LNB Saturation Calculator

Updated 05 February 2018

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This calculator calculates total LNB
power for all carrieres on one polarisation.

On a single polarisation it can be "worst case" 60
transponders.30 in lowband and 30 i highband.

For standard Universal LNB's both highband and lowband must
be taken in to consideration. For LNB's with only one local
oscillator

frequency only highband or lowband needs to be taken into
consideration.

To avoid intermodulation noise in the LNB
as result of saturation it is recommended that the LNB Output
power is 7dB lower than the LNB's 1dB

compression point. A good LNB has a compression point higher
than +5dB.

To find the compression point see the datasheet for your LNB.

LNB's should be designed to work with a
total satelite EIRP of 70dBW without being saturated. This is
extremly important to avoid LNB saturation

when new satellites( more power) is added on a orbital
position.

20©01-20©15 Jens T. Satre