Vega U2020, Руководство пользователя

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generate substantial amounts of broadband noise. When this situation exists, move the
receiver antennas away from these sources of RF noise to minimize the effect of this
interference. Fortunately, this type of problem is surprisingly rare.
A more serious problem is selection of wireless-microphone operating frequencies which are
inherently subject to interference due to intermodulation. Fortunately, a proper initial
selection or changing frequencies will usually correct any such problem.
Microphone Problems
Almost all electret microphones are sensitive to RF energy and require special precautions
to operate properly with wireless transmitters. If the sound quality of a microphone changes
drastically when its position with respect to the transmitter changes, it is likely that RF
susceptibility is the cause. Contact the Vega factory or your sales representative if assistance
is required. Lavalier mics purchased from Vega are specially assembled with added
components to avoid this problem.
The wires in lavalier electret microphone cables are usually very small. After a period of
heavy use, the conductors may fray, resulting in intermittent failure or severe noise. The
wire also may break. It is advisable to have a spare microphone available in good working
condition (it does not need to be a high-quality unit). A spare microphone enables easy
localizing of problems due to bad microphone cables by merely substituting the spare for
the suspected unit.
Wireless Microphone System 17