use exciting-new-framework-of-the-year. The nice thing about computer-sciencey things is that there's *always* a multitude of
Make sure that you specify that the 2nd X310 uses external clock and 1PPS, and all of them should use time synch of
"unknown PPS".
Also, there has been a bug in the scope sink (dunno if fixed) where samples are *not* time-aligned in the scope sink. The except
is that a complex-pair will be
It will depend some on the effective group delay of both the interpolation filters in the the FPGA and the analog group delay of the analog bits of whatever daughtercard you're using.
The only way to be sure is to measure...
on Jun 04, 2014, bob wole via USRP-users usrp-us...@lists.ettus.com
if it has been tagged as tx_time=X.
--
Bob
On Wed, Jun 4, 2014 at 10:51 PM, Marcus Leech mle...@ripnet.com wrote:
It will depend some on the effective group delay of both the interpolation filters in the the FPGA and the analog group delay of the analog bits of whatever daughtercard you're
Ideally, end-users should never have to build from source--their distrib-of-choice should simply have the latest Gnu Radio release in
their repositories. The reality, however, is much different. The Gnu Radio project has *very little* influence over the policy and
decisions with respect to which
Actually, if you look at the error messages closely, Cmake is complaining about a Cmake function that doesn't exist. I think it's
CMake that is too old (or the Cmake files are using constructs that are too new), and when there's no portaudio at all, we don't
end up triggering that paragraph of
Something that I do is that for some of my "customers", I've created a ra-distrib.tar.gz that they unload onto their machine,
and then run an installer.sh that just uses the local source-code copies that were unloaded out of the TAR file.
This does a local source build, but from source that I
The only way to really make this work "properly" is to go closed-loop. At that point, you might as well use an external reference. I've pointed out before
that 10MHz OCXOs are available cheaply, and generally achieve 100PPB *at worst*, even the "scrap pulls" that are cheaply available on eBay
Gnu Radio is a streaming architecture. Sample-rate is actually almost-entirely meaningless within the flowgraph, and only really
has meaning "at the edges" when interfacing to the real world. The only exception is the throttle block, and even it doesn't
produce *precise* sample-rates.
For
I worked on a WWVB receiver a few years back. Then realized that I'm in an apparent "null" in the WWVB transmit pattern. Even
my commercial WWVB clocks cannot receive it. Sigh.
on May 15, 2014, Iain Young, G7III g7...@g7iii.net wrote:
Hi Everyone,In recent days I had the idea to plug my LF
Well, I was utterly unable to get it to work, using any recent GR paired with latest "master" of UHD.
I get the same error every time. The swig-generated code "looks" correct, but this error persists.
I have cleaned every vestige of Gnu Radio and UHD from my system, and done totally-clean builds
I don't know about that specific error, but any build that takes more than about 3 hours means that the even if successful, will yield an actual signal-processing
environment that has very poor performance except at very low sample rates.
What is your OS environment? Hardware? Memory? CPU?
hardware.Thanks,Austin- Original Message - From: Marcus Leech [mailto:mle...@ripnet.com] To: contrapez...@sportogs.com Cc: discuss-gnuradio@gnu.org Sent: Tue, 6 May 2014 15:13:45 + (UTC) Subject: Re: [Discuss-gnuradio] New guy having troubles
I don't know about that specific error, but any
It's a standard 10GBe card that should be supported by the ixgbe driver that has had kernel support for many many years.
on Apr 28, 2014, Lapointe, Benjamin - 1008 - MITLL via USRP-users usrp-us...@lists.ettus.com wrote:
Does the 10 Gigabit Ethernet PCI-express adapter card sold by Ettus work
An AM demodulator is a squaring function. It can only *ever* produce positive values. You can remove DC offset by using a high-pass filter after it.
on Apr 25, 2014, Anton Komarov anton.koma...@gmail.com wrote:
But when we have only positive values that means in fact we have 0.5 DC offset,
That would depend on the type of "i", but generally, if a single-precision "int", then 2^31.
But this is a generic programming and C/C++ question, not specifically related to Gnu Radio at all.
on Apr 25, 2014, MHMND Herath mh...@ou.ac.lk wrote:
Dear sir What is the maximum i value in for loop
Actually, I've always thought that it would be useful to be able to acquire a "handle" for a block, for use in "helper functions" within GRC, you can
actually achieve a fair amount with "helper code" that is hung off of buttons or function-probes and the like.
