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Doc ref: xMOD200
Installation - Using A Masthead Amp
Although the MOD200 has a built-in combiner you may encounter problems when using
a “Masthead” amplifier which is powered remotely up the co-ax, as the MOD200’s internal
combiner will not pass this power. We recommend that you use an external DC combiner which
will pass DC power to the “Masthead” amplifier.
If the “Masthead” amplifier is being powered locally then the DC combiner will not be necessary.
If the amplifier has its own up the co-ax PSU then this can be inserted between the amplifier and
the RF IN of the first MOD200.
The example below shows how you would connect single or multiple MOD200s when using a
“Masthead” amplifier which is powered remotely up the co-ax.
Fit the supplied 75
Ω
RF terminator to the unused RF input on the first MOD200.
1
The external DC combiner merges the modulators output with the TV aerials output.
2
The RF distributor provides power up the co-ax through the DC combiner to the
Masthead amplifier.
3
2
1
3
RF Distributor
MOD200
Digital Modulator
TV Aerial
DC
Combiner
Masthead
Amplifier
Camera 1
DVR
HDMI
TV 1
TV 2
Camera 2
Camera 3
Camera 4
