Vertical/Horizontal polarisation signal quality

will3001 · 31-07-2009 12:23pm #1

Hello
So I seem to have quite good quality signal on vertical polarisation ~ 80% but very poor on horizontal 10-15%. I've tried rotating the LNB a bit but not sure how much it needs. Is this a typical problem or more tricky. I have one of the 80cm LIDL set-ups....

Thanks
Will.

watty · 31-07-2009 5:31pm

check on Quality, not Level,

The cable should be about 7 o'clock looking at front of dish

will3001 · 31-07-2009 5:57pm

yup its quality I'm looking at....as I said vertical is fine but horizontal poor...alignment to the 7 o clock position looks ok to me at least....could it be anything else?

watty · 31-07-2009 6:38pm

check a bunch of different channels

will3001 · 31-07-2009 7:15pm

Yeah just done that...seems to be the same on all..
I have 85% strength but quality is only around 15%....also it fluctuates a little as well strength wise....as in back to 10% and then up to 80% again...

watty · 31-07-2009 8:06pm

Maybe faulty PSU on receiver or a faulty LNB
one polarity is 13V (V) and the other is 18V (H).

go to a H channel and twist LNB by 90 degrees.
if it goes good then you need to check the voltage in cable with a multimeter.

13V for V
18V for H
(tolerance about +/- 1V)

Vertical/Horizontal polarisation signal quality

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