All of the GPIO stuff in gr-uhd is
Yeah, I'll do the same; enter a variable I haven't created yet. I'm afraid of putting pop-up boxes like this, though. You'll still see the red text in the block and the GRC error button will be enabled to help you track things down, so there will be an indication that you've done something
That doesn't quite do the "and dump" part, based on my understanding of an integrate-and-dump integrator.
There's an averager block that might be closer to an integrate-and-dump integrator, since such an integrator also is a decimator
(you only produce an output every N inputs).
I often use a
Grumble :(
This is currently blocking my attempts to update gr-ra_tools to 3.7 (and, by implication, simple_ra).
I may dive in myself and see if there's an easy fix that provides backwards compatibility with older systems, since many of my "customers" are on
older systems.
on Mar 31, 2014,
Thanks, I`ll give it a spin this evening.
on Mar 31, 2014, Johnathan Corgan johnat...@corganlabs.com wrote:
Marcus, your fixwas merged into maint/master/next.On Monday, March 31, 2014, Marcus Leech mle...@ripnet.com wrote:
This is currently blocking my attempts to update gr-ra_tools to 3.7
It was on my list to change the build-types to "debug" (to provide symbols). I can't remember whether I did that or not.
Other than disk space, there's no down-side that I can see
on Mar 26, 2014, West, Nathan n...@ostatemail.okstate.edu wrote:
On Tue, Mar 25, 2014 at 2:27 PM, Luke Berndt
The version of airprobe you're using hasn't been converted to use the new API in Gnu Radio 3.7, and the gnuradio-core package was deprecated in Gnu Radio 3.7.
on Jan 31, 2014, Maheshkumar Pandit elecomah...@gmail.com wrote:
hello everybudyy
i am try to install airprobe for gsm spectrum
Indeed, don't use a throttle block for anything other than a simulation not involving hardware.
What sample-rate are you using, and are you getting overrun or underrun indications ('O' or 'U' printed).
on Jan 13, 2014, Marqo Torres marqotor...@gmail.com wrote:
Hello, I am working on a real
There's no automatic mechanism for doing that.
on Dec 02, 2013, Raydel Abreu (CM2ESP) cm2...@gmail.com wrote:
Hello,Is it possible to go back and convert a Python GNU Radio code back into the GRC Flow Graph from which it was generated?
Cheers,
Raydel, CM2ESP
:
Oh, that's bad, I guess I should use instead the old code-reading method
Raydel
2013/12/2 Marcus Leech mle...@ripnet.com
There's no automatic mechanism for doing that.
on Dec 02, 2013, Raydel Abreu (CM2ESP) cm2...@gmail.com wrote:
Hello,Is it possible to go back and convert a Python
The Ubuntu packages are notoriously out-of-date, and since teh UHD version you pulled has a depend on Gnu Radio 3.6.1, it installed Gnu Radio 3.6.1.
YOu might want to just start over again with pybombs, or build-gnuradio
on Nov 22, 2013, nesimi eldarov nesaz...@mail.ru wrote:
Hi People,My
?Пятница, 22 ноября 2013, 18:00 UTC от Marcus Leech mle...@ripnet.com:
The Ubuntu packages are notoriously out-of-date, and since teh UHD version you pulled has a depend on Gnu Radio 3.6.1, it installed Gnu Radio 3.6.1.
YOu might want to just start over again with pybombs, or build-gnuradio
Just a note that the file-sink block takes a runtime-settable parameter for the file name. In GRC, make this a variable, and link it to a text entry field, and Bob's your uncle. This doesn't have the "file browser" aspects, but it achieves a big part of the goal.
on Nov 20, 2013, Nowlan, Sean
Why does the MAC block need to "reach around" way down into the depths of the PHY layer?
on Nov 14, 2013, M. Ranganathan mra...@gmail.com wrote:
Marcus,Looking around I don't see where the pointer to the block is made globally visible. I am inclined to add some code to the make method to
Try:
uhd_usrp_probe --args "addr=192.168.10.2"
Also, be certain that Network Manager isn't resetting the interface back to DHCP (automatic IP address selection). If Network Manager "owns"
the interface, *and* the interface isn't configured for static-IP according ot Network Manager, it'll keep
Gah!
I missed the second-half where nesazeri was using find_usrps.
