User's Manual Part 1

ManualsBrandsAndrew Wireless Innovations Group ManualsElectronicsModel TFAM26 Downlink Booster

MN024-04

Module name:

Remote Unit

TFAxxx

Case A

Main processes carried out by the TFAxxx:

• In Downlink (DL) operations:

 Optical-to-RF conversion of the input optical signal

 Automatic Gain Control (AGC) of each converted signal, in order to

compensate optical losses (provided they are < 4dB);

 RF amplification: the converted RF signal is boosted in order to

maintain a good signal-to-noise ratio

 RF filtering: a proper filter rejects the spurious emissions which lie

out of the Downlink band

 RF duplexing and splitting: the boosted RF signal is conveyed to 2

antenna ports

• In Uplink (UL) operations:

 RF amplification: a low noise amplifier boosts the signal received

from antennas so as to maintain a good signal-to-noise ratio

 RF filtering: the boosted signal is cleaned from the spurious

emissions which lie out of the Uplink band

 Automatic Level Control (ALC): the RF signal level is adjusted

according to the blocking requirements

 RF-to-optical conversion of the signal, which is finally conveyed to

the output optical port.

RF ports:

• 2 RF antenna ports,

transmitting/receiving

signals to/from

distributed antennas.

RF antenna ports are

duplexed N-female

connectors. These RF

ports can be connected

to distributed antennas

either directly (i.e.

through RF jumper

cables) or through

external TLCN passive

splitters, thus allowing

more antennas to be

fed. Unused RF ports

are to be terminated

with a 50 Ω load.

• 1 RF auxiliary input

and 1 auxiliary output

(designed to receive

and transmit additional

signals like WLAN by

means of proper

booster TWBA).

Auxiliary input and

output ports are SMA-

female connectors.

Optical ports:

• 1 optical output port, transmitting UL signals to TFLN local unit

• 1 optical input port, receiving DL signals from TFLN local unit

(ext.adapter)

Power

Supply

DL optical

port

(SC-APC)

External

alarm

inputs

RF auxiliary

channel output

(

SMA-f

)

antenna

port (N-f)

Green LED = power on

Red LED = major alarm

UL optical