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Skew or not skew?




>On Saturday 20th July, an installation company will fit a 1m motorised
>system to the roof of my house.  They have said that I would be better
>off with a standard universal LNB than a proper multiband one, since
>the magnetic polarisers in the latter lose more signal than I would by
>having a standard LNB and not an optimised skew for each satellite.  They
>say that this will have all but a tiny part of the spectrum coverage that
>I will require.  The receiver is a Pace MSS1000 with positioner upgrade.
>
>  I could go for a mechanically polarised LNB but that apparently will
>cost a small fortune compared to a universal LNB.  I want to keep the
>cost to sensible proportions; the dish, actuator, installation and 
>postitioner are already costing quite enough.  But is this going to
>be a false economy?  How bad will it be on Intelsat 601 for example
>where the skew error could be appreciable?
>
>  Any comments?  Trouble is, I've only got one week to make a decision...
>
>
> |      | \/ | |  |               Colin McCormick

For a turnable dish I would prefer a LNB with separate polarizer in order to 
adjust the skew-values on extreme east/west satellites. If you will watch 
only satellites between 19 east and 18 west an LNBF will do the job. The 
signal loss of a magnetic polarizer ist minimal and will do no harm to the 
signal strength if the dish is large enough. Carefull skew adjustments allow 
even the reception of circular signals (DBS) in most cases. An LNBF would 
not deliver the same performance.
Christian Mass (Dr.Dish)
Editor of TELE-satellite magazine
Home-page: http://www.TELE-satellit.com
and
Producer of DR.DISH TV
The first European Satellite Information Channel
Home-page: http://www.sat-net.com/drdish/



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