[amsat-bb] FO-29 QRM

Dave Mann cwo4mann at comcast.net
Sun Jul 24 18:04:05 UTC 2016


I imported the mp3 file, used filters to zero out anything below 1000hz and above 5000hz, then reduced db gain of 3000 hz center.  Copied the results, then re-ran the processed audio with 20db gain. Headphones.  I might try running original through my SDR and tinker with outputs.

73
Dave
N4CVX
 


Sent from my iPad

> On Jul 24, 2016, at 12:45, Bryan KL7CN <bryan at kl7cn.net> wrote:
> 
> Have been investigating SOX and am very curious about your exact settings and chosen plugins.
> 
> Can you elaborate on exactly how you cleaned up the signal?
> 
> Thank you!
> 
> -- bag
> 
> Bryan KL7CN/W6
> bryan at kl7cn.net
> CM98, usually
> 
> On Jul 24, 2016, at 10:17, Dave Mann <cwo4mann at comcast.net> wrote:
> 
> Here's my analysis:
> 
> -------------------- Audio File Translation ------------------
> 
> ---- English Language Transmission ----
> 
> " ... that's a good boy ... good by calley on it ... it would ... there's too much whining and vox control and {expletive deleted} have to get under it and thats whine ... ah we get by with it .. we can get the weather on it this week ... you know it's copying and {expletive deleted} weekend ... oh lash ..."
> 
> ---- Spanish Language Transmission ----
> 
> " ... y saludos copia cento percento mi faulta commentario KM4MD escuchaio cento percento y otro mentes el lunico KM4MD over, y yo lo creo que tal ... "
> 
> Spanish to English Translation - Literal-Colloquial:
> 
> " ... And Hello to you, 100% copy but my fault, [missed your comments] comments? KM4MD, over, and yes, that's the truth!  What's going on [today]?? ... "
> 
> 
> --------------------- End of Analysis ----------------------
> 
> 
> Hope this helps, BTW I am an old SIGINTer, both Voice, non-Morse, and Morse Interception.  FWIW, this was pretty rough copy for FM.  I used an audio processing system on my Linux workstation called "Sox" with various plug-ins.  Not like the olden days with an R-390 or the CEI-2000 listening to Soviet Cosmonauts.
> 
> 73,
> 
> Dave N4CVX
> 
> 
> 
>> On 07/24/2016 11:31 AM, Andrew Glasbrenner wrote:
>> https://www.dropbox.com/s/64571tcoj0y3o2e/FO-29%20QRM%2024JUL16%20ending%201
>> 6-08-15.mp3?dl=0
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