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.12/15

Two LEDs give local status information (LD1 red, LD2 green) as follows:

LD2 lights when power supply is on.

LD1 lights as resume alarm in case of no optical power at downlink input and/or in case of failure.

The uplink laser is switched on only if downlink optical power is present. In case of any failure, the

laser is switched off.

By this, the unit gives information on its operating status at local interface.

This device contains a power amplifier and a panel active antenna. It provides amplification and

radiation of pager carrier at 280 MHz.

The RF input (SMB-M) must be connected to the Paging RF port through a SMB-F/SMB-F cable.

The power supply is provided through RF cable.

7.3.2  

This antenna has been designed for radiation of pager carrier at 280 MHz. It is provided with a

1-meter long N-female connectorised cable.

This antenna has been intended to include on a compact single element all the needed radiators
of a multiple BriteCell system; it allows to minimise visual impact and installation effort.
It carries on a single, compact radome the high gain radiators for GSM, DCS, PCS, VHF Paging.

 DOWNLINK AGC

The AGC function is provided in the downlink path, to maintain a constant link gain versus optical

loss, within the expected range (0 to 3dB).

The unit includes an RF attenuator, which has been provided to give flexibility toward coverage

design. In case of closer mobiles forecast, the attenuator can reduce the uplink gain by 5 or 10

dB. Refer as follows for S1 attenuator settings (bits 1,2,3,4):

Bit 4 must be always on.

Bit

1   2   3   4

——————————————————————-

Full gain:

0   0   1   1

5dB reduction:

0   1   0   1

10dB reduction:

1   0   0   1