RadioFrame Networks Inc RFU7 Manuel D’Utilisation

Choose one: 

located in the same 
building 

for an iSCII, connect the NCU to the SRI card on the back of 
the iSCII using the provided 1 meter, 50 ohm coaxial cable 
with two male BNC connectors: 
1.  Connect one end of the cable to the 5MHz/1PPS “IN” 

port on the back of the NCU (see the following 
illustration). 

2.  Connect the other end of the cable to either BNC 

“OUT” port of  the SRI slot on the back of the iSC.  

 

for an iSCIII, connect the NCU to the iSCIII using the 
provided 1 meter, 50 ohm coaxial cable with two male BNC 
connectors: 
3.  Connect one end of the cable to the 5MHz/1PPS “IN” 

port on the back of the NCU (see the following 
illustration). 

4.  Connect the other end of the cable to one of the three 

5MHz/1PPS “OUT” ports on the back of the iSC. The 
port will be determined by Nextel. 

located at different 
building sites  

the NCU derives its timing from a GPS receiver inside the 
NCU, which requires a connection to the building’s GPS 
antenna: 
1.  Insert the GPS antenna cable into the SMB port on the 

back of the NCU.