As a quick followup to my previous post, I confirm that the R820T is well suited for GPS signal decoding. I was not expecting the huge frequency offset (> 100 kHz at 1.57 GHz) and was not searching far enough from the expected carrier frequency during the acquisition phase. However these results were acquired by runnig rtl_sdr -s ... -f ... while gnuradio-companion running gr-osmosdr is unable to lock at 1.57 GHz and barely locks (for a few seconds !) at 1.56 GHz. I have analyzed the various version of librtlsdr (used by rtl_sdr and by gr-oscmocom) as well as the set_frequency functions and am unable to track any difference between the two codes (so far).
JM -- JM Friedt, FEMTO-ST Time & Frequency/SENSeOR, 32 av. observatoire, 25044 Besancon, France _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
