OPW M00-20-7074, Руководство пользователя

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Figure 2-3 Omni-Directional and Directional Antenna Signal Patterns
NOTE:
Notice how, like the flashlight, the beam width is decreased as gain is increased.
Antenna Installation Considerations
When mounting an antenna, care should be taken to make sure it is as far away from metal objects as
possible. If nearby metal gets too close to an antenna, it has the potential to interfere with the way the
antenna radiates and may cause some undesirable results.
In some cases, a cable must be used to connect an antenna to a transmitter or receiver. All RF cables add
some loss to the system. For any given cable, the longer the cable the more signal will be lost over that cable.
Because of this the length of the cable should be kept as short as possible. Often a longer serial cable can be
used to minimize the length of the antenna cable.
TIP:
If you have two (2) wireless modems, you do not have to configure the modems and you
can proceed with the installation instructions. The modems are pre-configured for use with one
(1) or two (2) modems.
NOTE:
If you have three or more wireless modems, please refer to
"FSC to Multiple FIT
Operation (3 or More Wireless Modems)" on page 24 for setting up multiple modems.
Doc. No.: M00-20-7074 Rev.: 6
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