[Discuss-gnuradio] mirrored spectrum around tuning freq

[Luca Pascale]

Hi all,

why when I use:

uhd::tune_request_t tr(tuningFreq);

USRP_DEVICE->set_rx_freq(tr);

I get a spectrum that is "mirrored" around the tuninFreq ?

See: http://picpaste.com/sp-zJquS0qK.png

with tuningFreq = 149.8 MHz, input signal at F = 150 MHz (from signal generator)

If I use a LO offset different from zero the mirror effect disappear.

Why ?

Thanks,

Luca