Polytron SCA 32, User Manual

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4 Recommendations to optimize operation

Every Sat tuner will get an explicit (SCR/dCSS) user band frequency, please note. It must be
ensured that two receivers don’t use accidentally the same user band frequency.

Twin tuner needs the assignment of two user band frequencies! The signal must not be
looped through from >Output Tuner 1< to >Input Tuner 2< but should be splitted by a
2-way splitter e.g. (Polytron-Type: FVS 2 P) and connected to both tuner inputs directly.

Sat tuners with the longest cable distance should be attached to the lowest user band
frequency, Sat tuners with the shortest cable distance to the highest user band frequency.

The preferred use of the lower user band frequencies is recommended if less than 32 tuners
are connected.

On some receivers the user band counting begins at „0“. In the case of such specific devices
you have to counting down accordingly.
Example
: either „0 up to 31“ or „1 up to 32“.

Use at least double shielded antenna cable with high quality and a screening capability not
less than 90dB.

Please ensure that the used antenna sockets are compatible with the latest SCR/dCSS
technology and enable a bidirectional signal transfer.

At least one DC decoupled terminating resistor is needed if the SCA 32 is mounted inside a
tree structure with pass-through sockets. As last socket in such a distribution system a pass-
through socket has to be mounted, this one is completed by means of a terminating resistor.
This resistor has to be DC decoupled (Polytron-Type: AW 75 DC).

We recommend the use of the provided power inserter for powering the LNB and the SCA 32
because this ensures the stable function of these components.
The provided AC/DC adapter can also be connected directly with [Output 2] if this output is not
in use. The power inserter is no more required in this case.