Naar Galaxy 19

Re: Naar Galaxy 19

Postby fuifnummer » Sun 15 Apr 2018, 00:39

Good job John. I am at 50% quality 82 signal.. on 76 cm

Will move the big dish 100cm later, as it heavy..
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Re: Naar Galaxy 19

Postby sparkycivic » Sun 15 Apr 2018, 03:55

Don't forget about rotating the LNB! clockwise alignment is quite different between 97'w and 113'w, and is an easily forgotten final step, but can make a large difference in quality, since this is how same-frequency signals of the opposite polarity must be rejected.

I expect the quality readings from G19 to be much higher compared to the previous old signal at 113'w in USA.

Auke
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Re: Naar Galaxy 19

Postby fuifnummer » Sun 15 Apr 2018, 14:57

Hi Auke,

Looking from which side do you determine the direction of the LNB.

F
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Re: Naar Galaxy 19

Postby sparkycivic » Mon 16 Apr 2018, 00:41

The top mark on the lnb should be aligned according to your longitude, and usually just takes the approach of trial-and-error. some dishes don't have any marks for skew, so you will be stuck with trial-and-error.

For my location at 100'W, it ends up being just slightly east of vertical, which is roughly 13.3 degrees clockwise(me looking at face of dish) from where had been for 113W.

If you have a spectrum analyzer, you can use it's display to easily adjust the lnb skew to achieve the maximum amount of difference between the signal peaks, and the valleys in-between.

you can use websites like "satbeams" or "dishpointer" to predict the lnb skew for your location and satellite.

So to answer your question: the skew readings from websites seem to be given clockwise from the perspective of the person standing looking at the face of the dish, so -10 degrees the top of the lnb would be toward your left, and =10 degrees would make the top of the lnb on your right.
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Re: Naar Galaxy 19

Postby fuifnummer » Thu 19 Apr 2018, 16:21

Very clear, need to adjust Thanks
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