On Tuesday 14 February 2006 00:13, Robert McGwier wrote:
> Thanks for your input. I am pretty ignorant about these FM standards
[snip]
> not have hiss that is irritating. But the COMPOSITE signal is what is
> FM modulated but I bet they do not preemphasize the composite signal.
> They might do pr
All:
I did deemphasis on Left and Right and checked it in just now. It is
much better now. Thanks for the links to the RDS stuff. I will take a
look.
THANKS it already sounds much better.
Bob
al davis wrote:
On Tuesday 14 February 2006 00:13, Robert McGwier wrote:
But the COMPOSIT
Hi Eric,I am trying to rewrite the flowgraph mechanism written in Python into C++ so that I can run the GNU Radio modules written in C++ as such in the Click software router. But, as I started to work on it, i found that converting the code written in Python into C++ is not such a trivial exercise
On Tuesday 14 February 2006 00:13, Robert McGwier wrote:
> But the COMPOSITE signal is what is
> FM modulated but I bet they do not preemphasize the composite
> signal. They might do preemphasis on the L+R baseband signal
> as Matt suggests but I just don't know about the others. I
> am trying to
Here is a link to the RBDS standard:
ftp://ftp.rds.org.uk/pub/acrobat/rbds1998.pdf
And another link to the digital AM radio standard:
http://www.ibiquity.com/technology/pdf/Waveforms_AM.pdf
On Tue, 14 Feb 2006, Robert McGwier wrote:
> Al, Matt:
>
> Thanks for your input. I am pretty ignora
Al, Matt:
Thanks for your input. I am pretty ignorant about these FM standards
and basically I googled my way to a reasonable spec, drew the flow
graph and coded it. The stereo demux was definitely not working with
DEemphasis applied to the composite signal. And it was clear why. The
tap
On Monday 13 February 2006 20:06, Matt Ettus wrote:
> I seem to remember that the preemphasis on stereo signals is
> not performed on the multiplexed signal. It is actually
> performed on the audio components separately, before mixing
> with the stereo subcarrier. Therefore deemphasis needs to be
It just under/overflows. Basically hangs without updating the fft.
Original Message Follows
From: Eric Blossom <[EMAIL PROTECTED]>
To: Clark Pope <[EMAIL PROTECTED]>
CC: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] byte-wide ADC transfers
Date: Mon, 13 Feb 2006 14:22:39 -0800
On Mon, Feb 13, 2006 at 08:28:07PM -0500, Clark Pope wrote:
> It just under/overflows. Basically hangs without updating the fft.
My guess is that you don't have a matching usrp and gr-usrp build.
Since you don't see "set_format", that would indicate that you don't
have the current usrp build which
n4hy wrote:
> The stereo separation is pretty awesome. However on stations that are
> full quieting with monoaural transmissions, the stereo demultiplexer is
> introducing hiss.On really strong stations, it is hard to hear.
> The deemphasis has been removed from the processing chain while I
On Sun, Feb 12, 2006 at 10:36:24PM -0500, Clark Pope wrote:
> I was able to get it work if I comment out the call to make_format and hard
> coding the format:
>
>if options.width_8:
>width = 8
>shift = 8
>#format = self.u.make_format(width, shift)
>
On Sun, Feb 12, 2006 at 07:15:19PM -0500, Clark Pope wrote:
> I still have not gotten this to work. I looked in cvs for
> gr-usrp/src/usrp.py and there is nothing in there about setting the format?
> I do see it supported in the firmware.
FYI, set_format is implemented in usrp_standard.{h,cc} wh
On Sun, Feb 12, 2006 at 07:15:19PM -0500, Clark Pope wrote:
> I still have not gotten this to work. I looked in cvs for
> gr-usrp/src/usrp.py and there is nothing in there about setting the format?
> I do see it supported in the firmware.
Are you sure that your copy of usrp is up to date?
Please
On Sun, Feb 12, 2006 at 01:04:42PM -0500, John Ackermann N8UR wrote:
> For what it's worth, one suggestion I'd make for the examples is to use
> "plughw:0,0" as the default audio sink device, rather than "hw:0,0"
> (assuming you're using ALSA). It seems that some cheap soundcards (like
> the on-bo
On Sun, Feb 12, 2006 at 11:54:07AM -0500, Charles Swiger wrote:
> On Sat, 2006-02-11 at 09:40 -0500, Robert Roberts wrote:
> > I've been going through the GNU Radio examples the past week, and one
> > thing I've noticed is that many of them are clogged up with Powermate
> > code. The Powermate knob
The stereo separation is pretty awesome. However on stations that are
full quieting with monoaural transmissions, the stereo demultiplexer is
introducing hiss.On really strong stations, it is hard to hear.
The deemphasis has been removed from the processing chain while I try
and figure o
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