On Thu, May 2, 2019 at 1:22 PM Brad Hein wrote:
> I took a Raspberry Pi and attached a 48KHz USB sound card, with a big
> magnetic loop antenna fed into the mic. A little cheesy? yes! But I'd like
> to try and see if I can receive VLF. It's in a remote location with little
> to no interference
Dear community,
please see our programme web site.
The programme of the Software Defined Radio Academy 2019 on June 22 in
Friedrichshafen is ready:
http://2019.sdra.io/pages/programme.html
Please note that we are looking forward to a distinguished talk from
Nobel Price winner and radio
reading your email more closely:
* the sound card generates real data with an even spectrum with components at w
and -w
* you transfer from VLF band to baseband by multiplying by a complex NCO
exp(-jwt) with t=[0:length(samples)]/fs
when sampling at fs
* the -w component is shifted to -2w that
https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2017RS006420
or
http://jmfriedt.free.fr/agu_dcf77.pdf
We are currently working on simultaneously decoding (e)LORAN/MSF, TDF & DCF77
v.s GPS
with a sound card.
JM
--
JM Friedt, FEMTO-ST Time & Frequency/SENSeOR, 26 rue de l'Epitaphe,
25000
I took a Raspberry Pi and attached a 48KHz USB sound card, with a big
magnetic loop antenna fed into the mic. A little cheesy? yes! But I'd like
to try and see if I can receive VLF. It's in a remote location with little
to no interference so I'm thinking my chances should be good. The challenge
I want to second this! We've only been very stringent with versioning
starting in the last couple of years, but really, it should rarely
matter whether you use 3.7.13.4 or 3.7.2 for things that worked under
3.7.2 – so, please try with something less arcane!
Best regards,
Marcus
On Thu,
Hi Gary, since we acutely changed things in the Windows audio sink:
What's your version of GNU Radio?
Generally, Windows seems to be of the conviction that the audio device
you're trying to record from only has one, not two channels.
Best regards,
Marcus
On Thu, 2019-05-02 at 08:53 +0100,
Hi. Anyone who can help.
Try as I may I cannot get a second port working using the audio source
block.
When I set the number of outputs to 2 for stereo (as in the
documentation) I get the error below.
File "C:\Users\Gary\Documents\top_block.py", line 109, in
main()
File
Hi Marc,
The most recommended way of building GNU Radio on Windows is documented
here:
https://wiki.gnuradio.org/index.php/WindowsInstall#Building_on_Windows_with_Native_Tools
That approach is only valid for versions after 3.7.9.2 though. If you
need an earlier version I'm afraid that I don't
