2021-09-02, 09:05 AM
(2020-08-01, 10:24 PM)dj11223344 Wrote: Thanks for all the suggestions. Still trying to figure it out. I got side tracked on other projects. I can't even seem to tune into known FM radio stations. Maybe I received a bad antenna or dongle.
I was in a similar position to you, having just purchased the RTL-SDR. Initially the ppm value would not converge. I then tried a much shorter dipole antenna (<100mm) as it appeared that it was possibly using GSM signals for the calibration (p.s. I'm trying to calibrate at home not on the boat) and found that it then converged rapidly to ~+-1ppm.
Having completed the calibration (0 ppm), I get background noise from the marine VHF channels on GQRX (too far from the sea!) but silence on (wideband) broadcast FM even though i have a good signal. Has anyone else experienced or fixed this?
Paul