Master Optical Trx, Tfln; Main Tasks Carried Out By The Tfln Module; Downlink (Dl); Uplink (Ul) - Andrew ION-B Series User Manual

4.3.

Master Optical TRX, TFLN

Main tasks carried out by
the TFLN module

Downlink (DL):

ÿ RF-to-optical conversion of the input
RF signal
ÿ Optical splitting: input RF signal is split
onto 4 optical outputs

Uplink (UL):

ÿ Optical-to-RF conversion of the 4
input optical signals
ÿ Automatic Gain Control (AGC)
of each converted signal to
compensate optical losses;
ÿ RF combining of the 4 adjusted
signals into a single RF output

RF ports

•
1 DL RF input port
•
1 auxiliary DL RF input port
•
1 UL RF output port
•
1 auxiliary UL RF output port
Note: nominal input levels required at RF ports is +10dBm (please refer to datasheet for
further information), as well as RF outputs may require a power adjustment to fi ll within the BTS
receiving range.
In order to fulfi l these requirements, external UL and DL attenuations may be required (see TBSI
module).

Optical ports

•
4 DL optical output ports (SC/APC)
•
4 UL optical input ports (SC/APC)
MN024-010
RF UL
Auxiliary
Port
Status and
Alarm LEDs
RF DL
Auxiliary
Port
UL Optical
Ports
Figure 4.3.1: The TFLN Master Optical Transceiver
RF UL
Main Port
RF DL
Main Port
DL Optical
Ports
TFLN
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