Oops... I meant to send this to the list.
Begin forwarded message:
> From: "Mark J. Blair"
> Date: March 3, 2011 6:38:46 PM PST
> To: ranjini ram
> Subject: Re: [Discuss-gnuradio] choice of antenna and daughter board
>
>
> On Mar 3, 2011, at 6:15 PM, ranjini
rested in receiving?
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GnuPG public key available from my web page.
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On Feb 8, 2011, at 5:07 AM, Nick Othieno wrote:
> Do I sense a Marie Curie in the making?
Remember, kids: It's not the volts that kill you. It's the amps.
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Mark J. Blair, NF6X
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ware, I can see plenty of room in
the SDR user base for hardware with different feature sets and price points.
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Mark J. Blair, NF6X
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D
o tell people what they can and
can't do with it. If I wanted to control its end use to that degree, then I
wouldn't have released it in the first place.
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Mark J. Blair, NF6X
Web page: http://www.nf6x.net/
GnuPG public key available from my web page.
_
orts of delightful hijinks with the mouse pointer.
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Mark J. Blair, NF6X
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GnuPG public key available from my web page.
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e (though rare) on the surplus market, but I'm unaware of any
of the original receiving equipment that has made it out to the hands of
collectors. A SDR setup seems like a natural way to handle receiving the code
burst and then either playing it back at low speed for manual decoding, or
automati
a multimeter won't properly measure RF voltage. You're probably just
seeing 60 Hz power line noise, unless you're very close to a high-powered
transmitter. If there's a 100kW broadcast transmitter next door, then all bets
are off. :)
(*) or any other value you can get your
On Oct 17, 2010, at 11:27 PM, Ed Criscuolo wrote:
> Is it possible to use a WBX daughtercard on a USRP1 with the
> 3.3 stable release of GnuRadio
Yes. I am presently using my WBX in my USRP with the 3.3 release of GNU Radio
via macports on my Mac.
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Mark J. Blair, NF6X
Web page
ntenna
connectors on the WBX board are MMCX connectors.
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Mark J. Blair, NF6X
Web page: http://www.nf6x.net/
GnuPG public key available from my web page.
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ried several USRPS and several WBX boards and seen the same
> problem on all of them.
> We don't see it on the USRP2.
Interesting.
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On Sep 25, 2010, at 10:41 AM, dburg...@kestrelsp.com wrote:
> We would have used 13 MHz, but the USRP-1 FPGA code fails to transmit for
> clock rates below about 48 MHz.
Does anybody know why this is?
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sages to clear out from my discuss-gnuradio inbox
now... :)
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Mark J. Blair, NF6X
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GnuPG public key available from my web page.
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I'm new here, but I can already tell that GNU Radio is Really Cool Stuff. Thank
you for your great contributions, and I welcome our new overlord!
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Mark J. Blair, NF6X
Web page: http://www.nf6x.net/
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l, but would be a lot of work.
> -William
>
> On Mon, Aug 30, 2010 at 11:44 AM, Mark J. Blair wrote:
>
> On Aug 30, 2010, at 8:24 AM, William Cox wrote:
> > Right now I'm thinking the easiest thing would be to keep everything the
> > same, except remove the
oftware is complaining that it couldn't identify the installed
daughterboard(s), so their EEPROM(s) may need to be reprogrammed.
There's some discussion of the EEPROMs here that might be helpful:
http://gnuradio.org/redmine/wiki/gnuradio/UsrpFAQDBoards
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Mark J. Blair, NF6X
We
That seems like a lot of effort and expense to make something just a little bit
smaller. Now, if you could make the equivalent of a USRP + WBX board about the
size of a pack of playing cards, and powered from the USB port, that would be
quite interesting!
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Mark J. Blair, NF6X
Web page: ht
ngle, smaller board dedicated to a specific RF band?
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Mark J. Blair, NF6X
Web page: http://www.nf6x.net/
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l isn't, but I think it's
an unrelated error. When I run usrp_am_mw_rcv.py it complains:
RuntimeError: gr_remez: insufficient extremals -- cannot continue
> But, I'm glad you've gotten this far. - MLD
Thanks! I didn't expect
er: found unconfigured usrp; needs firmware.
~/gnuradio% usrper -v get_hash0
hash: ???7???g8!?_Md
~/gnuradio% usrper -v set_hash0 deadbeef
~/gnuradio% usrper -v get_hash0
hash: deadbeef
~/gnuradio%
While I don't know what any of those usrper commands are actually doing, at
least they
libusb-legacy a try tonight (I don't have my USRP with me at work
today). I'm sure I don't have a cable problem since I can transmit and receive
signals with my USRP. Thanks for the suggestions!
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Mark J. Blair, NF6X
Web page: http://www.nf6x.net/
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libusb version. Before I used that
flag everything would compile, but the usrp executables would fail to find a
symbol they needed in libusb and then crash.
--
Mark J. Blair, NF6X
Web page: http://www.nf6x.net/
GnuPG public key available from my web page.
sing dependency.
At this point, you're not so much having a gnuradio problem yet... you're still
learning how to understand the output of the "configure" script, which is
created by the Gnu Autoconf tools. It's kind of complicated, but once you get
over the learning curve
nt isn't building on your
system, nothing that comes after it in the configuration script matters until
you fix that, and the "--with-gruel" flag should tell it to give up immediately
after deciding not to build gruel.
By the way, you should only need to use sudo to run the fi
nstallation. I also do the same thing when I connect my outdoor discone
antenna to my USRP. Both of them have thick feedlines (similar to RG8, LMR400,
etc.) terminated with male N connectors, and that's a lot of mass and leverage
to hang off a little SMA connector.
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Mark J. Blair, NF6X
om cables in single quantity.
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Mark J. Blair, NF6X
Web page: http://www.nf6x.net/
GnuPG public key available from my web page.
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ommunications
applications.
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Mark J. Blair, NF6X
Web page: http://www.nf6x.net/
GnuPG public key available from my web page.
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sired for
better holdover stability, but I figured that VCTCXO should be adequate for my
needs.
Does that architecture sound reasonable? If so, would anybody like to save me
the trouble of designing and building it myself? ;)
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Mark J. Blair
rnal
reference isn't available, that would be even better. I've been thinking of
designing something along these lines, but I won't complain if you do the hard
work and I can just buy one from you. ;)
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Mark J. Blair, NF6X
Web page: http://www.nf6x.net/
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g
to connect to a socket. There are other examples which presently don't work for
me, such as hfx2.py and usrp_am_mw_rcv.py... I'll try debugging those some more
myself before I ask about them here.
Have any of y'all seen these kinds of failures before?
Thanks in advance
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