Re: rtl_fm: degraded demodulation caused by self-introduced DC !?

Hi Nikolay,

i don't see any option to do IQ calibration in rtl_fm !?

As i wrote to Murat, the DC is NOT the LO ! The spectrum already looks clean. I don't have a problem with the symmetry. The "dc" option does work too late: after demodulation.

kind regards, Hayati

Am 18.07.2015 um 12:03 schrieb Nikolay Dimitrov:

You need IQ calibration.

When calibrated, spectrum should look much cleaner, signals should appear only on 1 place of the waterfall/spectrum display, and the LO carrier (the so-called DC) will be much better suppressed, although not completely removed (that's why the -dc option exists for the baseband processing).

Regards, Nikolay