User's Manual

Remote Fiber Node (RFN) User Manual

Fiber Transceiver Unit – Ethernet (FTU-E) houses the media converter.

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Radio Interface System (RIS) houses all the RF devices that condition, filter, rssi and control

gain that is required between the BTS and FTU-RF, in part because an ideal RF level into FTU

is 0 dBm and levels from BTS are considerably higher up to 30 dBm. As planned, based on the

service group, configuration for simplex, duplex and full duplex or combination of them are

arranged in the RIS.

Fibers interconnecting the FTU-RF, OMU and RFN are 9/125 um single mode.

Fiber medium operational range is from 0 to 8 dBo optical loss.

Figure 9

7.4. Optics

Behaving identical all 3 internal fiber optic transmitters (FOTX) that converts the electrical

input into output modulated light using a cooled distributed feedback (DFB) laser.

Figure 11 displays 3 optical links that represent the Service Groups for the downlink and

another alike setup makes up the uplink.

Figure 10