Difference between revisions of "Fldigi CW"

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(How to: oggdec, periods)
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== How to ==
 
== How to ==
* Download the .ogg file from the observation.  The downloaded file will have a filename that looks like this: satnogs_ObservationNumber_YYYY-MM-DD-SomeMoreStuff.ogg
+
* Download the .ogg file from the observation.  The downloaded file will have a filename that looks like this: satnogs_ObservationNumber_YYYY-MM-DD-SomeMoreStuff.ogg.
 
* Convert the captured .ogg audio file to .wav.  On a Linux command line, the conversion looks like this:
 
* Convert the captured .ogg audio file to .wav.  On a Linux command line, the conversion looks like this:
 
<pre>
 
<pre>
$sox satnogs_ObservationNumber_YYYY-MM-DD-SomeMoreStuff.ogg ObservationAudio.wav
+
$ sox satnogs_ObservationNumber_YYYY-MM-DD-SomeMoreStuff.ogg ObservationAudio.wav
 
</pre>
 
</pre>
* Launch Fldigi
+
Or with vorbis-tools installed on Debian:
 +
<pre>
 +
$ oggdec satnogs_ObservationNumber_YYYY-MM-DD-SomeMoreStuff.ogg
 +
</pre>
 +
* Launch Fldigi.
 
* Click on File, Audio, Playback.  Then select the .wav file.
 
* Click on File, Audio, Playback.  Then select the .wav file.
* Set Op Mode to CW
+
* Set Op Mode to CW.
 
* Adjust the center frequency to where the CW signal appears on the waterfall display.
 
* Adjust the center frequency to where the CW signal appears on the waterfall display.
 
* Configure modems, CW, General.  Set the BW and WPM to match the signal you want to decode. Save, close.
 
* Configure modems, CW, General.  Set the BW and WPM to match the signal you want to decode. Save, close.

Revision as of 21:55, 11 January 2020

In this example, Fldigi is being used to decode the CW beacon from the 33499 - KKS-1 satellite. The center frequency is set for 800Hz and the morse code rate set around 15 +/- 2 WPM.

FldigiCW156704.png

How to

  • Download the .ogg file from the observation. The downloaded file will have a filename that looks like this: satnogs_ObservationNumber_YYYY-MM-DD-SomeMoreStuff.ogg.
  • Convert the captured .ogg audio file to .wav. On a Linux command line, the conversion looks like this:
$ sox satnogs_ObservationNumber_YYYY-MM-DD-SomeMoreStuff.ogg ObservationAudio.wav

Or with vorbis-tools installed on Debian:

$ oggdec satnogs_ObservationNumber_YYYY-MM-DD-SomeMoreStuff.ogg
  • Launch Fldigi.
  • Click on File, Audio, Playback. Then select the .wav file.
  • Set Op Mode to CW.
  • Adjust the center frequency to where the CW signal appears on the waterfall display.
  • Configure modems, CW, General. Set the BW and WPM to match the signal you want to decode. Save, close.