Indeed, if you have software that uses the "classic" (pre-UHD) interface, that interface has been obsolete for several years and is no longer
supported. The N2XX in particular, *does not* support the "classic" interface.
on
Or set your PYTHONPATH in your .bashrc, and export it.
on Nov 08, 2013, Tom Rondeau t...@trondeau.com wrote:
On Thu, Nov 7, 2013 at 6:52 PM, Tom McDermott tom.mcdermo...@yahoo.com wrote: Hi Tom, thanks again for all your help. It runs from a terminal OK. The missing Qwt5 error comes when trying
What SDR is being used that samples at 400e6 SPS, and what *computer* is being used that can keep up? Inquiring minds want to know...
on Oct 31, 2013, Mike Jameson mike.jame...@ettus.com wrote:
Hi Maheshkumar,
For your example using a sample rate of 400e6, the low and high cutoff
Oh, nevermind. I missed the "simulation" part.
on Oct 31, 2013, Marcus Leech mle...@ripnet.com wrote:
What SDR is being used that samples at 400e6 SPS, and what *computer* is being used that can keep up? Inquiring minds want to know...
on Oct 31, 2013, Mike Jameson mike.jame...@ettus
The blocks in GRC have moved around quite a bit in the last year or so.
A simple signal source can now be found under "Waveform Generators", and if you move your mouse into the panel on the right, with all the blocks
categories, you can use CTRL-F, which will pop up a little text-entry box and
The default IP address of the N2XX devices is 192.168.10.2, so:
uhd_usrp_probe --args "addr=192.168.10.2"
Should work. EXCEPT, you only have a 10/100 Ethernet interface, which won't work. The N2XX devices support ONLY 1GiGe.
on Oct 21, 2013, Sandhya G sandhya4...@gmail.com wrote:
HI all,
I
Cool.
Any volunteers to convert gr-ra_blocks to 3.7 for me? [Crickets...]
on Oct 11, 2013, Juha Vierinen x...@mit.edu wrote:
Hi,
My gnuradio hackfest project was to migrate code to 3.7. With the help of a lot of the other more programming savvy participants, I managed to migrate everything
Most sources/sinks have something like a set_sample_rate() method that can be called.
It's often useful to put together a flow-graph in GRC to see how this is organized in Python.
For example, if you change sample-rate on the fly, your downstream blocks that care about sample-rate are going to
The filters all have "set_taps()" methods that allow you to set the taps dynamically.
on Oct 08, 2013, rmsrms1987 rmsrms1...@gmail.com wrote:
Hello Everyone, I have a quick question regarding the reconfiguration of blocks within agnuradio "top block" application. I am working on a radar system
I've described it like this:
Traditionally radios have been purpose-built for specific types of tasks using electronic components to perform those tasks. Many of the crucial "systems" in
a radio are actually performing mathematical "transformations" on the signals going through them. Sometimes
Just a quick summary of the "things people would like" to see in GRC:
o off-page connectors -- for managing large flow-graphs
o better-handling of GRC-produced hier-blocks
o allow blocks to be in more than one category
o make searching "easier"
o integrate Doxygen block documentation better
rible relative-phase-noise between the two channels. They dance all over the place on the scope display. In comparision, a B100 with TVRX2, under the same conditions, works flawlessly, with no appreciable relative phase jitter between the two channels. -- Marcus Leech
Marcus, (appreciate you
Hmmm, interesting.Was this with E4000 tuners, or R820T tuners?
What was your exact test setup, tuned-frequency, etc?
on Sep 25, 2013, Juha Vierinen x...@mit.edu wrote:
Hi guys,
Based on my very limited understanding on electronics, osclilators and other such things, I would expect oscillator
And I`ll comment that if you *do* undertake that work, successfully, I`d be happy to fold the results into the SVN code for multimode.
on Sep 12, 2013, Tom Rondeau t...@trondeau.com wrote:
On Wed, Sep 11, 2013 at 9:21 PM, John j...@tonebridge.com wrote: On 09/11/13 20:14, Marcus D. Leech wrote:
For a complex signal, the instantaneous power level is proportional to (I**2 + Q**2), which you then average.This is precisely what probe_avg_mag_sqrd does.
And, you shouldn't refer to it as an "energy level", since you're measuring power, not energy. Those are different (but related) concepts in
It uses a single-pole IIR filter. You can set the alpha value when you create the block, and also, there's a set_alpha() method that is a public method.
on Aug 29, 2013, dilip thapa palpa5b...@hotmail.com wrote:
Marcus,
Thanks for very nice explanation:
so I see the code of this block with the
Audio subsystem support out of a VM is kind of hit-and-miss.
