Add C-band or not?

[anto@]

for sure your installation site will be surrounded by signals that will disturb the 3400 4200 range, but I must also say that the cost of a C band LNB compared to what you are investing in your system will certainly not make you fall into misery once installed your system just put a popular C band lnb next to it and you will see if you receive something, for the feeds better go to KU band, if I have a system that you want to make of C band lnb I would put 2 unon for the linear and one for the circulars, obviously first I would take one for a test, at most you will spend € 50/60 of material

 

[satesco]

Some of the newer "C" band LNB's have a 5G filter built in, may or may not help, depends on how close you are to a 5G tower, and is it in your beam-width of the dish, or to the side of the LNB.

Probably the 5G filter lnb is valid in a less toxic environment with interference.Unfortunately in my location with such a lnb I did not succeed much.It is true that my antenna is installed next to many mobile antennas.And I did tests with MediaStar 5G Filter lnb at several positions with the same result,not great.
The only way to reduce interference is a large antenna,over 2.5m.Besides,the lnb only works between 3.7-4.2GHz.In fact all anti-interference lnbs work with this input.
The greatest signal attenuation occurs between 3650-3800 MHz,even when the signal is strong.This is why I recommend a large antenna for C-band.It is the best "lnb" of all possible solutions.
Here's what the interference area looks like on the analyzer with a so-called 5G lnb.