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Detecting tv interefrences



Jan 1, 1970
There is something very stange in my home: my aerial has
an amplifier outside on the pole but inside the house I
need to connect to another amplifier because I want the
signal to be strong upstairs in all the rooms. The problem
is that it all works very well except for the frequency
of my Sky Digibox, which is completely distorted. The
question is, am I picking up some interference at that
particular frequecy, or are the amplifiers to blame
(it happened with 4 different amplifiers from 4 different
companies). The frequency of the Digibox is 68 and there
isn't anything I can do to change if like it's possible
in videos, it seems they have fixed it on this channel.


Jan 1, 1970
Suspect that the amps either are adding spurious signals causing the
distortion or it is possible that you are overloading the rf inputs of the
monitors your using. If the reception of your Digibox is interference free
without the amps then the amps would be suspect. However if the initial
quality of the Digibox is distorted you then are just amplifying noise. May
want to try good quality amps with additional traps or consult with a rf
tech. I presume that you do not have a signal strength meter to check the
level of the signal produced bu the RF modulator at the Digibox.

Joe McElvenney

Jan 1, 1970

As far a interference is concerned, most installations
these days have, as well as a TV and satellite box, a VCR
and possibly a DVD player. This is all a prescription for
trouble as they 'Speak in Tongues', at the same time and on
a variety of frequencies.

With a SKY box though, you should be able to change the
digibox output frequency as channel 68 is simply the
default one.

Try this -

0 (appears to do nothing)

and punch in a new number while trying to avoid your
local TV channels and 36 which is a common video output
frequency. If that doesn't cure it, then you need to look
at the amount of gain you are using. More is not
necessarily better in this case.

Cheers - Joe