3.4.3.1 Installing the RT unit on an existing tube, 76 mm in diameter Figure 17 – Installing the RT unit on an existing tube, 76 mm in diameter 3.4.3.2 Installing the RT unit on an existing tube, 76 to 114 mm in diameter Use the 3CC10802 Axxx kit.
3.4.3.3 Front installation of the RT unit Use a support in accordance with our 3CC11132Axxx model.
.4.3.4 Rooftop mounting of the RT unit (raised), 1 meter mast Use a support in accordance with our 3CC11133Axxx model.
3.4.3.5 Rooftop mounting of the RT unit (raised), 1.5 meter mast Use a support in accordance with our 3CC11134Axxx model. Figure 23 – Rooftop mounting of the RT unit (raised), 1.
1500 16 250 300 300 250 SPIT M1 450 260 Figure 24 – Quotation of the rooftop mounting of the RT unit, 1.
3.4.4 Grounding the RT unit Considerations – It is not necessary to establish special grounding connection for the RT casing. However the RT unit can be grounded. – On the RT unit, the ground terminal is in the form of a tapped hole (see Figure 25 – Grounding the RT unit) on the attachment axis of the pole mounting. – The RT unit can be grounded using the grounding lug and screw hardware supplied with the equipment. Steps 1. Crimp a lug (ref.
3.5 Installation of the Terminal Station RT unit with a non integrated antenna See Appendix 6 – Installation of the Terminal Station RT unit with a non integrated antenna. 3.6 Installation of the RT/NT link Considerations – The electrical connection between the RT unit and the NT unit of the Terminal Station is made using a type ET 2PA 981 75 ohm coaxial cable equipped with "F" connectors (at the NT side end) and "N" connectors (at the RT side end).
2. Note the length of the cable installed in the 7390 RT/NT cabling sheet (Appendix 1 – 7390 TS installation sheet). This information will be entered into the database when the equipment is commissioned using the configuration software. Note: The accuracy required by the configuration software is ± 1.5 m. 3. At the RT unit side end, equip the cable with a type "N" 75 ohm coaxial connector if RT «N» and «F» with RT «F», supplied with the equipment.
3.7 Installation of the Terminal Station 7390 NT (Indoor Unit) A SPACE OF 1U (in the event of rack mounting) OR APPROXIMATELY 50 mm MUST BE LEFT FREE ABOVE THE TERMINAL STATION IDU NEVER STORE DOCUMENTATION OR ANY OTHER OBJECTS ABOVE THE NT UNIT ON THE VENTILATION HOLES. THIS MAY CAUSE IT TO BE DAMAGED Considerations – The NT units are intended for indoor installation only. – The NT should be positioned in accordance with the needs of the user and the technical constraints (e.g.
3.7.2 Installation of the NT unit on a 19" rack Steps 1. Fit the rack adaptators on the NT unit (see Figure 29 – Fitting the NT unit rack adaptators). 2. Install the unit in the 19" (or other type) rack (screw fittings not included, depending on the manufacturer). 3. Connect the NT to the RT ("F" connector). M3x6 countersunk fixing screws Rack adaptator Figure 29 – Fitting the NT unit rack adaptators A SPACE OF AT LEAST 1U MUST BE LEFT FREE ABOVE THE ASSEMBLY 3.7.
Figure 31 – Earthing the (NCAxxx) NT Lite unit 3.8 Installation of one or more repeater modules Considerations – In the case of a coaxial cable to cover a distance greater than 70 meters between the 7390 RT and the 7390 NT, a repeater module is required to compensate losses. – Repeaters are installed indoors only, sheltered from dust and heat. – The repeater must be installed in series on the RT/NT connection (coaxial cable).
The variable length (≤ 70 m), is always situated between repeater and RT unit. The fixed length, 70 m, is always situated between repeater and NT unit. Second example: length of coaxial cable less than 210 m but greater than 140 m (here, 200 m). Two repeaters are used. repeater repeater RT Example: Fixed: 70 meters 60 meters Fixed: 70 meters NT Figure 33 – Installation with two repeaters Methodology 1. Select the installation location with respect to the location of the NT unit. 2.
3.9 Installation of one or several repeaters with splitter(s) Considerations – Where there are several NT units for a single RT unit, one or several splitter(s) need(s) to be used. – For a single RT unit it is possible to mount up to 8 NT units. – The splitter is installed in series on the RT/NT connection (coaxial cable). – The splitter has no individual power supply: it feeds the power through from the NT to the RT.
124 Figure 35 – Repeater Example of assembly This example is well suited to the distribution of NTs on the same floor of a building.
3.9.2 Installation directions for an assembly with 4 NT or 8 NT units (*) – The active splitter comprises 2 repeaters and 7 passive splitters, see Figure 37 – 8 NT assembly with active splitter* and Figure 38 – "4 NT" assembly with active splitter. – This set of components is located in a casing (if necessary, the active splitter may be assembled on-site via field cabling by the installer). – The cables between the passive splitter and the other components must then be less than 30 cm. long.
