Shure GLXD4R, Руководство пользователя, Страница: 17 / 33

Shure Incorporated
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2.4 GHz Spectrum Overview
GLX-D operates within the 2.4GHz ISM band which is utilized by Wi-Fi, Bluetooth, and other wireless devices. The benefit of
2.4GHz is that it’s a global band that can be used anywhere in the world, license free.
Overcoming the Challenges of 2.4 GHz
The challenge of 2.4 GHz is that Wi-Fi traffic can be unpredictable. GLX-D meets these challenges in the following ways:
Prioritizes and transmits on the best three frequencies per channel (choosing from a pool of six frequencies across the 2.4
GHz band)
Seamlessly moves away from interference to backup frequencies without audio interruption
Optional GLX-D Frequency Manager improves RF reliability for systems with more than two receivers
Continuously scans during usage to rank all frequencies (both current and backup frequencies)
Antenna mounting accessories and directional antennas (available separately) help reduce transmitter­to­antenna dis­
tance and connect to antenna splitter
Coexisting with Wi-Fi
If you plan to use Wi­Fi during a performance, turn on Wi­Fi devices prior to turning on GLX­D and scanning for the best chan­
nel. GLX­D detects and avoids other Wi­Fi traffic by scanning the entire 2.4 GHz environment and selecting the three best fre­
quencies to transmit on. This method avoids Wi-Fi signals and results in reliable performance for your GLX-D wireless system.
“Bursting” Wi­Fi is harder to detect as it is periodic; however, because GLX­D only repeats the most important information,
even bursts at very high levels don’t have an effect on your audio performance.
Challenging Wireless Environments
Some environments are more difficult than others for 2.4 GHz wireless system performance. Additionally, body absorption has
a greater impact in the 2.4 GHz spectrum compared to the UHF spectrum. The simplest solution in many cases is to reduce
transmitter­to­receiver distance by placing receivers on the stage with a clear line of sight. You can also mount antennas re­
motely using Shure directional antennas to reduce transmitter-to-antenna distance.
Challenging environments include:
Areas with few reflective surfaces such as:
Outdoors
Buildings with very high ceilings
Three or more GLXD4R receivers in use and not connected to a GLX-D Frequency Manager
Areas with a strong Wi-Fi presence
2.4 GHz systems from other manufacturers in use
Note: Unlike analog TV band wireless system which typically use the same type of transmissions across manufacturers, all 2.4 GHz wireless currently on the
market use different variations of wireless transmission. These differences make it more difficult to mix and match 2.4 GHz systems from multiple manufactur­
ers, as can be done with TV band wireless solutions.
Tips to Improve Wireless System Performance
If you encounter interference or dropouts, try the following suggestions:
Place receiver at least 3 meters (10 feet) away from Wi-Fi access points, computers, or other active 2.4 GHz sources.
Avoid heavy Wi-Fi traffic activities such as downloading large files or viewing a movie.
Turn on any Wi-Fi prior to turning on GLX-D and scanning for the best channel.