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Re: [Discuss-gnuradio] Successful Demonstration of GnuRadio!
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] Successful Demonstration of GnuRadio! |
Date: |
Tue, 22 Apr 2003 12:43:10 -0700 |
User-agent: |
Mutt/1.4i |
On Tue, Apr 22, 2003 at 08:42:36AM -0400, address@hidden wrote:
>
> Hi Everybody!
>
> I have just completed a presentation last Thursday on GnuRadio
> with my local ham radio club called OVMRC or Ottawa Valley Mobile
> Radio Club. Using the equipment that I have available at the time,
> I was able to show the decoding of a narrow band fm signal and what
> the modulation signal looks like with the audio scope.
Great job!
> I took my Yaesu FT-847 and found the 455Khz IF, tapped off of
> it. Mixed it with a 465Khz LO to get a modulation signal into my
> sound card at 10Khz. After rewriting some of the codecon/nbfmx.cc
> file to accept source from the sound card I was able to decod the FM
> from a nearby hand talky.
> Also I have been able to acquire a NI-6035e data acquisition card.
> We have rewritten some of the comedi drivers to work with
> GnuRadio. Unfortunately we did not have the drivers in time for the
> demonstration. We are having some data alignment issues with it. So
> we are asking a small assistance with this, Eric are you able to
> help? :)
Sure. It's been a while since I looked a comedi (more like 18
months). Last time I looked, it wasn't obvious to me how to set it up
for continuous streaming. For our radio apps, if we can't get the A/D
and D/A's to stream, I think it's a non-starter.
Does the existing NI-6035e comedi driver work?
Is there a way to make it stream continuously?
If so, there shouldn't be a problem gluing it into GNU Radio.
We probably ought to have generic comedi sources and sinks, but for
now, let's get your device working.
Let me know how I can help.
> Thanks for the software and the inspiration!
> Mike Kennedy
> Va3TeC
Eric