Global Invacom Quad GTU User manual

Quad and Quatro GTU Installation Guide
Introduction
The purpose of this guide is to enable the successful installation of the Global Invacom FibreIRS
Quad or Quatro GTU
This guide assumes that;
The GTU is connected to a suitable Global Invacom FibreIRS Passive Optical Network
(PON), providing minimum optical signal levels of -12dBm at the connection point of the GTU.
The GTU has been installed in a dry environment and mounted with suitable fixings.
The installation is carried out by a competent person.
All ferrule end faces of the FC/PC optical connectors are cleaned prior to making a
connection using a suitable fibre optic cleaning kit.
Cables and Connections
Cables used should be industry approved coaxial cable and should be terminated using an F type
connector.
Fibre optic cable should be Global Invacom approved single mode with FC/PC connections.
Mounting
Ensure the back plate is mounted on a suitable wall or flat surface, with enough room to allow the
cover to slide on and off, sufficient space should left for the cables to exit the unit. Click the GTU into place
as shown in the diagram (Fig.l and Fig.2)
Fig.1
Fig.2
Next connect the fibre connector into the optical input of the GTU (ensuring the end is cleaned first)
as per the following diagram.
Always ensure the end of the fibre is clean before commencing.
1) Align the key-way on the FC-PC connector, with
the key-way on the fibre receptacle. Push the
connector firmly into the socket.
2) Ensure the key-ways are firmly located before
rotating the coupling ring clock-wise onto the
receptacle (inset picture).
Note: Failure to follow these instructions correctly will result in attenuation.
GC102060-1 Commercial & Confidential
Rotale clock wise finish

Quad and Quatro GTU Installation Guide
If using pre-terminated fibre, coil the fibre around the base in the slot provided (Fig 3), up to 1.2m
of Global Invacom 3mm armoured fibre (GI-3.0) can be coiled in this way.
Fig.3
If using a splice, coil the fibre so that the splice tube aligns to the centre of the groove on the side
of the base plate (Fig.4) tape down the coiled fibre on to the GTU. Push the splice tube into the slot on the
side of the base then coil the fibre around the base ensuring it is inserted in the slot, Covering the splice
tube with at least one layer of protected fibre as shown in (Fig.5)
Fig.4 Fig.5
Use a conventional signal level meter or spectrum analyser to check the output signals for both
satellite and terrestrial on each output, both types (Quad or Quatro) GTU's can be powered from the
meter. Connect up the required coaxial cables to each of the outputs. On the Quad version if terrestrial as
well as satellite is required connection should be made via a standard triplex/quadplex wall plate as the
terrestrial is diplexed onto all four satellite outputs. For the Quatro version the outputs should be
connected directly into a multiswitch.
If only terrestrial is to be used then an external power supply (available separately) should be
attached to power the GTU unit.
With all cables connected, place the cover over the unit (making sure not to trap any fibre) then
slide up to click into place.
Once all set top boxes are connected and powered up, check for correct operation.
GC102060-1 Commercial & Confidential