Make sure that your emulated sound subsystem is actually running at the rate you request.
on Aug 28, 2013, Curt Karnstedt ckarnst...@gmail.com wrote:
I am using gnuradio companion to run a simple test, in which I just connect a
Is this a 32-bit install on 64-bit hardware issue?
on Aug 23, 2013, Tom Rondeau t...@trondeau.com wrote:
On Fri, Aug 23, 2013 at 1:53 AM, Damon qiu.guowang...@gmail.com wrote: On Tue, Aug 20, 2013 at 9:05 AM, Damon qiu.guowang...@gmail.com wrote: On Mon, Aug 19, 2013 at 8:29 AM, Damon
Also, what kind of network infrastructure? Is it dropping frames?
Which side of this has the BeagleBone, and which side is the "sink".
on Aug 09, 2013, Marcus Mller mar...@hostalia.de wrote:
Hi Vanush, remove the gui sink. It also limits the sample processing speed and thus is equally bad as
Cloning from there just worked for me.
on Aug 02, 2013, Alex Zhang cingular.a...@gmail.com wrote:
Hi Marcus,
I always met the git checkout error
"Could not find gnuradio/gnuradio-{core,runtime} after GIT checkout"
Thus everytime i have to change the git clone address to
How wide is your signal?
Then find the nearest sample rate your_bandwidth that satisfies the desired outcome that the computed
interpolation rate (64.0e6 / desired_rate) is an even number.
If the signal has artefacts that "spill" outside the required sample rate, then, yet, filter it first.
On some GUI slider widgets, there's a "call callback only on motion finished" option. I don't know whether that's available in WxGUI, and whether we use it (and whether the option to use it should be exposed within GRC).
Also, doesn't the callback get called on first instantiation to set the
daughterboard can only implement dul-band.
Best regards!
Dong Wang
2013/7/26 Marcus Leech mle...@ripnet.com
You can use two widely-separated antennae, or use a single antenna and a circulator--circulators are necessarily quite frequency-specific, and only offer about 20dB isolation from one port
My experience with wxPython on Windows is that it's both buggy, and horribly slow--and that's for apps that are not even vaguely related to Gnu Radio.
I've definitely seen window-redraw issues on wxPython on Windows.
on Jul 26, 2013, Clark Pope cepop...@hotmail.com wrote:
I have a strange
at 5:11 PM, Marcus Leech mle...@ripnet.com wrote:
If you don't explicitly specify a device address, UHD will search through the defaults, including for an N2XX at 192.168.10.2.
Just specify "type=usrp1" in the the device args.
on Jul 22, 2013, Nemanja Savic vlasi...@gmail.com wrote
If you don't explicitly specify a device address, UHD will search through the defaults, including for an N2XX at 192.168.10.2.
Just specify "type=usrp1" in the the device args.
on Jul 22, 2013, Nemanja Savic vlasi...@gmail.com wrote:
Hallo guys,
I have installed gnuradio on Beaglebone
It would be useful to see your exact flow-graph.
Also, how old is your USRP1?
What rev of UHD code are you running?
on Jul 22, 2013, mario behn mario.b...@gmail.com wrote:
Hi,
sorry for sending the email to both list, but it seems it might be a joint topic. Please advise ma if I'm wrong.
Indeed, if branch-prediction misses in the CPU caused actual visible effects to
data integrity, thousands and thousands of bits of software would be negatively
impacted, not just Gnu Radio and not
just multi-threaded applications.
All of the CPU-implementation tricks that are buried in the
Indeed, it sounds like a race condition to me. Could just as easily be due to
cache-miss changing timing as anything else.
on Jul 17, 2013, Johnathan Corgan johnat...@corganlabs.com wrote:
On 07/17/2013 10:12 AM, Marcus Leech wrote:
Indeed, if branch-prediction misses in the CPU caused
Hmm, is PYTHONPATH marked for *export* in your .bashrc?
on Jun 19, 2013, Favati smil...@libero.it wrote:
If you open up a terminal window and type: echo $PYTHONPATH What do you get?/usr/local/lib/python2.7/dist-packages Do you have Python2.7 installed? What is actually in directory
I'll point out that build-gnuradio uses sudo ldconfig judiciously, to deal with this issue...
on Jun 19, 2013, Josh Blum j...@joshknows.com wrote:
On 06/19/2013 08:57 AM, Marcus D. Leech wrote: On 06/19/2013 02:22 AM, Favati wrote: Il 15/06/2013 13:02, Tanaga Biru ha scritto: Dear Helper, I had
If you had used the build-gnuradio script, it will, as one of the last things it does, suggest what PYTHONPATH to use on your system. Ubuntu typically puts locally-installed Python packages in:
/usr/local/lib/python2.X/dist-packages
Also, keep in mind that the default terminal window
There was a back-and-forth about some wx-GUI initialization that fixed a similar problem for MacOS, but immediately also broke Linux.
