How to improve the transmission effect and quality of wireless microphone system

How to combine the receiver with the antenna system to get the best transmission effect

The transmission effect of the wireless microphone system depends on the purpose of use, the most suitable receiver, the most suitable antenna system and the installation design to achieve the best reception quality. The following application examples illustrate the basic principles and provide users with reference.

1 Stand-alone single-channel and stand-alone multi-channel receivers are used indoors or outdoors for short distances

This is the most basic use case of a wireless microphone system. For family karaoke, small meeting rooms or small concerts, choose MIPRO's MR series receivers, using a pair of standard single-pole non-directional receiving antennas (Whip Antenna) Installed on the antenna input socket, straightened, fixed and locked. Although it is used for indoor or outdoor short-distance reception, the principle of maintaining stable reception and avoiding noise interference is also the principle. Since the metal chassis is equal to the component of the other half of the antenna's 1 / 4-wavelength ground terminal, the antenna and the receiver chassis should be kept as vertical as possible. . The receiving antenna should be as far away as possible from metal obstacles and noise interference sources in order to obtain the best receiving effect.

2 Single-machine single-channel, dual-channel and four-channel receivers are used indoors or outdoors for long-distance use

For stage performances or special environments that require long-distance use of the receiver, in addition to the selection of professional models with automatic channel selection, the installation of the antenna system needs more special attention. MIPRO's ACT series receivers will be equipped with a pair of standard coaxial non-directional receiving antennas (Coaxial Antenna) to provide basic applications. Before use, just install the equipped antenna directly on the antenna input socket, straighten and fix it. .

If you need to use a longer distance or use it in a fixed environment in the hall, to maintain good reception quality, you can use the AT-70 extended antenna to replace the coaxial antenna, the antenna is elevated or hung upside down on the ceiling, and then use the antenna coaxial cable directly Just connect to the antenna input socket of the receiver. As the receiving antenna is set higher from the ground, the farther the receiving distance is, but the signal transmission loss will occur because the coaxial cable is pulled too far, so the diameter of the coaxial cable must be thickened or the AT-70B antenna wave filter must be installed to Make up for cable transmission losses. As for the power supply of the strong wave device, it can be directly supplied by the antenna base with the antenna bias.

When used in a long-distance environment with a lot of interference signals, use the AT-90T logarithmic directional receiving antenna instead of AT-70, point the antenna in the direction of the wireless microphone, and fix it vertically with a tripod. High, you can get better reception. If you need a longer cable, you can use the AT-90R active logarithmic directional receiving antenna to replace the AT-90T, because the built-in strong wave can get enough gain to make up for the loss of cable transmission.

When more than three units are put together for multi-channel reception, an AD-707 must be added. Connect the antenna of each receiver to the distributor and then share a pair of built-in antennas to receive or externally extend the antenna to increase the receiving distance and Receive effects.

3 For more than four channels, use it indoors or outdoors for long distance

If four ACT series single-channel receivers are used in combination, the AD-707 antenna splitter must be installed, and the antenna of each receiver should be connected to the splitter to share a pair of built-in coaxial antennas for receiving, or external extension Antenna to increase the receiving distance and receiving effect.

Using MIPRO an ACT-74P professional or ACT-74 practical four-channel receiver is the most sensible design, which is the most space-saving and the most economical, and because the receiver has a dedicated active antenna splitter, There is no need to add an external antenna distributor, as long as the above single receiver antenna installation method is adopted, the best receiving effect can be obtained.

4 Within 16 channels at the same time for indoor or outdoor long-distance use

When using up to 16 channels at the same time in professional stage performances, fixed hall environment and long-distance complex environment, use MIPRO four ACT-74P professional four-channel receivers, with an AD-707 antenna distributor, and then connect A pair of AT-90T logarithmic directional antennas, or connect to AT-90R active logarithmic directional antennas for long-distance use, forming a set of 16 channels with the most perfect function, the most saving installation space, the simplest installation and the most economical gold combination. Because AT-90T and AT-90R have high-sensitivity receiving gain for signals in the receiving frequency band and direction of use, they are distributed to the antenna input of each receiver through AD-707, and then assigned by each receiver. The receiver distributes the signal received by the antenna to each channel without loss, so that each channel can obtain the best reception effect of the noise ratio without interference and the most stable conditions.

5 Design principles for the best transmission effect of a multi-channel wireless microphone system

Select the model with the largest number of channels built into each receiver, and an active antenna splitter design (such as: ACT-74P / 74) is required in the machine to maintain the receiving sensitivity without attenuation.

When using an extended antenna for more than two receivers, it is best to install an antenna splitter to integrate the antenna of each receiver.

For more than three receivers, an antenna splitter must be installed to integrate each receiver to use a pair of coaxial antennas built in the splitter. If a pair of extended antenna systems are used to replace the built-in coaxial antennas, the reception can be increased. Distance and improve reception quality.

According to the desired distance of the wireless microphone system, select the antenna system according to the calculation method of "how to design the antenna system of the receiver".

In a multi-channel system using more than two or four antenna distributors, you can use another antenna distributor to connect the antenna systems of these antenna distributors in series, but connecting more than three antenna distributors in series will gradually make the receiver The effect is degraded. Therefore, MIPRO's current receivers have a maximum of four channels. If the system exceeds 64 channels, it is best to combine another system to maintain the best reception.

Selecting the directional antenna system (AT-90R) can provide better reception quality for the received signals in the direction of use in the environment with more complex signal interference. The choice of antenna system is closely related to the quality of signal transmission. You can refer to the following design description of the antenna system.


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