• 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 sep-
arately) help reduce transmitter-to-antenna distance and connect to an-
tenna splitter
Coexisting with Wi-Fi
If you plan to use Wi-Fi during a performance, turn on Wi-Fi devices prior to
turning on GLX-D and scanning for the best channel. GLX-D detects and
avoids other Wi-Fi traffic by scanning the entire 2.4 GHz environment and
selecting the three best frequencies to transmit on. This method avoids Wi-
Fi signals and results in reliable performance for your GLX-D wireless system.
“Bursting” Wi-Fi is harder to detect as it is periodic; however, because GLX-
D 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 transmitter-to-receiver distance by placing receivers on
the stage with a clear line of sight. You can also mount antennas remotely
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 differ-
ences make it more difficult to mix and match 2.4 GHz systems from multiple
manufacturers, 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:
1. 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.
2. Reduce transmitter-to-receiver distance by placing receivers on stage or above the audience with a clear line of sight to the transmitter.
⁃ Move receiver to the top of the equipment rack for a clear line of sight.
⁃ Mount antennas remotely to place closer to transmitters and improve RF reliability if receivers cannot be moved closer.
⁃ Make sure people do not block the line of sight between receiver and transmitter.
Shure IncorporatedGLXD4R Half-Rack Wireless Receiver
2017/05/1810/20
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