There was a revert of that in the last day or two.
on Jun 18, 2013, Tom Rondeau t...@trondeau.com wrote:
On Tue, Jun 18, 2013 at 2:31 PM, George Nychis
I updated build-gnuradio this evening to bring in the support for hackrf for gr-osmosdr.
Tested on Fedora 14 and Ubuntu 12.04 only at this point, but seems to work (to the extent that it builds OK. I don't have hackrf hardware, so that's as far as I can go).
I'm working on a few blocks specific to small-scale radio astronomy, and one I want to build should be relatively simple.
It takes a vector as input--typically a vector of FFT magnitudes.
It produces multiple output streams, each stream is the sum of a subset of the bins in the FFT vector, with
Banned in 25 states. See him before it's too late...
:)
on Jun 12, 2013, Tom Rondeau t...@trondeau.com wrote:
Just wanted to share with anyone interested in Volk (or not sure aboutwhat Volk is and whether or not you are interested):WARNING: Contains
I believe that they are all dropped, but Josh can comment more definitively.
on Jun 10, 2013, Sean Nowlan sean.now...@gtri.gatech.edu wrote:
Do late packets always get dropped by the USRP? What happens if its buffers get filled up with samples, all of which are late?"Marcus D. Leech"
Assuming you're using a recent version of GRC, just start typing in the blocks window which enables a search. So typing "channel model" here will take you to the channel model.
on Jun 10, 2013, Pratik Kumar pratikkumar2...@gmail.com wrote:
I am new to gnuradio.
Can i get this channel as a block
I think there's a generic "transcendental" block that actually allows you to call anything in libm. It may be slow.
on Jun 10, 2013, vamshi krishna dodla vamshikrishna.do...@gmail.com wrote:
Hi all, does gnuradio have an exponential operator (like e^jw). If not how to implement it in gnuradio.
Indeed, the only way to do this is to use a signal generator with known power levels, and precision attenuators. You'll have to repeat the process over the full tuning range of the device(s) in question, sinceeffective gain will change a little with tuned frequency--that's just a natural property
How old is your build-gnuradio?
A fix went in for osmosdr sometime last week--Thursday night.
on Jun 03, 2013, Ben Z eigen...@binik.nl wrote:
Hi.
Decided to refresh my system, started clean with Ubuntu 12.04 LTS 64 bits on an I3 system.
Had to re-install Gnuradio and noticed that the
ps_input" which is one of the UHD examples. Also, LED 'E' tells you whether the clock is locked to the external reference.
-- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
___
Discuss-g
There was a problem briefly after the Gnu Radio repos were updated to 3.7 where a test in build-gnuradio for files being there after the GIT checkout of Gnu Radio.
But this was fixed in build-gnuradio a couple of days ago.
on May 31, 2013, Frankie Rawlins f.anth...@hotmail.co.uk wrote:
Hi,
I
Wolfgang:
You may find the skeleton code (derived from a GRC file) attached here to be useful. Note that for 4 DDCs, you'll need the 4rx FPGA image.
on May 26, 2013, Josh Blum j...@ettus.com wrote:
On 05/26/2013 01:10 PM, Wolfgang Buesser wrote: Hello I am using a usrp1 populated with 2 LFRX
I'm very happy to hear that, Matt. The SBRAC observatory architecture
is based on
USRP1!
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Matt Ettus
Sent: Friday, September 12, 2008 2:31 PM
To: Alberto Trentadue
Cc: Discuss-gnuradio@gnu.org
Subject:
[Adopts Austin Powers voice]
Yeah, Baby.
USRP2 has been a long time coming. As soon as I can rub together a few
nickles, I'll probably
pick one up.
We chose to go with the original USRP for the SBRAC project
(http://www.sbrac.org), partially
because I already had one, and partially for the
-gnuradio] USRP2 Price
Marcus Leech wrote:
[Adopts Austin Powers voice]
Yeah, Baby.
USRP2 has been a long time coming. As soon as I can rub together a
few nickles, I'll probably
pick one up.
We chose to go with the original USRP for the SBRAC project
(http://www.sbrac.org), partially
I'm just now running tests on the ICRON USB2.0 Ranger 2101 extender
device. I have it on a 100' piece of ordinary Cat5E UTP cable.
