dSCR Multiswitch
TdSCR504/508/512
EN
2
Switch Installation
The equipment should be mounted in a well-ventilated area.
Connect the power supply to the switch, and switch on. When connected, a green LED on the front of the switch
should be lit. No powering from the Set Top Box is required.
The power supply can feed up to 4 Multiswitches (4 x 4 outputs). All four Satellite trunks have DC available on inputs
and outputs, except if the switch is used as a terminated unit. There is no power on the Terrestrial trunk line. All
unused dSCR/Legacy (Tap) outputs should be terminated with a 75-Ohm terminator to maintain good terrestrial
signals.
All trunk outputs can be cascaded. If the switch serves as a terminated unit, turn on the switch marked “terminate
line outputs”.
Configuration of the Switch
Terrestrial amplifier
The Terrestrial trunk has an integrated amplifier, with unity gain on the dSCR output, that can be attenuated by up to
20dB.
Satellite input
The Satellite input level to the switch, should be between 70dBuV and 100dBuV. There is no adjustment required, as
the switch has Automatic Gain Control (AGC) within this dynamic range.
Input Modes: Quattro and Wideband
The input connections on the product can be configured in either “Quattro mode” or “Wideband mode”.
When using Quattro LNBs, the toggle switch on the top right hand side of each Switch should be set in the upper
position (Quattro LNB). The Switch will then expect to receive, on each of the 4 inputs, a satellite signal from 950 to
2150MHz (Horizontal/Vertical High and Low band).
When using wideband LNBs, the toggle switch, on the top right hand side of each Switch should be set in the lower
position (Wideband LNB). In this case, wideband satellite signals from 290 to 2340MHz should be used (Vertical and
Horizontal).
In this mode, 2 wideband LNBs can be connected, for signal reception from 2 orbital positions. The left wideband
inputs V-H are the DiSEqC position “LNB A”, and the right V-H inputs are the DiSEqC position “LNB B”.
