1- Here's the arguments: osmocom_siggen -a hackrf -f 100e6 --sine 2- I haven't, but I will
3- Yes. (Default freq, Max freq and Min freq) Maybe that's because the deviations in FM frequency is very small (50KHZ each side), so I can't see them on oscilloscope and I should use a spectrum analyzer Thanks Mehdi On Mon, Nov 23, 2015 at 8:18 PM, Dominic Spill <[email protected]> wrote: > On 22 November 2015 at 21:28, MA <[email protected]> wrote: > > > > 1- When I use osmocom_siggen, I see nothing on oscilloscope (are there > any > > tweaks/tips I should know?) > > I've never used it, but could you share the command line arguments > that you used? > Do you see any change at all when you change the parameters? > > > 2- I used a very simple FM transmitter (on 14MHZ) and connected its > output > > to oscilloscope, but what I see is a pure sinusoidal wave, not an FM > > modulated one. A picture and the GRC file are attached. > > I see that this works for you, but have you tried something simpler? > Perhaps based on the one here: > http://wiki.opendigitalradio.org/Simple_FM_transmitter_using_gnuradio > > > I have tested this file with 80MHZ and could easily listen it on a FM > radio, > > so it works and produces something > > Is the only thing that you change between the 80MHz/14MHz runs the > frequency in the osmocom sink? > > > > On Sun, Nov 22, 2015 at 2:50 PM, Dominic Spill <[email protected]> > wrote: > >> > >> On 21 November 2015 at 19:57, MA <[email protected]> wrote: > >> > > >> > Can I connect HackRF's output directly to an oscilloscope? (in TX > mode, > >> > running osmocom_siggen) > >> > I was worried whether connecting it (without using an antenna or dummy > >> > load) > >> > would hurt HackRF's output. > >> > >> I would suggest using a dummy load to be cautious, but I really have > >> no experience of connecting HackRF One directly to other equipment. > >> > >> Mike Ossmann, Jared Boone or anyone else who has tried this can > >> probably give a better response as to why you would/wouldn't need to. > >> > >> Thanks, > >> Dominic > >> > >> > On Sun, Nov 15, 2015 at 9:20 PM, Dominic Spill <[email protected]> > >> > wrote: > >> >> > >> >> On 14 November 2015 at 09:56, MA <[email protected]> wrote: > >> >> > > >> >> > Can I use HackRF as a function generator? > >> >> > >> >> From a software point of view, it's very easy to accomplish. If you > >> >> want to use GNU Radio you can use the waveform generator block [1] > >> >> > >> >> > (The only thing I've found is "osmocomm_siggen" and a single page > in > >> >> > Michael's Recon2014 presentation, under "Baseband Expansion Board" > >> >> > title) > >> >> > >> >> From the hardware side, there is a header on HackRF (P9 on the right > >> >> hand side of this image) which allows access to the baseband, giving > >> >> you direct access to the output of the DACs (and input to the ADCs). > >> >> The "Baseband Expansion Board" would be plugged in to that header to > >> >> allow signals to be used without passing through the analogue > >> >> front-end. The expansion board would be used to mix the I and Q > >> >> signals (and possibly offer some other features). > >> >> > >> >> Dominic > >> >> > >> >> [1] > >> >> > >> >> > https://gnuradio.org/doc/doxygen/group__waveform__generators__blk.html#gac97c0f42ffb63f1265decceaaeab9177 > >> >> [2] https://i.imgur.com/og7TGVz.jpg > >> > > >> > > > > > >
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