Fiber-Span LLC FS31X-19 用户手册

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Fiber Optic RF Repeater System 

 
The RF paths are defined as follows:    
 
Downlink – Originates at the FTU or and IHU, over fiber to the RRU to the RF Port.  
The Downlink generally is defined by the RF output power the RRU can deliver. 
 
Uplink – Originates at the RRU, over the fiber to the FTU or IHU to the RF Out Port.  
The Uplink is generally defined by RF input sensitivity. 
 

6.1 General 
 

 All unused RF Terminals must be terminated with a 50 Ohm load.  All unused Optical 
Terminals must be protected using dust cover cap.  When installing fiber optic cables, 
remove dust covers, clean optical connector with optical grade alcohol, align FC/APC 
connector KEY and hand tighten. Do not over tighten.  Keep fiber bend radiuses 
greater than 1.5 inches. 
 
 

6.2  Fiber Transceiver Unit (FTU) 
 

The Fiber Transceiver Unit (FTU) is a 19” standard 1U sub-rack.  The FTU requires 
AC Power (90 to 220 VAC, 50-60 Hz).  The AC interface is a standard IEC Power 
socket.  A US 120V AC Line Cord is supplied with each FTU.   
 
Mount Fiber Transceiver Unit away from excessive heat sources. Make all RF 
connections and terminate all unused RF connections before applying AC Power. 
User interface information can be found in attached outline drawing. 
 

 

Figure 6.  FTU Front View 

 

Figure 7.  FTU Rear View