ACARS Demod preview

[jaro61]

Something is wrong. It tells me that it cannot find the module, while it is there.

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[srcejon]

You'll also get that error message if one of the DLLs it depends on is missing. So, it will fail if it can't find acars-2.dll

You may also be missing - C:\WINDOWS\system32\VCRUNTIME140D.dll and only have C:\WINDOWS\system32\VCRUNTIME140.dll (without the D at the end)

If so, I'll rebuild acars-2.dll to use C:\WINDOWS\system32\VCRUNTIME140.dll

[jaro61]

You'll also get that error message if one of the DLLs it depends on is missing. So, it will fail if it can't find acars-2.dll

You may also be missing - C:\WINDOWS\system32\VCRUNTIME140D.dll and only have C:\WINDOWS\system32\VCRUNTIME140.dll (without the D at the end)

If so, I'll rebuild acars-2.dll to use C:\WINDOWS\system32\VCRUNTIME140.dll

Yes, you're right. I miss that library.

[srcejon]

Give this a try: https://sdrangel.org/downloads/sdrangel ... -win64.exe

[jaro61]

Good job. It already works as it should. I'll play with it tomorrow.

[jaro61]

Do aircraft transmit ACARS all the time or only in certain situations? I monitor 4 frequencies, but I can't even pick up a plane 12 km from me.
I am also attaching a log statement.

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[srcejon]

Unlike ADS-B, they only transmit ACARS fairly infrequently.

The fact that samples are being dropped, suggests your computer is overloaded. There's no point in having a sample rate of 3.2MSa/s for ACARS. It only really needs to be fast enough to give you enough bandwidth to cover the channels you are interested in. So set your centre frequency to 131.7 and then you can reduce the sample rate to 1MS/s or less. You can probably also close the two decoders at .525/.550, as I rarely see anything there - but it depends where you are.

Then setup your spectrum / waterfall so you can see what signals there are. You will probably want to turn RTL SDR gain up to maximum. Is your antenna outside?

[jaro61]

First success. The antenna is outside, but only on the window. Vertical dipole.

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[jaro61]

Another surprise on a different frequency.

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[jaro61]

I don't understand one thing. I capture two packets in the ACARS system. The package also includes a flight label. But according to FlightRadar24, no such flight exists. How is it possible?

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