Inspectrum works for saving a portion of a signal (as does Baudline). I think the request here was for something automatic/runtime, though.
Hi all,
since Audacity is targeted at audio samples, it might be interesting to
have a tool that is more targeted at IQ samples.
I've heard/read about quite a few people who use "inspectrum":
https://github.com/miek/inspectrum
(I hope this is the correct repo.)
A somewhat older tool might be "baudline":
https://www.baudline.com/
(I used it in the past but I'd probably switch to inspectrum nowadays).
Cheers
Johannes
On 25.08.22 20:33, Mike Markowski wrote:
> James,
>
> I find an easy approach is to write the signal out as alternating i/q
> binary if it's not already. That can be read into audacity as stereo
> (File -> Import -> Raw), edited and written back out as raw data without
> header (File -> Export -> Export Multiple, and choose Raw Headerless).
> Don't worry about audacity's sample rate because you're editing raw i/q
> anyway. This allows editing down to the sample level.
>
> Good luck!
> Mike ab3ap
>
> On 8/25/22 1:52 PM, James Wanga wrote:
>> I'm receiving a phase modulated signal representing a periodic pulsed
>> byte that looks something like this:
>>
>> -------------|-|||--||-------------|||--||||-------------|--||||-|-------------
>>
>>
>> I'm trying to understand how I might split this signal roughly halfway
>> between each pulse of activity so I can save each pulse as a separate
>> IQ fil, bit like this:
>>
>> ------|-|||--||------
>>
>> -------|||--||||-------
>>
>> ------|--||||-|------
>>
>> The split does not have to be precise, it only needs to avoid
>> bisecting any of the pulses. Here are some things I've tried.-
>> Creating a custom block on the receiver that uses a timing interval.
>> Unfortunately, the pulses aren't perfectly periodic so eventually this
>> causes the split to drift.[...]
>