Clear-Com Tempest900 - Manual (Page 34)

28 Tempest®900 2-Channel Wireless Intercom System
Maximizing System Performance and Operational Range
Radio waves can be significantly affected by walls, windows, or other physical barriers. Concrete or metal walls can be
of particular concern. Some tinted windows are also significant barriers to RF. Always position antennas to minimize
interference from all barriers.
A human body can be a barrier to the radio signal, especially when operating near the limit of the signal’s range. If you
experience interference, turn the BeltStation toward the BaseStation antenna.
Electronic equipment can generate radio interference. Install the BaseStation antenna away from sources of electrical
interference. Be aware of the presence of nearby electronic equipment that may cause interference as you move about
while wearing the BeltStation.
Reflected RF signals, called multipath interference can cause intersymbol interference resulting in compromised audio.
Multipath interference should be suspected when audio is imperfect and there is no other obvious cause. Typically,
intersymbol interference requires a reflection path that is at least a few hundred feet. It is most likely to occur in a large
enclosed venue with highly reflective walls or ceiling. If intersymbol interference is suspected, relocate the BaseStation
antenna and/or try a directional antenna to help eliminate received reflected signals.
Line-of-sight operation between the BaseStation antenna and the BeltStations will always produce the maximum system
performance and operational range. Minimize obstructions between the BaseStation antenna and the BeltStations when
possible.
Use an optional directional antenna to improve system performance and operational range. A directional antenna focuses
the RF signal into a smaller area. When the BeltStation is located within this focused area of energy, it will have a more
powerful signal, which will improve range. Note: Directional antennas are currently not available for 900 MHz Tempest models.
Only use approved antennas. Unauthorized antennas may be illegal.