Fruity LNB Cover

Llew · Sep 29, 2016

I find these little fruit pots ideal as a rain cover for my Inverto LNBs.

A five minute job to cut the base to size and fit (eat contents first though).

Other fruits available, indeed other supermarkets too.

Terryl · Sep 29, 2016

But how does that protect from signal loss due to all the rain (and moisture in those very dark clouds) 10000 to 30000 feet up??

Archive4 · Sep 29, 2016

Those clouds that high up don´t tend to cause a major loss in signal ( snr )
However, when them clouds split and start dropping their contents, that is when the problem is augmented.
Would like to know if the change in fruit makes any difference to reception?
Also ( actual serious question ) water droplets on the front of the cover, compared to water droplets on the lnb cover, amount of variance?

Terryl · Sep 29, 2016

Milamber said:
Those clouds that high up don´t tend to cause a major loss in signal ( snr )
However, when them clouds split and start dropping their contents, that is when the problem is augmented.
Would like to know if the change in fruit makes any difference to reception?
Also ( actual serious question ) water droplets on the front of the cover, compared to water droplets on the lnb cover, amount of variance?

Sorry beg to differ, we in the CATV industry had many problems with storm clouds (rain or snow) causing a big enough drop in signal without rain or snow at ground level, all we could do to fix this problem was go to bigger dishes, anything under a 15 footer for the "C" band feed satellites was risky at the head end, and we didn't use "kU" band for feeds at that time, but "kU" band has major problems with several tons of water vapor in the way, that's why we stuck to "C" band.

Now with snow build up we had to sometimes put the dish(s) inside of heated radomes, this fix that problem.

Water on the LNB cover or on the dish it's self is not causing a direct drop in signal but a diffraction (scattering) of the signal, this is the loss you see, remember the signals from the satellites are in the pico watt range (-90 to -120 dBM) by the time they get down to the dish, a large bug can cause a drop in signal at those levels.

Archive4 · Sep 29, 2016

Terryl said:
Sorry beg to differ, we in the CATV industry had many problems with storm clouds (rain or snow) causing a big enough drop in signal without rain or snow at ground level, all we could do to fix this problem was go to bigger dishes, anything under a 15 footer for the "C" band feed satellites was risky at the head end, and we didn't use "kU" band for feeds at that time, but "kU" band has major problems with several tons of water vapor in the way, that's why we stuck to "C" band.

Now with snow build up we had to sometimes put the dish(s) inside of heated radomes, this fix that problem.

Water on the LNB cover or on the dish it's self is not causing a direct drop in signal but a diffraction (scattering) of the signal, this is the loss you see, remember the signals from the satellites are in the pico watt range (-90 to -120 dBM) by the time they get down to the dish, a large bug can cause a drop in signal at those levels.

Sorry Terryl, forgot everything on your side of the pond is bigger and better;) obviously includes the clouds and their affect on the snr.
Thankfully, we in KU land have Tonnes of water, which are also smaller, so have less affect on the signal.
With regard to problems at the head end, too much Budweiser perhaps?

Terryl · Sep 30, 2016

Sorry I will go away and shut up.

satelliteman · Sep 30, 2016

We will leave this one here.

Fruity LNB Cover

Llew

cerca trova...

Terryl

Specialist Contributor

Archive4

Guest

Terryl

Specialist Contributor

Archive4

Guest

Terryl

Specialist Contributor

satelliteman

Administrator