On Aug 31, 2014, at 15:12, McDonald, J Douglas <jdmcd...@illinois.edu> wrote:
> In particular in "wraparound" of the FFTs is abysmal. It renders it > virtually useless for SW reception. It seems to work equally > well or badly with or without one of those 125 > M Hz upconvertors; however I am feeding it from a fairly good > antenna and a very good source follower 50 Ohm out preamp > at the antenna end of about 50 feet of coax. > > Using the cheapie dongles, though they have only 2.8 MHz bandwidth, > the foldover is pretty well down 800 kHz from the foldover pint. > On the HackRF, its still visible 10 MHz on the wrong side! Unlike the RTL-SDR devices, HackRF One has a selectable filter bandwidth -- at least, as exposed by gr-osmosdr (I haven't seen SDR#'s configuration options). The misbehavior you describe would occur if the filter was too wide for your choice of sample rate. -- Kevin Reid <http://switchb.org/kpreid/> _______________________________________________ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com http://nine.pairlist.net/mailman/listinfo/hackrf-dev
