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Talking about the application and positioning of wireless microphones

2021-03-07 70
Transmitter to receiver channel
The signal from the transmitter is not only radiated in the direct path, but radiated in all directions. This will cause the walls, floors, and ceilings to reflect sound, and the reflected signal will overlap with the signal sent directly.
For a single-antenna receiver, the so-called non-diversity system, the direct signal and reflected signal it receives usually subtract each other, resulting in sound leakage. A diversity receiver with two antennas can better cope with long-distance and channel-intensive applications. It can have a reliable signal setting even when the receiver and transmitter cannot be directly transmitted.

wireless microphone


Talking about the application and positioning of wireless microphones

 
Receiver and antenna placement
Place the receiver correctly:
The receiver is not only subject to interference from external radio frequency sources. Therefore, if possible, keep the receiver away from CD/DAT/MD players, computers/notebooks, and special effects devices at the same time, even a few feet (or a few cameras).
Place the antenna correctly:
Ideally, the antenna should be placed above the audience or other obstacles so that the transmitter and receiver can "see" each other. If the receiver is installed on a rack, the antenna must be placed on the front panel or protrude from the top of the rack. The antenna of the diversity receiver should be at a 45-degree angle to maximize the distance between the antenna tip. To obtain the best diversity effect, the antenna spacing should reach 40 cm (one wavelength), less than this distance will affect the effect.
Use of antenna splitter
If you need to use multiple wireless systems at the same time and need to move from one location to another, it is more convenient to install the receiver in a rack. But this will reduce the performance of the wireless system because the antennas are too close to each other.
More advanced wireless systems use detachable antennas so that antenna splitters can be used. The distributor provides a signal to a pair of "main" antennas, thereby serving all receivers and improving the reliability of the radio frequency. If four or more receivers are installed in the rack at the same time, we recommend using an antenna splitter to greatly improve performance.
power supply
Unlike most wired microphones, all wireless transmitters require batteries. Therefore, the battery is very important and requires constant replacement and regular inspection.
Rechargeable batteries can be used. The higher the charge of the rechargeable battery, the longer the battery life.
The 9-volt alkaline battery has twice the service life. If the use time is less than 3 hours, you can also use a 9-volt rechargeable battery.
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