Shure GLXD4 Instrucciones De Uso página 12

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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 2.4GHz
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
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)
• Reposition the receiver so there is nothing obstructing a line of sight
to the transmitter (including the audience)
• Change all GLX-D systems to Group 2, which is the most robust
wireless group
• Keep the transmitter and receiver more than 2 meters (6 feet) apart
• Keep transmitter to receiver distance within 60 meters (200 feet) -
place receivers on-stage within line of sight if possible
• Remove or relocate nearby sources of wireless interference, such as
Wi-Fi devices or hotspots, cell phones, two-way radios, computers,
media players, and digital signal processors
• Disable non-essential Wi-Fi/bluetooth devices and avoid heavy Wi-Fi
traffic activities such as downloading large files or viewing a movie.
2.4 GHz Frequency Tables
The following tables list receiver channels, frequencies, and latency for each group:
Group 1: Channels 1-4 (latency = 4.0 ms)
Group/Channel
Frequencies
1/1
2424 2425 2442
2443 2462 2464
1/2
2418 2419 2448
2450 2469 2471
1/3
2411 2413 2430
2431 2476 2477
1/4
2405 2406 2436
2437 2455 2457
12
Coexisting with Wi-Fi
GLX-D avoids continuous 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.
• Locate GLX-D receivers away from non-Shure 2.4 GHz receivers
• Avoid placing transmitter and receiver where metal or other dense
materials may be present
• Move the receiver to the top of the equipment rack
• Recharge or replace the transmitter battery
• Keep transmitters more than 2 meters (6 feet) apart - this is less
critical at shorter receiver to transmitter distances
Note: If transmitters are within 6 inches of non-GLXD transmitters or
microphone cartridges, audible noise is possible.
• During sound check, mark trouble spots and ask presenters or
performers to avoid those areas
Group 2: Channels 1-5 (latency = 7.3 ms)
Group/Channel
Frequencies
2/1
2423 2424 2443
2444 2473 2474
2/2
2404 2405 2426
2427 2456 2457
2/3
2410 2411 2431
2432 2448 2449
2/4
2417 2418 2451
2452 2468 2469
2/5
2437 2438 2462
2463 2477 2478
Challenging Wireless
Environments
Some environments are more difficult
than others for 2.4 GHz wireless system
performance. 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:
• Outdoors
• Very high ceilings
• 3 or more GLX-D receivers in use
• Strong Wi-Fi presence
• Non-Shure 2.4 GHz systems in use
Group 3: Channels 1-8 (latency = 7.3 ms)
Group/Channel
Frequencies
3/1
2415 2416 2443
3/2
2422 2423 2439
3/3
2426 2427 2457
3/4
2447 2448 2468
3/5
2409 2451 2452
3/6
2431 2462 2463
3/7
2404 2473 2474
3/8
2435 2477 2478

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