Install Note of 20 Degree Clearance

[KeithAP]

The manual on the Slimline states "...a 20 degree span clearance (from 99 to 119) for an unobstructed view of the five satellite locations".

Does anyone know if this translates to 10 degrees each side of the installed azimuth heading - or some other offset pair values such as 5/15, etc.

In my case in Colorado, my heading is 164 degrees, so do I need to ensure clear sky 154-174 degrees or something else?

Thanks

[Davenlr]

Dish aims at 101, so you would need -2 east to +18 west from the 101 slots direction.

[veryoldschool]

Dish aims at 101, so you would need -2 east to +18 west from the 101 slots direction.
"plus a bit more", for any movement of trees in the wind, etc.

In a "tough spot", you can have obstacles between the SAT LOS, but not blocking the LOS.

[AntAltMike]

You actually needs a little less opening than that, because the 20 degree span between the end satellites is measured on the geosynchronous arc, whereas you are measuring its projection onto a horizontal plane.

There are azimuth calculators available on the internet. Here's one. (http://www.csgnetwork.com/geosatposcalc.html)Just plug in your location and run it for 99 and 119 degrees to see most precisely whether you have line of sight to those slots.

[BattleZone]

Except you actually need MORE, because the 9 degree seperation of the sats is from the point of view of the planet as a whole, as measured from the center of the Earth. From the *surface* of the Earth, the look angles are wider. Plus, as has been pointed out, you need a couple of degrees to assure clearance from blowing tree branches and the like.

Note that this requirement was based on the original LNB pack for the Slimline, which is now referred to as the SL5 (Slimline 5-LNB pack). Today, in most areas, the standard Slimline LNB is the SL3, which only needs to see 99-103, centered on 101, which is a much narrower slot in the sky.

The SL5 is only needed by folks with Latino programming, Jade World (Chinese), or if you are in one of the few DMAs where your SD locals come from the 119 sat. Today, installing the SL5 LNB is the exception rather than the rule.

[KeithAP]

Thanks for the help on this - the key point was the centering on the 101 sat and only needing a few degrees east. Only had to remove 4 40-footer trees with this info - instead of the eight I was contemplating had it been -10/+10.

Got my signal in all upper 80's-90's!

[Mertzen]

The SL5 is only needed by folks with Latino programming, Jade World (Chinese), or if you are in one of the few DMAs where your SD locals come from the 119 sat. Today, installing the SL5 LNB is the exception rather than the rule.There really are more then justba few dma on 119. Check out lyngsat and you'll see.
And even in SL3 markets plenty of SL5 are installed.

[raoul5788]

The SL5 is only needed by folks with Latino programming, Jade World (Chinese), or if you are in one of the few DMAs where your SD locals come from the 119 sat. Today, installing the SL5 LNB is the exception rather than the rule.

I think something like 46% of sd locals come from 119.