Linking Multiple Transmitters To A Receiver; Tips And Methods To Improve Wireless System Performance - Shure GLXD6 Instructions Manual

GLXD6 Guitar Pedal Receiver with Integrated Tuner
2. Press and hold the link button on the receiver: The blue rf LED will flash,
and then remain on when the link has been established.

Linking Multiple Transmitters to a Receiver

Link multiple transmitters to the same receiver to allow for instrument changes
during a performance. Only one transmitter can be active at a time, otherwise
the signals will interfere with each other.
After linking the transmitters, gain settings can be set and stored indepen-
dently for each transmitter.
Important! Do not turn on and operate both linked transmitters at any time.
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 2.4GHz
The challenge of 2.4GHz is that Wi-Fi traffic can be unpredictable. GLX-D
meets these challenges in the following ways:
• Prioritizes and transmits on the best 3 frequencies per channel (choosing
from a pool of 6 frequencies across the 2.4GHz band)
• Repeats the most important information such that one frequency can be
taken out entirely without audio interruption
• Continuously scans during usage to rank all frequencies (both current
and backup frequencies)
• Seamlessly moves away from interference to backup frequencies without
audio interruption
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 2.4GHz environment and
selecting the 3 best frequencies to transmit on. The result of this is reliable
performance for your GLX-D wireless system as well as avoiding Wi-Fi
transmissions which may be important as well.

Tips and Methods to Improve Wireless System Performance

If you encounter interference or dropouts, try the following suggestions:
• Scan for the best available channel (press the channel button)
• Reduce transmitter to receiver distance - for example, place receivers
on stage with a line of sight to the receiver.
• Change the group for all GLX-D systems:
⁃ Single-Chanel System: use Group 4, which is optimized for single-
channel use
⁃ Multi-Channel System: use Group 2, which is the most robust wireless
group
• Keep transmitters more than 2 meters (6 feet) apart
Note: GLX-D transmitters closer than 6 inches (15 cm) to other non-GLX-
D transmitters may cause audible noise in that transmitter
• Move receiver further away from Wi-Fi access points, computers, or
other active 2.4 GHz sources.
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3. Test the audio to verify the link and adjust the gain if necessary.
Turn off both transmitters before beginning.
1. Press the group button to select a group. The receiver automatically
scans the selected group to find the best available channel.
2. Turn on transmitter 1 and link it to the receiver. Adjust the gain, and then
turn off the transmitter.
3. Turn on transmitter 2 and link it to the receiver. Adjust the gain, and then
turn off the transmitter.
"Bursting" Wi-Fi is harder to detect as it is periodic; however, because GLX-
D 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 the transmitter to receiver distance such as placing
the receivers on the stage with a clear line of sight.
Challenging environments include:
• Areas with few reflective surfaces such as:
⁃ Outdoors
⁃ Buildings with very high ceilings
• 3 or more GLX-D receivers in use
• Strong Wi-Fi presence
• Competitive 2.4 GHz systems in use
Note: Unlike analog TV band wireless which typically uses the same type of
transmissions across manufacturers, all 2.4GHz wireless currently on the
market use different variations of wireless transmission. These differences
make it more difficult to mix and match 2.4 GHz from multiple manufacturers
successfully, as can be done with TV band wireless solutions.
• Disable non-critical Wi-Fi on computers, cell phones, and other portable
devices
⁃ If you plan to use Wi-Fi during a performance, turn on Wi-Fi prior to
turning on GLX-D and scanning for the best channel.
• Avoid heavy Wi-Fi traffic activities such as downloading large files or
viewing a movie.
• Avoid placing transmitter and receiver where metal or other dense mate-
rials may be present
• During sound check, mark trouble spots and ask presenters or performers
to avoid those areas
• If there is a known strong source of Wi-Fi and you specifically want to
use frequencies within that Wi-Fi channel, use the following
Group/Channel of GLX-D (best option listed first):
⁃ Wi-Fi 1: Group 3/Channel 8, Group 3/Channel 4
⁃ Wi-Fi 6: Group 3/Channel 7, Group 3/Channel 5
⁃ Wi-Fi 11: Group 3/Channel 2, Group 3/Channel 1
Shure Incorporated
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