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Advanced Applications
5•2
A similar circumstance occurs with radios, and since the long distance transmitter is
incapable of increasing its power output, it is possible for a very near transmitter may
interfere with it.
In the real world, this is rarely an unmanageable problem. You should avoid being closer
than 3 feet to a receiver that is not on your channel if the intended transmitter is more
than 50 feet from this receiver. If this is a regular requirement, you will need to remote
your antennas.
Cell Phone Interference
The use of cell phones should be avoided when very close to XD-V70 transmitters. They
will not cause audio interference in the RF section of XD-V wireless systems, but these
cell phones emit a signal that can penetrate input cables and mic elements themselves,
thereby creating audio that becomes part of your signal. The result will leave most users
with familiar “brap-ap-ap” buzz. The only certain cure is to leave them completely shut
off or to move them sufficiently away from your XD-V systems.
Batteries
Line 6 2.4GHz wireless transmitters have a circuit that measures the actual real-time voltage
of the installed batteries and transmits that data to the battery meters in the receivers.
The battery meters are very accurate when they have been running continuously from
the time new batteries were installed in the transmitter and the transmitter power has
not been cycled on and off. However, due to the chemical nature of Alkaline batteries,
when they have been shut off the voltage begins to “rebound “ and the voltage actually
increases compared to its value at shutoff. This rebound effect does not last long and the
voltage reverts to true self over twenty minutes or so. For this reason when you first turn
on a Transmitter that has been run but allowed to rest, the meter will give a higher reading
that quickly falls over the first few minutes. This is normal behavior for Alkaline batteries.
Rechargeable batteries may be used in XD-V70 transmitters. NiMH are recommended
in the 2400-2800 mAh range. It is essential that the charger and charge rate correspond
to the actual batteries used. Make certain that any batteries selected fit properly in the
transmitters as these batteries vary in maximum outside diameter. Do not charge these
batteries inside XD-V70 transmitters. The battery meters in the XD-V70 units are
calibrated for Alkaline battery discharge rates and will not be as accurate when using
rechargeable batteries. Carbon-zinc batteries are not recommended.