Hi Barry, I have similar problem receiving and demodulating an rtty signal. At the moment I do it in two steps:
First: set the fcdpp to the desired band, apply a lp with downsampling to 48 Khz ( for rtty i even downsample to 8Khz) and add a spectrumdisplay and this stage. Here you get a get reading of the frequency and you can downmix it to baseband. -- Volker Am 26.10.19 um 21:00 schrieb Barry Duggan:
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,
