MULTI-CARRIERS TRANSMISSION – MODE:<n>ifb
This configuration allows to transmit IFB signals to one or more remote areas reducing the number of fiber modules
in the remote areas. On the remote area it is necessary to use a performing amplifier to amplify more carriers (as
the new MPA4 amplifier).
Above an example of 4-carriers IFB transmission.
In this configuration in the local area each transmitter is connected to a single Tx optical module and the MUX
combines the optical signal into one fiber. In the remote area one single optical RX module converts optical signal
into RF signal (no DEMUX is required). Next the RF signal is amplified with MPA4.
System setup and configuration:
LOCAL AREA
Connect the 4 transmitters to the 4 TX optical modules (RF input power approx. 0dBm)
Configure all TX opt. modules in MODE 4ifb, Gain = 0dB
Connect the single mode fiber SC/APC between local MFL and remote MFL
REMOTE AREA
Configure RX opt. module in MODE 4ifb
Configure the type of amplifier using the menu “OPT. CHANNEL > EXT_IFB amplifier”. Some Wisycom
amplifier are available in the menu (PAW, MPA4), otherwise select “Custom” and insert the amplifier gain in
the “Custom amplifer gain” parameter.
Select the RF output power after the amplifier using the RF Gain menu on the MFL (“OPT. CHANNEL > Gain”
o “SETUP”)
Example MODE 4ifb and MPA4
with gain = 0dB P
ampl
= 31.6mW
with gain = 5,5dB (max) P
ampl
= 112.2mW
NOTA: In <n>ifb MODE :
RF bar is disabled
If TX opt. module is set to OFF, no RF signal is converted but the optical laser is active and optical power
remain ON
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