On 02/22/2017 03:29 PM, Steve Joseph wrote: > Hi, > > I'm trying to understand the HW impairments python block better. I > looked at the py source, and came up with the attached drawing of the > functionality. > > Can you help me understand what the frequency offset is trying to > emulate? My guess is that one would set this offset = IF freq in a > superheterodyne, or carrier freq in a direct conversion. Is that > correct? My initial thought was that it was actually going to shift the > signal by 'freq offset' Hz or rad/sample. This doesn't appear to be the > case though.
Yeah, that's what it does. See here: https://github.com/gnuradio/gnuradio/blob/588fe5e999f57d6b9e9a4f3c1371f4eee36494a3/gr-channels/python/channels/impairments.py#L53 Not sure about your other one without reading some code though... and it's too late for my poor brain now. -- M > Also, can you help me understand how phase noise magnitude is set? If I > add phase noise to an amplitude 1 tone, and I want -60dBc/Hz @ 10kHz, > how do I determine phase noise magnitude? > > Any help is appreciated! > > Thanks, > Steve > > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
