Can you give a little primer on using that PLL tracking? I would
love to use that to just track carriers random frequencies. For
instance 10mhz. Ultimately I want to track and periodically log and
offset from true predicted frequency. Like every 10 seconds.
Bill Dailey
Negativity always wins the short game. But positivity wins the long
game. - Gary Vaynerchuk
Don’t be easy to understand,
Be impossible to misunderstand
- Steve Sims
> On Oct 28, 2019, at 9:27 AM, Barry Duggan <address@hidden>
> wrote:
>
> Hi Albin and Volker,
>
> I added a PLL Carrier Tracking block to take care of the tuning
> problem. See the revised
> https://wiki.gnuradio.org/index.php/File:FunCube_AM.png
>
> Albin, that 'spike' is the carrier! This is AM ;)
>
> Thank you both for your suggestions.
> ---
> Barry Duggan KV4FV
>
>
> On 2019-10-27 07:13, Albin Stigö wrote:
> > Hi Barry,
> > Some thoughts:
> > You have a large DC spike at the center, try using the frequency
> > xlating
> > fir filter to tune an offset frequency.
> > Why don't you decimate at the channel filter?
> > Try observing the signal at various points using the frequency
> > sink.
> > Good luck,
> > Albin SM6WJM
> > On Sat, Oct 26, 2019, 21:02 Barry Duggan <address@hidden>
> > wrote:
> > > Hi,
> > > I've been working on a gnuradio AM broadcast receiver, and have
> > > found
> > > that the tuning is very critical to obtaining clear audio. My
> > > flowgraph
> > > can be seen at
> > > https://wiki.gnuradio.org/index.php/File:FunCube_AM.png.
> > > Are there any alternate demodulation methods which are not so
> > > sensitive
> > > to exact tuning?
> > > Thanks,
> > > --
> > > Barry Duggan KV4FV