O P E R A T I N G M A N U A L
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Introduction
What makes X-System so different?
CoachComm has been building and providing wired and wireless systems for over 25 years to supply quality
communications to D-1 teams nationwide. Therefore, CoachComm’s knowledge of wireless technology in the D-1 football
arena is vast, and our experience is deep. When it came time to build the next generation of equipment to service that
industry—CoachComm was up to the challenge.
X-System makes use of the newest available communications technology and meets our customers’ demands for more
users, better audio, and future-based features.
X-System is the first wireless intercom system to innovate the following unique features:
• Better Frequency-Hopping Spread Spectrum performance in domes
• Enhanced 900MHz and 2.4GHz band wireless performance
• X-Ware touchscreen user interface for greater visibility and control of the system
• State-of-the-art rugged and stable Sideline Cart design
• Better 7k audio quality
These features come together to form a powerful product called X-System. X-System, together with enhanced tools for the
wired portion of the system, makes for an incredibly robust, easy to operate system.
Frequency Considerations
900MHz and 2.4GHz
CoachComm designed the new X-System to operate seamlessly in both the 900MHz and the 2.4GHz frequency bands. This
allows multiple devices to operate within the bands with minimal interference or reduction of range and performance.
The 2.4GHz ISM frequency band is a globally accepted portion of the RF spectrum that is available for unlicensed use
virtually anywhere worldwide with no frequency coordination. In the United States, the 2.4GHz band is 2400–2483.5 MHz.
X-System utilizes up to 83 MHz of this spectrum from 2400–2483 MHz.
The 900MHz ISM frequency band is a portion of the RF spectrum available for unlicensed use in North America and other
various locations with no frequency coordination. In North America the 900MHz band is 902–928 MHz. X-System utilizes up
to 26 MHz of this spectrum.
Frequency-Hopping Spread Spectrum
Frequency-Hopping Spread Spectrum (FHSS) is a means of RF transmission. In FHSS, the signal hops to various
frequencies—hence the name. In doing so, it spreads the data (voice in our case) across a wide area of the RF spectrum.
Devices such as those in X-System collide constantly with other devices in that frequency spectrum and must have
mechanisms built into their protocol to allow for data redundancy to provide acceptable user performance.
