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.10/15

The uplink optical receivers RF outputs are combined to a single RF port (SMA-female) to be

connected to the BTS RX path, eventually through the appropriate combiners configuration; this

connection might include an appropriate attenuator, not to desensitise or overload the BTS

receivers because of the noise floor and signals amplitude.

The local signalling (front panel) includes a green LED  (PWR ON), plus status and/or alarm

LEDs as follows:

Laser transmitter

A green LED lights when laser is biased (=).

Each of two red LEDS lights when the corresponding laser's power

decrease under limits and/or bias is not present (   ).

A yellow LED lights when laser has shut-down command (OFF).

Optical receivers

A red LED lights if the input optical power is lower than -12dBm (  ).

No adjustments are required at Local Interface Module.

Refer to table 2.

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).

The uplink optical receivers RF outputs are combined to a single RF port (SMA-female) to be

connected to the BTS RX path; this connection must include an appropriate attenuator, not to

desensitise or overload the BTS receivers because of the noise floor and signals amplitude.

The local signalling (front panel) includes a green LED  (PWR ON), plus status and/or alarm

LEDs as follows:

Laser transmitter

A green LED lights when laser is biased (=)

Each of two red LEDS lights when the corresponding laser's power

decrease under limits and/or bias is not present (  ).

A yellow LED lights when laser has shut-down command (OFF).

Optical receivers

A red LED lights if the input optical power is lower than -12dBm (  ).

Alarm/controls : a 15 pins sub D connector (Female) on rear panel is used. See table 2 for

functions and pinout. All alarm pins are O/C , low resistance to GND when NOT ALARMED.

No adjustments are required at Local Interface.