如何选择最先进的无线话筒（How to choose the most advanced wireless microphone）.doc

如何选择最先进的无线话筒(How to choose the most advanced wireless microphone)
How to choose the most advanced wireless microphone
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One. Overview
Because of modern munications technology, to enhance the quality and function of the wireless microphone products, to mature and practical areas and firms' increasing, but also because of the petition and declining consumer trigger regarding this product has hobbies and widely used. According to the sales in the professional manufacture of wireless microphone eight years of experience in providing relevant technical elements of the latest products in the design, so that consumers before purchase this product, can determine how to choose a good product value, but also provide reference on advanced products manufacturers, sales of consumer satisfaction.
Two. Understand the types of wireless microphones
Before buying a product, first of all, the product category has a basic concept to choose the type of aircraft for their own needs. The categories of wireless microphones can be distinguished into many different types according to different definitions.
1. distinguish between transmitted frequencies:
A. FM wireless microphone: commonly known as FM refers to the FM 88-108MHz international FM broadcast band. Early consumption wireless microphone is to use FM radio to receive, the system is simple, low cost, but because of the use effect, can meet the professional quality requirements, can only e children or students toys.
B. VHF: wireless microphone is divided into low and high frequency ranges of two types, the former using the VHF50MHz band, with low frequency, antenna length is too long, but also the most vulnerable to a variety of electrical clutter, so this type of product has been replaced by high frequency and gradually disappeared from the market. The use of the VHF200MHz band, due to high frequency of use, the antenna is short, even can be desig