User's Manual

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Advantages of the Digital Wireless System 1/2

Not only can the digital wireless system reduce the influence of noise, it can also maintain clear

sound quality by means of digital processing. In addition to this, there are various advantages

unique to the digital wireless system.

» Use of Multiple Channels in the Same Area

» Interference Noise Muting

Since the wireless microphone makes itself a source of noise, when using multiple channels in the same

area, channels must be arranged to avoid radio interference due to intermodulation interference. In the case

of the analog wireless system, the most efficient channel arrangement is as shown in the [Analog] figure

below if the intermodulation interference of radio waves is taken into consideration. In this arrangement, the

simultaneous use of 6 channels is all it can handle per 4 MHz band.

Analog systems are prone to generation of strange noises when exposed to radio interference. Conversely,

radio interference is muted in digital systems, so strange noises are not produced.

In the digital wireless system, however, since one of its features is being immune to the influence of noise,

even when the intermodulation interference occurs, individual channels are less likely to be affected by it. As

a result, equal-interval channel arrangements such as shown in the [Digital] figure below becomes possible,

allowing up to 10 channels to be used simultaneously per 4 MHz band.

806.125

806.250

806.500

806.750

807.000

807.250

807.500

807.750

808.000

808.250

808.500

808.750

809.000

809.250

809.500

809.750

810.000

(MHz)

Analog

Minimum interval

250 kHz

Occupied bandwidth

110 kHz

6 channels/4 MHz (channel arrangement taking intermodulation

interference into consideration)

* This is an example.

Digital