LNB Skew - Techwatch Support Forums: Digital & Satellite TV, FTA, Cable, Computers, Mobile Phones, Apple and General Tech Forums

trev1978 · 13-12-08, 10:06 PM

Dear all!!!

How does LNB skew work on a motorised system???...do you set the lnb vertical?

Trev

FlyerUK · 13-12-08, 10:31 PM

Quote:

Originally Posted by trev1978

Dear all!!!

How does LNB skew work on a motorised system???...do you set the lnb vertical?

Trev

in a word, yes

at least you start there, and tweak it for best reception on your favourite bird, though generally if it's vertical it should be ok for most sats.

Robbo · 13-12-08, 10:53 PM

Yes, zero skew on a motorised dish.

This is because when the motor moves round the whole dish with LNB gets skewed.

nvingo · 14-12-08, 02:16 AM

In the olden days of analogue satellite broadcasting, the skew was controlled on a per satellite or per channel basis with a variable-voltage output on the receiver and a magnetic polariser collar between the feedhorn and the LNB. There being an effect where the magnetic field generated would twist the signal to correctly enter the single-polarity LNB.

13-12-08, 10:06 PM	#1 (permalink)
trev1978 Senior Member Join Date: Dec 2008 Location: Ballymena, Northern Ireland Posts: 170 Thanks: 193 Thanked 1 Time in 1 Post	LNB Skew Dear all!!! How does LNB skew work on a motorised system???...do you set the lnb vertical? Trev

13-12-08, 10:53 PM	#3 (permalink)
Robbo Satellite mad Join Date: Jul 2007 Location: Kent Posts: 9,374 Thanks: 97 Thanked 1,981 Times in 1,603 Posts	Re: LNB Skew Yes, zero skew on a motorised dish. This is because when the motor moves round the whole dish with LNB gets skewed. __________________ القمر الصناعي هو أفضل TM600 linux,TM6800HD,TM5200,TM1000,TM2200 motor, Triax TD110 dish. Electronics Engineer and satellite installer.MBC Satellites

14-12-08, 02:16 AM	#4 (permalink)
nvingo Senior Member Join Date: May 2008 Location: Cambs, UK Posts: 405 Thanks: 6 Thanked 65 Times in 61 Posts	Re: LNB Skew In the olden days of analogue satellite broadcasting, the skew was controlled on a per satellite or per channel basis with a variable-voltage output on the receiver and a magnetic polariser collar between the feedhorn and the LNB. There being an effect where the magnetic field generated would twist the signal to correctly enter the single-polarity LNB.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
19E azimuth / elevation & skew details	Analoguesat	Satellite FAQs	3	17-08-09 05:57 PM
Lnb voltage	sgw869	Satellite Help	4	02-12-08 07:38 AM
LNB skew setting - motorised installation	ferrymanr	Satellite Help	5	06-08-07 12:32 AM