Spread Spectrum Wireless Data Transceiver User Manual
Choosing a Location for the Transceivers
Placement of the FreeWave transceiver is likely to have a significant impact on its performance. Height is
key. In general, FreeWave units with a higher antenna placement will have a better communication link.
In practice, the transceiver should be placed away from computers, telephones, answering machines and
other similar equipment. The 6-foot RS232 cable included with the transceiver usually provides ample
distance for placement away from other equipment. To improve the data link, FreeWave Technologies
offers directional and omni directional antennas with cable lengths ranging from 3 to 200 feet. When using
an external antenna, placement of that antenna is critical to a solid data link. Other antennas in close
proximity are a potential source of interference; use the Radio Statistics to help identify potential
problems. It is also possible that an adjustment as little as 2 feet in antenna placement can solve noise
problems. In extreme cases, such as when the transceiver is located close to Pager or Cellular
Telephone transmission towers, the standard and cavity band pass filters that FreeWave offers can
reduce the out-of-band noise.
FreeWave also offers a waterproof version of the 900MHz transceivers. This model can be placed
outdoors without additional weather protection. The waterproof enclosure still requires an external
antenna and includes a 6-foot data and power pigtail cable.
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