Rain Bird Gold LINK 900, Руководство пользователя, Страница: 7 / 35

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September 2015
c) Antenna Cables:
Cable selection is very important as too much signal loss can affect the overall communication
performance. In general, lower loss cables tend to be larger in diameter and less flexible. LMR
type cables are more weather resistant than RG type cables, but RG type cables tend to be much
more flexible. Here is a table showing examples of signal loss in dB based on the type of cable:
Only 50 Ohm cable may be used with LINK900 systems. Please note that the frequency being
used will also affect the cable loss. Normally, higher frequencies have a higher loss potential.
This table is for the 900MHz range of frequencies.
d) Antenna Cable Connectors
There are a wide variety of cable terminations available for 50 Ohm antenna cable. Four
different cable terminations are common in LINK900 systems: N, TNC, SMA and NMO. Other
terminations may also be encountered, especially if custom antennas or other devices are used.