User Manual

AS4000 Subscriber Terminal
Installation and Commissioning
GSI 002
605-0000-454
Draft Issue 1.3 Date 8/02/00
Page 4 of 14
3.1 Antenna
The antenna is a sealed weatherproof unit that is mounted on the outside of the
customer’s premises. The unit is normally positioned on an outside wall or a
mounting that faces the general direction of the CT antenna. The ST should be
sited to avoid large obstructions in proximity to and in line of sight from the ST
to the Antenna. See the ST installation and commissioning manual for deployment
rules.
The Antenna unit contains a flat plate antenna and a Low Noise Amplifier (LNA).
It connects to the IF Drop cable using an F type connector. Power for the LNA is
provided via the drop cable.
3.2 Antenna Mounting Pole
The antenna is normally pole mounted on a 38mm(1.5”) Pole (provided by the
service provider). Adjustment of the CRU (in the azimuth plane) is achieved by
rotating the antenna around the pole, the optimum positioning being determined
by measuring the strength of the incoming signal, usually in the direction of the
CT antenna.
3.3 Antenna Mounting Bracket
The antenna Mounting Bracket fixes directly onto the wall of the building and
provides adjustment (in the azimuth plane) of the CRU in an arc over 150°, the
optimum positioning being determined by measuring the strength of the incoming
signal, usually in the direction of the CT antenna.
3.4 IF Drop Cable
The drop cable connects the internal CRU to the Antenna via an environmentally
protected F-Type connector that is plugged into the backplate of the Antenna.
The IF Drop Cable is 50m or 100m with a 40mm maximum bend radius.
In general, the customer has access to the same range of facilities that are
supported by a conventional copper pair. For normal telephony services, these
could typically include:
• multi-frequency or loop-disconnect dialling
• subscriber private metering
• intrusion tone
• malicious call interception.
• caller line identification
Note. Line reversal is not supported.