This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/osmocom-sdr@lists.osmocom.org/.
Steve Markgraf steve at steve-m.deHi, On 01.08.2013 21:25, Lucas Ingles wrote: > Which is the actual receiver architecture used in the RTL-SDR dongles? I > mean, do we have a Hartley receiver, a Weaver receiver, a zero-IF > receiver, a low-IF receiver? Depends on the tuner, the RTL2832 can be used both in zero-IF and in low-IF mode. For the R820T it's low-IF, for all the other tuners (including E4K) zero-IF. > Also, the E4K tuner has two outputs: one output is the in-phase > component and the other output is the quadrature component. So, does the > RTL2832U has two ADCs to sample the two components? Or just one ADC and > it samples the two components interleaved? It has two ADCs, one for the in-phase and the one for the quadrature component. In the low-IF mode only one of them is used, which one can be selected. The generation of the I/Q signals then is done by an internal DDC. Regards, Steve