AMPLIFICATION OF ADJACENT CHANNELS USING A BROADBAND AMPLIFIER
the output level of a broadband amplifier is a function of the number of input channels:
vout = vout.max. – 7,5 log (n – 1)
v out is the expected output level.
vout.max.is the nominal output level of the broadband amplifier.
n is the number of channels.
this mathematical formula is not suitable for most of the installers.
in the technical information supplied by the manufacturers, this formula is converted into a table for direct application in the field.
in practice this v out has to be reduced when taking the following into account:
the typical frequency response of a channel amplifier is:
typical frequency response of two adjacent channel amplifiers.
ch2 vestige could interfere with ch1 if its level were high enough.
typical frequency response of two non adjacent channel amplifiers (1 guard channel):
ch2 vestige cannot interfere with ch1 even if its level is high enough.