![]() ![]() While SDR is playing, click the Configure Source button and adjust Frequency correction (ppm) value until ACARS signals fit on the correct channel frequency. If you get signals on frequencies very near to the channel assignments, this means your dongle needs frequency correction. You will not receive signals on all of the above frequencies. Start SDRSharp and look on one of the ACARS frequencies for your region. You should be able to receive ACARS even with an ordinary FM band whip antenna. Mac finder for windows 7įor Europe and USA you need to RTL dongles to cover all frequencies, while for the other regions one is enough since all frequencies are within the 2.4 MHz bandwidth of RTL SDR. Since most of them use cheap crystals that do not work on exactly 28.8 MHz, some frequency correction is needed.įirst of all, lets see on what frequencies you should look for ACARS transmissions: Worldwide. Here, we can use SDRSharp to view ACARS signals and calibrate the RTL dongle. Visual SDR tools are always good for finding signals and monitoring RF spectrum. The only requirement is that those frequencies should fit in the bandwidth of RTL-SDR (about 2.4 MHz). More important than that, the software tools you will see here can listen to multiple frequencies at once. More than that, by selecting one frequency, demodulating it and sending the audio stream to ACARS decoder software you are limited to that single frequency.īut there are a few tools that work directly with RTL-SDR hardware, are free, cross-platform and perform ACARS demodulation. There are many tutorials on this subject and most of them involve piping an audio stream from a SDR application to an ACARS decoder application. Since RTL2832U based USB sticks are the cheapest SDR hardware this is what I will use for reception. The wide availability of cheap software defined radios makes it easy for anyone to receive and decode ACARS transmissions. ![]() Planeplotter Gen Code ACARS Transmissions Planeplotter Gen Code ACARS Transmissions. ![]()
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