Re: Re[2]: [multipsk] Confirmation of Multipsk Setup for VDL2 ACARS Decoding


Jan 18 10:37 PM

 


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#19897 Jan 18 10:37 PM

Hi Rick, You do NOT need the Commander software to run MultiPSK for VDL2 use. You do however need to set the frequency in MultiPSK by using the Transceiver button on the main screen. This screen is a bit confusing to use, however as I use it here, I click on the following:-Top row - RTL/SDRUnder that, click on Auto for gain and enter your correction amount for your dongle in PPM - mine is 51Then in the box showing 'Manual frequency' type 136965 for the kHz and click on Forward.This then sets the freq in the other screen headed 'I/Q direct interface via the sound card for SDR transceivers'Once this is set up, you will see VDL2 activity as horizontal red marks on a yellow waterfall.Tune this by clicking on the centre of the red line - this will change the AF frequency a little.After which you should see traffic appearing on the main MultiPSK screen. Read the MultiPSK help for further tests you can do. Regards, Mike SimpsonPenrith, NSW, Australiawww.rstools.info



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#19899 Jan 19 8:23 AM

Hi Mike,

Thank you for your response.  You saved me from going on "Wild Goose" chases pursuing the Commander and Virtual Cable software.  I can't find where the SDR calibration is set or where the gain is specified.  I was able to decode a number of aircraft messages by tuning the receiver waterfall to the center of VDL transmissions around 136.975 Mhz .  The parameters I utilized were default with the following exceptions:1. RTL/SDR on configuration screen2. AGC on Transceiver screen

I will continue searching for calibration and gain controls in Multipsk and learning about Multipsk  I'm afraid to fine tune the frequency I stumbled upon for successful decodes until I understand what is going on!

Thank You!!!

Rick


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