9. Use UV-resistant cable ties to secure the surge protector assembly to the mast that
supports the antenna. To minimize moisture entry, point the end from which the ground
wire emerges down.
6.3 Troubleshooting the surge protector
The surge protector kit protects RF equipment by equalizing the potential difference between
the center pin of the coax cable and its shield. High currents can damage the center pin that
makes the connection between the cable connector and protector. The protector can withstand
1,000 events at 500 A, 10/100 microsecond, or five events at 20,000 A, 8/20 microsecond surge.
Expected life, without a surge strike, is 20 years. However, the actual Polyphaser lifespan varies
because lightning has different current waveforms and return strokes. Tower size and placement,
the ground conductivity, and number of storms per year also influence the life span.
At least every year, use the following procedure to check the surge protector:
1. Connect the Polyphaser protector to the antenna.
2. Connect the Polyphaser protector to the SWR meter.
3. Measure the SWR with the SWR meter. If the SWR value is greater than 2.5:1, replace the
surge protector to avoid antenna damage.
38485 4G/3G 9 dBi MIMO Cellular Antenna
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