Hi Bill,
Look at https://wiki.gnuradio.org/index.php/PLL_Carrier_Tracking. I
think I will add this formula to the Notes: radians per sample = 2 * pi
* freq / sample rate
I don't know how wide a spectrum the PLL can handle.
I am working on the documentation of blocks, so let me know if there is
anything I need to add or clarify.
Cheers!
---
Barry Duggan KV4FV
P.S. I like the quote by Steve Sims :)
On 2019-10-28 10:44, Bill Dailey wrote:
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 <[email protected]> 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 <[email protected]> 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
