Archived from groups: alt.video.satellite.mpeg-dvb (
More info?)
No skew is needed on LNBFs since your reflector is skewed already.
! Check your LNBF settings.
! Make sure you have the correct LO frequency
! Check this forum and post your inquiry there:
http://www.sadoun.net/index.php?c=6
Zoyburg wrote:
> jaimesummer@yahoo.com wrote:
> > Hi,
> > I have a wavefrontier toroidal 90 dish. The instructions don't
> > address skew for the LNB, I guess most applications are intended for
> > circular polarized ones for Direct or dish or evu. Well I am trying to
> > get AMC4 (see previous posts) and can't get more than 3 video and two
> > radio channels no matter what. I can get a huge number on T5. Played
> > with skew of LNB and nothing seems better than straight up and down
> > with respect to dish which is skewed itself. Wrote email to
> > wavefrontier and they say I don't need to skew the LNB. Seems to me
> > that the skew of the dish is not the same as the skew angle associated
> > with the LNB, any ideas? Also, since there are two reflectors, if the
> > LNB did have to be skewed, should it be a mirror image of the skew on a
> > single reflector dish (similar to the fact that you have to use
> > inverted circularly polarized LNBs for direct and dish)?
>
> If the dish is skewed, then the LNBs don't need to be skewed.
>
> Imagine looking at a flagpole that's stuck in the ground at 45 degrees.
> You can turn your head to line up with it, or you can turn your body,
> in which case you don't need to turn your head separately.
>
> I imagine that for your dish to be skewed correctly, the skew needs
> to be set according to the satellite that the center of the dish is
> pointed to. I could be wrong on this, though, so be sure to check
> with your installation instructions.
>
> > I'll throw in another question. When I do a power scan on my fortec
> > ultra lifetime, it gets more hits than the 5 channels I get. I assume
> > the rest of these are scrambled or other signals? Also, the
> > transponder frequencies don't necessarily comply with what is stated on
> > the Lyngsat site. For instance, the WVGN is supposed to be 11991V but
> > I don't get that particular frequency but others in that range. If I
> > try advanced scan and put in 11991 V and the symbol rate that Lyngsat
> > says, I don't get anything. I try a few MHZ on either side of 11991
> > and vary the symbol rate also with no luck. Have a spare primestar
> > dish, will try that next in case it is toroidal not being strong enough
> > (although Dish is very strong as is T5 and a few other Ku sats).
>
> No idea, sorry.