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GLXD4
Wireless Receivers
For ease of set up, frequencies are divided into groups to best match the
channel requirements for your system.
Select the group by determining the total number of receivers in your system
(channel count). All receivers in the system must be set to the same group.
Channel
Number of
Count
Group
Backup
(Number of
Frequencies
Receivers)
1
Up to 4
3
2
Up to 5*
3
3
Up to 8*
0
4
1
27
*Environmentally dependent, 4 systems typical
See "Tips to Improve Wireless System Performance" section for additional
information.
Manually Linking a Transmitter to a Receiver
Use the manual linking option to change the transmitter linked to a receiver.
A common use for manual linking is changing the linked transmitter from a
bodypack type to a handheld type.
1. Turn on the transmitter: Within 5 seconds, press and hold the LINK button
until the transmitter LED begins to flash green.
Combo Systems
A combo system is created by linking two transmitters to a single receiver.
Only one transmitter can be active at a time to prevent cross interference.
Gain settings for each transmitter can be independently set and stored when
the transmitter is active.
Important! Do not turn on and operate both linked transmitters at any time.
Turn off both transmitters before beginning.
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)
2017/10/23
Notes
Initial factory setting.
Best multi-channel group if you
experience interference.
For large multi-channel systems.
Only use Group 3 in controlled Wi-Fi
environments because there are no
backup frequencies to avoid
interference.
Best single-channel group if you
experience interference.
Setting Up Receivers and Transmitters
Note: Before beginning, turn off all receivers and transmitters. Turn on and
set up each receiver/transmitter pair individually to prevent cross-linking.
1. Turn on the first receiver.
2. Press and hold the group button to select a group (if necessary) or if the
group is already set, press the channel button to scan for the best avail-
able channel.
3. Turn on the first transmitter. The blue rf LED will illuminate when a link
is established.
Repeat steps 1-3 for each additional receiver and transmitter. Remember to
set each receiver to the same group.
audio
Note: Dashes appearing on the group and channel display during a channel
scan indicate that frequencies are not available in the selected group. Choose
a group that supports more receivers and repeat the set up steps.
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.
3. Test the audio to verify the link and adjust the gain if necessary.
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.
•
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.
"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.
Shure Incorporated
mute
rf
9/19
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