Dc Power - Johansson 9733PL User Manual

dCSS/dSCR Multiswitch (Ref. 9733PL & 9734PL) v1.0
2.3.

DC Power

Powering the units can be done in 2 ways:
1. From STBs : each STB has to power its connected unit. In this case, the LNB itself will
not be powered from the 9733PL/9734PL and has to be done from another power
source.
2. From the trunk lines : all of the cascaded dSCR multiswitches can take DC power
from the trunklines. Adding DC on trunks can be done by using a power insertor (Ref
9669) and a powersupply (Ref 2460) on 1 of the vertical trunk lines. See chapter 1 on
hardware installation for a typical example. This setup will also power the LNB and the
trunk amplifiers.
A powersupply (Ref 2460) is designed to power up to 6 of these dSCR multiswitches in
cascade. When connecting more than 6 dSCR multiswitches, it is adviced to add more
powersupplies.
Block diagram of the DC paths inside the 9734PL (the 9733PL is similar with only 1 STB
output):
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