In article , Windmill
writes
In gusty winds, TV signals disappear and can only be restored by
powering the receiver off and on again. Or at least that's the only way
I've discovered so far to restore normal operation.

The setup is a little unusual: a satellite internet link (which
continues to work throughout the gusts, so dish pointing isn't the
issue), a DVB-S LNB offset by the appropriate amount so that it 'sees'
the Astra 2A-B-D satellites instead of the Europasat internet satellite
which the dish is aimed at, a dish motor so that I can look at other TV
satellites if I don't mind losing the internet connection, a
multiplexer on the roof to combine DAB, FM, terrestrial and satellite
signals, and a matching demultiplexer beside the receiver.

It all works perfectly if the wind isn't blowing, but gets into some
odd state where the TV signal goes from 90% signal strength and 73% signal
quality to near zero strength and zero quality after a variable number
of gusts.

Can you turn off the LNB power on the receiver to separate the potential
of it being an LNB lockup rather than a steering issue?

If it restores the LNB function it could still be a cabling issue with
movement causing transient interruptions to the LNB supply. I don't know
how sensitive LNBs are to such transients.
--
fred
it's a ba-na-na . . . .