[amsat-bb] TR: IDEFIX TLM

[Jean-Louis.RAULT@xxxxxxxxxxxxxxxxxx]

Correction:

Please replace:
 "To play the audio pcm files  with your favorite audio 
software, pleasure configure it as follows: 16 bits, sample 
rate: 8000 bits/s, mono."

by:

To play the audio pcm files  with your favorite audio 
software, pleasure configure it as follows: 8 bits, sample 
rate: 8000 bits/s, mono."

Cheers

Jean-Louis F6AGR

> Hi all
> 
> Now that the internal temperature has decreased, the IDEFIX 
> TLM data are coherent again. 
> Please note that the CU1 payload temperature is also 
> transmitted in an analog manner.
> One of the "voice" messages on 145,838 MHz is an audio 
> carrier centered around 1800 Hz. The audio freq is 
> temperature dependant.
> To allow us to compare the analog and digital temp data, 
> please record the 1800 Hz freq.
> Please  send us either your own frequency measurement, or the 
> corresponding audio file.
> An easy way to measure the audio freq is to use an FFT 
> software such as Spectrogram or Cool Edit. To get a good 
> accuracy, select  a size of at least 8000 FFT points.
> WPSKDEC is able to record audio files when it is decoding TLM 
> data in real time.
> To record audio files, go to Config page, and choose Wave 
> file in the bottow left of the window.
> pcm file are automatically named and stored in the same 
> directory as WPSKDEC, along with the txt and raw decoded files.
> To play the audio pcm files  with your favorite audio 
> software, pleasure configure it as follows: 16 bits, sample 
> rate: 8000 bits/s, mono. 
> 
> Thanks in advance for your reports
> 
> 73 de Jean-Louis F6AGR
> 
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