Inverto Multiconnect system - does not impressed me at all.

BombedOne

BombedOne

Regular Member
My Satellite Setup
Covering 30W-105.5E range, two motors, C and Ku band. Various receivers/cards/cams/etc.
My Location
Republic of Georgia
A friend of mine bought me for tests the special holder and two narrow LNBs, to check how they perform. Main point of interest was to receive 13E+9E in multifeed configuration. Since 9E signal is quite low here (on 1.2m during the bad weather certain TPs fade away), I've decided to test it on my 1.5m offset dish (BILSAT made, Turkish company). Results were disappointing - signal strength is low,compared for plain LNB. For example, where I'm getting SNR 5.2dB with cheap LNB, with these LNBs I got only 3.4dB. I will try to conduct additional tests on dish with wider opening angle (speaking in plain terms - cheap and smaller dishes), because, during the adjustment of multifeed configuration, I've spotted weird, but interesting situation. Say, 13E is in center, so LNB at the right, next to it will be 9E. The 9E LNB will give the best result in that case. But, if I move it further to the side (say, to 5E position), but rotate it with it head pointing to the left side, I'm still getting the strong signal! this clearly indicates that dish illumination area clearly is out of LNBs feedhorn shape, so specialised dish may be needed.
 
The 4 degree spacing on a 1.5m antenna means you would not need the multifeed system and LNBs from Inverto. The feed on the LNB isn't optimised for any particular f/d ratio, and probably is not a good match for the dish you have been using.

The bar and narrow LNBs work well on smaller dishes to get three degree spacing, similar to the Marconi 'bullet' LNBs of the last decade.

I have fitted two sets on the 80 and 54cm Orbital dishes and the adjustability of the bar, the individual height settings, and the individual skew settings make the Inverto system very easy to set up for optimum satellite performance.
 
Above 80cm dish size the very narrow LNB s are not needed for 9+13e, the Inverto Black premiums are narrow enough and work just fine. Any larger than 1m, normal sized LNBs shoould be Ok. Interesting to note though, that the bullet-nosed don't perform as well as standard.
 
I find Alps work just as well as most generic LNBs.
 
Low Profile said:
I find Alps work just as well as most generic LNBs.
Click to expand...
There's no comparison between an Alps and the Inverto bullet nosed LNB. I use these on big prime focus dishes (1.8 - 2.4m) with 28ºE in the breach (Global Invacom flange LNB and feed horn) and the Inverto on 26ºE. The Inverto needs to be touching the outer scalar ring so using the Alps would be impossible due to its much larger diameter.

Anyway the moral of the story is these LNBs are designed for reception of powerful satellites on small dishes where it is impossible to fit a more bulky LNB (the body of the Alps is enormous by comparison). It has never been sold as a fringe reception LNB, and, on weak satellites using a multifeed setup is not a good idea anyway.
 
I don't know about longitude and an altitude of a place, where on 80cm dish you can receive 9E+13E using plain LNBs in multifeed, but here, that is impossible even using 1.2m dish - If you place 13E in the center, and next to it place another LNB, it will be pointing to 7E, not 9E, so narrow LNB's definetly needed here.
 
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