[Hackrf-dev] HackRF as a function generator

[Dominic Spill]

On 21 November 2015 at 19:57, MA <mehdideveloper at gmail.com> 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 <dominicgs at gmail.com> wrote:
>>
>> On 14 November 2015 at 09:56, MA <mehdideveloper at gmail.com> 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
>
>