autosat 2 dish problem

[des]

a particularly violent gust of wind has broken my dish drive. the dish is now free to move up or down, rather than being driven and locked by the motor. i assume there is a pin or similar somewhere inside the unit which has sheared. any expertise out there?

des

 

[adventure]

I think you have diagnosed the fault already, the only way to identify the part would be to strip the unit down, LCS are the only people I know who do this system

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nick

 

[des]

thanks nick. will speak to them monday.

des

 

[des]

now the wind has died down, have been up to inspect properly. bolts had loosened, so i have tightened them. dish now operates correctly, but signal is very weak. suspect either damage to lnb or lnb alignment problem.

des

 

[adventure]

Thanks for the update Des, you may find that the skew angle has shifted it is just a case of turning the lnb to the correct setting, easiest done once the dish is up and locked so you can see the signal strenght and quality

nick

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[des]

hi nick

thanks for that. have had a further play. receives sky news ok, but other channels v. poor or no signal. itv1/2 ok-ish, but nowt on bbc channels. so i assume the lnb must be ok. what is skew angle, and how do i adjust?

des

 

[ruffingitsmoothly]

Hi
LNB rotational position ("skew") has to be set to the correct angle so that horizontal and vertical signals are received with equal strength. It optimizes the cross-polarization isolation between signals of vertical and horizontal polarizations, and has strong influence on quality of digital signal.

Basically standing in front of the dish it's like turning a steering wheel one way or the other

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Of course make sure the van is level before you start!!

Regards Pat

 

[des]

thanks all.

it was the skew angle. while i was a dave's motorhomes, having another job done, he jumped (climbed) up on the roof, and set it to the correct angle. all perfect now.

des