Downlink drift

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Fausto Arinos Barbuto

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Sep 3, 2026, 12:45:41 PM (4 days ago) Sep 3
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Hello,

When I find a satellite with a downlink drift like the one below:

Screenshot 2026-09-03 133614.png

What should I do? Set "Deviation, Hz" in "Signal Details" to +4000 Hz or -4000 Hz? Or it's something else?

73s, Fausto






Alex VE3NEA

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Sep 3, 2026, 5:06:56 PM (4 days ago) Sep 3
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Downlink drift is not a modulation parameter, it is an RF frequency error. It means that the signal will appear on the waterfall 4 kHz below its label. You can correct this using the downlink manual correction box.
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