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General information on installation
Use of the amplifier within a satellite reception system
The VWS2500 amplifier is used at the input to large multi-switch cascades or as a cascadable distribution network amplifier
for balancing the through losses of cables, branches or distributors in large distribution networks. It must be ensured that the
level at the input lies between 50 and max. 80dBµV, and the downstream multi-switches are not overloaded.
Setting the level for the amplifier
It is best to use an antenna meter such as an MSK130 to de-
termine the level. You can adjust the gain in 1 dB steps (see
illustration on the right). Each amplifier has its own adjusta-
ble attenuator available.
To compensate the slope of the attenuation, e.g. for long ca-
ble lengths, each sat amplifier can be set to 2, 4 or 6 dB pre-
emphasis (see the illustration on the far right). The terrestrial
amplifier is set to a fixed pre-emphasis value.
Connecting the amplifier to other devices within the sat
reception system
The quickest and easiest connection, for instance to a
through multi-switch, is achieved using the optional EMU250
plug connector (illustration on the right). Here the devices are
plugged into each other directly..
Installation instructions
►The device described is intended solely for the installation in satellite receiver systems and may only be instal-
led by trained specialist personnel.
►Any other use, or failure to comply with these instructions, will result in voiding of warranty cover.
►The equipment may only be installed in dry indoor areas. Do not install on or against highly combustible mate-
rials.
►The equipment must be provided with an earthing wire (Cu, at least 4 mm2).
►The safety regulations set out in the current EN 60728-11 and EN 62368-1 standards must be complied with.
►Fasteners for concrete substrates and masonry: 4 suitable plugs and associated screws with half-round or
cylindrical head, outer thread diameter 4.5 - 5 mm, head diameter ≥ 9 mm and a screw length ≥ 30 mm
For other types of wall, use the appropriate screws or screw-dowel systems, which oer the same or better
fastening
►Connector: RF plug 75 Ω (series F) to EN 61169-24.
►Unused subscriber ports should be closed o with 75 Ω resistors (e.g. EMK 03).
Risk of damage to property!
An inner cable conductor with a diameter greater than 1.2mm, or the presence of burrs may damage the device
inputs/outputs beyond repair.
Max. 2 mm
excess length
Clamping torque
max. 3.4 Nm
(danger of over-
winding)
Diameter
0.6 - 1.2 mm free of burrs
If the devices are further apart from each other, the use of high-quality coaxial cables (with
very high screening values) such as LCD111 is recommended. Where possible, use high-
quality F-type connectors as crimped connectors (illustration on the right) or as compression
connectors (see the Kathrein catalogue Satellite and terrestrial reception antenna systems).
When using coaxial cables, take particular care to ensure correct assignment of the inputs
and outputs to each other. The Vlow output from the amplifier must be connected to the
Vlow input of the multi-switch, etc.