It seems to work OK with the USRP, but when I run at higher data rates
(decim=8), it gets a lot of uOuOuO--more than it gets
when I'm directly connected. Not
Indeed. I'm running my radio astronomy code on the latest build with
SMP support, and it's working really well. I can now run
two different daughtercards with my RA code, sucking in 8Msps each,
with 8-bit samples, and some fairly hairy processing.
This is awesome!
[Need to sneak the
: Wednesday, August 20, 2008 12:16 PM
To: Leech, Marcus (CAR:1A12)
Cc: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] Some noodling
On Tue, Aug 19, 2008 at 2:00 PM, Marcus Leech [EMAIL PROTECTED] wrote:
Controlling the switching function is no problem. But processing the
samples as they come
I want to write a dicke-switched type system for my existing
un-calibrated radiometry application (usrp_ra_receiver.py).
Controlling the switching function is no problem. But processing the
samples as they come in has me a bit stumped,
unless I write a custom-processing block.
So, the input
Other than gr_pwr_squelch_xx, there doesn't appear to be a simple gating
function in Gnu Radio--is that true?
I tried gr_mute_ff(), but it injects zeros, rather than gating the
stream, which is precisely what I don't want.
The gr_pwr_squelch_ff() function appears to chew up a *lot* of CPU,
How do I arrange for there to be multiple input channels from the USRP
when I have two Rx daughtercards?
I have a dual-polarization feed now, with dual DBS_RX cards, and I want
to compute the cross product between
the two channels.
In my existing code, there's:
self.u =
Does anybody have a comprehensive list of USB-interfaced SDR devices out
there that work roughly in the
same spirit as the USRP (even if there aren't plug-ins for Gnu Radio).
In my other life as
Principal Investigator for the Shirleys Bay Radio Astronomy
Consortium, I managed to get a free
I've been looking into USB 2.0 range extenders recently, in support of
my big-dish radio astronomy project. There's a company called
ICRON that has a Ranger 2101 product that allows you to extend USB 2.0
up to 100M with Cat5e cable, and it's about $300.00.
This is roughly half the cost of
to an absolute
minimum).
My overall system temperature with this setup was about 95K.
--
Marcus LeechMail: Dept 1A12, M/S: 04352P16
Security Standards AdvisorPhone: (ESN) 393-9145 +1 613 763 9145
Strategic Standards
Nortel Networks
I'm currently doing some preliminary planning/budgeting for a
significant project involving Gnu Radio:
http://tech.groups.yahoo.com/group/sbrac-astronomy/
My current thinking is to run dual polarization at the feedpoint, using
USRP2. The idea is that two USRP2s
can live in a
Eric Blossom wrote:
We said this back in December, but we really mean it now...
Those of you who are using the trunk and haven't converted to the new
top_block/hier_block2 way of doing things should either do so now, or
switch to the 3.1 stable branch.
Eric
I *think* my RA applications
The gr-radio-astronomy list is now active on Yahoo:
http://tech.groups.yahoo.com/group/gr-radio-astronomy/
I sent invites out to a bunch of people, but only a couple of them have
responded. Sometimes the invite
messages from Yahoo get caught in peoples SPAM filters.
If you thought you should
was better spent on other things...
--
Marcus LeechMail: Dept 1A12, M/S: 04352P16
Security Standards AdvisorPhone: (ESN) 393-9145 +1 613 763 9145
Strategic Standards
Nortel Networks [EMAIL PROTECTED
with gr-radio-astronomy. I'm thinking that perhaps
a separate mailing list might be appropriate
for support-type activities relating to gr-radio-astronomy.
--
Marcus LeechMail: Dept 1A12, M/S: 04352P16
Security Standards AdvisorPhone: (ESN) 393-9145 +1 613
John Gilmore wrote:
My first thought is to just increase the sample rate and effective
bits per sample of the audio processing hardware, and increase the
number of channels so that ordinary stereo audio can happen
simultaneously with analog I/O. I think it's a crime that cheap
analog I/O
Lars E. Pettersson wrote:
On 12/20/2007 12:04 PM, Lars E. Pettersson wrote:
On 12/19/2007 09:49 PM, Marcus Leech wrote:
I'm running Fedora Core 7, with all the updates. I built and tested
from the Gnu Radio developer tree a couple of weeks ago,
and everything was fine.
Ah
Marcus Leech wrote:
H. That's strange. I'm going to pull the latest SVN
developer tree, and re-build from scratch on my F7 updated
system (it's an X86_64, but I also use an x86 system).
OK, so the developer tree as of a few weeks ago was working fine, but
indeed when I
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