Shure M367 Especificações descarregar pdf (Página 14)

The low-band VHF (49-72 MHz) range is utilized by radio-controlled toys,

cordless telephones, baby room monitors, and other consumer products.

Wireless microphone systems on these frequencies — particularly 49 MHz

— are likely to pick up interference from some of those items. While low-

band VHF systems are typically very inexpensive, their performance is

generally acceptable only for home video recording use.

The high-band VHF (169-216 MHz) range is the most widely used for

professional applications, and quality systems are available at a variety of

prices. This region is the same one in which VHF television stations

(channels 7-13) broadcast, so it is important to be aware of which stations

are in the geographic area where the wireless system is to be used. In

Chicago, for instance, there are TV stations on channels 7, 9, and 11, so

wireless systems operating in channels 8, 10, 12, or 13 may be used.

Manufacturers of wireless systems can help you select the optimal

frequencies for use in your area, considering other units already in use at

your location and the number of systems to be used.

If you intend to use your VHF wireless microphone system in various parts

of the country, you might choose one of the so-called “traveling”

frequencies. These are frequencies in the 169-172 MHz range which are just

below channel 7, and therefore not subject to interference from TV stations.

Traveling frequencies are by far the most crowded, however, and in some

areas they are used by navigation buoys or hydroelectric equipment to

broadcast control signals which may interfere with your wireless mic. Keep

this in mind when using wireless microphones near coastal areas or dams.

The UHF frequency range has become more popular as congestion in the

VHF band has increased. Since the UHF band is generally less crowded

than VHF, there is less chance of encountering interference from another

user on the same frequency. There is no inherent difference in sound quality

Audio chain incorporating a wireless microphone system

Wireless

Microphone

Transmitter

Camcorder with Receiver

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Shure M367 Especificações Página 14