Specifications

63 Tempest®900 4-Channel Wireless Intercom System
Maximum Number of Collocated Systems
Factors that aect the maximum number of systems that may be collocated in any given locaon include:
• The existence and extent of harmful interference caused by in-band external radiators.
• Number of BaseStaons.
• Number of BeltStaons per BaseStaon.
• Whether or not synchronizaon is being employed.
• Physical locaon of BaseStaon antennas (either on BaseStaons or on Transceivers).
• Physical locaon of the BeltStaons.
• Specic hopping paerns selected.
• Environment (wide open, reecve, through walls…).
Favorable system condions include:
• Locaons with lile or no interference from other 900MHz devices will provide the best opportunity for a large
number of collocated systems.
• Proper use of synchronizaon resolves potenal desensing issues.
• Antennas of any parcular system should be separated from every other system’s antennas by at least 10 feet (3
meters) for best collocated system performance.
• BeltStaons operang at similar distances from their respecve BaseStaon antennas provide the best opportunity
for sasfactory performance of a large number of collocated systems.
• Network Number conguraon should be set up to ensure each system’s hopping paerns are congured properly.
See the secon on Network Number for more informaon.
• Environment can play a big role in RF system performance. Every locaon is dierent and has its own unique set
of challenges. Generally speaking, locaons with very long paths to very reecve surfaces tend to be the most
dicult for digital wireless communicaon systems due to the prevalence of inter-symbol interference.
With all factors listed above being favorable, three to ve Tempest systems (each with ve BeltStaons in Normal Mode),
may be collocated with minimal or no user-perceived impact on system range or performance. It is highly recommended
to contact your Tempest Applicaons Engineer for assistance when collocang more than three BaseStaons.
Adverse condions will limit the number, eecveness, and range of collocated systems in any given environment.