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Antenna Placement
Use the following guidelines when mounting antennas:
• Antennas and receivers must be from the same band.
• Mount antennas at least four feet apart.
• Position antennas so there is nothing obstructing a line of sight to the
transmitter (including the audience).
• Keep antennas away from large metal objects.
Important: Always perform a "walk around" test to verify coverage before
using a wireless system during a speech or performance. Experiment
with antenna placement to find the optimum location. If necessary, mark
"trouble spots" and ask presenters or performers to avoid those areas.
Setting Gain
The gain setting should only be used to compensate for the calculated
cable signal loss. Additional signal gain does not mean better RF perfor-
mance. Too much gain actually reduces reception range and the number
of available channels. This is because Shure receivers are optimized to
deliver the best performance when the sum of signal gain and cable loss
equals 0 dB. Additional gain just amplifies everything in the RF range—in-
cluding interference and ambient RF noise. It cannot selectively increase
the signal from the transmitter.
• Use the lowest gain setting necessary to achieve good reception of the
transmitter RF signal, as indicated on the receiver’s RF LED or meter.
• Only increase the gain setting to compensate for the calculated cable
loss.
• The −6 dB gain setting can be useful for applications with short cable
runs (25 feet or less) and where the distance between the transmitter
and antenna is less than 100 feet.
• Reduce gain if the antenna RF Overload LED illuminates—the signal is
strong enough, so gain is not needed.
Recommend Gain Settings
Use the following chart as a guideline for setting gain based on cable type
where the distance from the antenna to the transmitter is greater than 100
feet.
NOTE: For installations where the antenna is less than 75 feet from the
transmitter, lower the gain setting one step.
Cable Length Gain Setting (based on cable type)
RG58* RG8X RG213/
RG8
Low-loss
RG8/
RG213**
10' (3 m) 0 0 0 0
25' (8 m) +6* 0 0 0
50' (15 m) * +6 +6 0
100' (30 m) * +12 +6 +6
* RG58 cable has high signal loss and is not recommended for cable
runs greater than 10 feet
** Low-loss RG8/RG213 cables include Times Microwave Systems
LMR400 and Belden 9913 or 7810A
Find More Information Online
For setup tips and more information on wireless accessories, visit http://
www.shure.com/WirelessAccessoryWizard