User's Manual

Installing the RadioFrame System
24
Figure 14 When connecting the RFS to an iSCII, an Ethernet Media
Converter is required to connect the NCU to the iSCII.
Connecting the NCU to an iSCIII
1 Insert one end of the provided 50 ohm coaxial cable (with two male BNC
connectors) into one of the three 10Base2 ports on the back of the iSCIII (port to
be determined by Nextel).
2 Insert the other end of the cable into the 5MHz/1PPS IN port (BNC) on the back
of the NCU.
Connect the NCU to the Timing Source
If the NCU and iSC are mounted in the same location (the same building site),
the iSC will provide timing to the NCU. However, if the NCU and iSC are
located at different sites, the NCU derives its timing from the GPS antenna.