Andrew Wireless Innovations Group BCEL-1915BA User Manual

Rel 00 08/04/98                         

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Tekmar Sistemi S.r.l. keeps the right of any change or improvement without prior notice.

 

Pag.9/15

The system uses FC/APC optical connectors; DO NOT ATTEMPT TO INSERT OTHER

CONNECTORS, OTHERWISE SEVERE DAMAGE MAY OCCUR.

The FC/APC connector is a high precision optical alignment device; it must be handled with care,

to avoid scratches and other mechanical/optical damages that will impair or reduce the system’s

performance.

Do not touch the connector’s tip, and clean it with proper tissues before inserting them into the

sleeve. Do not leave connectors open. In case of better cleaning need, use only pure ethyl

alcohol.

Sleeves can be cleaned by injecting pure gas under pressure.

Refer to Table 1-2.

Two types of local interfaces are provided: a local interface  composed of a 6 HE Subrack

(TPR912), 6 plug in local interface modules and one or more RF combiner, depending on the

system configuration or a standalone local interface.

The plug in interface modules must be handled with care and only by expert people paying

special attention to the optical fibre cables. In case you need to remove a local interface, you

Local interfaces cannot be placed close to each other; one 7te module is always required.

It can carry up to 6 Plug in local interfaces and the ancillary parts required by the system

configuration. The TPR912 includes the AC mains power supply, the required auxiliary circuitry

and alarms.

Alarm: a 9 pins sub D connector (male) on rear panel is used. See table 1 for functions and

pinout. All alarms are relay-contacts, where the relays are excited when NOT ALARMED.

If a local interface is not used, its related female connector on the backplane has to be closed by

a replacing male connector, which is provided together with the rack.

Refer to table 1.

The downlink laser transmitter is internally connected to an optical splitter, which provides four

outputs.

The RF input port (SMA-female) must be connected to the BTS TX path, at the appropriate level

(see specifications), eventually through the appropriate combiners configuration.