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 >> > >> > > > _______________________________________________ HackRF-dev mailing list [email protected] https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
