The PLL Freq Det is the one I would like to figure out. 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 11:01 AM, Barry Duggan <[email protected]> wrote: > > Hi Markus, > > From what I can tell, the PLL Carrier Tracking block does the correction, but > it doesn't tell you what it did, so I'm not sure you can log the offsets. > There are other PLL blocks I haven't looked at yet, so I don't know about > them. See https://wiki.gnuradio.org/index.php/Category:Block_Docs for a list > of all the blocks. Not all of them have been updated yet! That's what I am > working on. Especially the example flowgraphs. > > 73 > --- > Barry Duggan KV4FV > > >> On 2019-10-28 11:41, Markus Heller wrote: >> Dear OMs, >> I guess this carrier tracking block would be useful to handle frequency >> drift of cheap (unstabilized) devices, when working QO-100 satellite >> connections. This block could be used to find the band end beacons and >> derive the frequency shift and correct it accordingly. Right? >> vy73 >> markus >> dl8rds >> Am Montag, den 28.10.2019, 09:44 -0500 schrieb Bill Dailey: >>> 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
