Installation and Operation Manual

NCL1100 Installation & Operation Manual
1990/07/21 – 11 –
4. If the incoming RF utilization is less than 44%, then the RF link portion of the system is
suspect. Focus your trouble-shooting on the coaxial cable, antenna, or interference.
5. If the RF link is not working, the coaxial cable is connected properly, and the antennae
are in unobstructed alignment with each other, then you many need a spectrum analyzer
(refer to Figure 8) to pinpoint interfering frequencies and take corrective action. You can,
however, move the antenna slightly in an alignment-type pattern, while it is on its mast, to
correct the problem; or use nearby objects to shield the antenna from the offending
frequency.
Figure 7: Display for Local and Remote Sites During Testing
Figure 8: Spectrum Analyzer Display of Interference