Wireless microphone provides us with great convenience, move free, the use is extremely simple. But they are not without disadvantages, it will discuss how to correctly use the wireless microphone, thereby maximizing the foster strengths and circumvent weaknesses.
On the frequency
A complete set of wireless system consists of a transmitter and a receiver, they must be set to the same frequency.
The United States Federal Communications Commission ( FCC ) on the band for the allocation of.
In the United States, wireless audio system used for the band:
Low frequency ( VHF 49-108 MHz )
High frequency ( VHF 169-216 MHz )
Low frequency ( UHF 450-806 MHz )
High frequency ( UHF 900-952 MHz )
UHF system than VHF system with better performance.
These radio frequency has also been used in television, communication equipment and other areas of the wireless microphone system.
Because the radio frequency sharing reason, in the same region of the other people use frequency may be like you.
The government also provides some other technical indicators, including the maximum transmission power limit.
If the two transmitters on the same frequency, it will create interference, wireless system can not use. The same time, two transmitters can use only one receiver.
At the receiver, improve noise parameters can improve the interference protection, but will reduce the scope of use. The squelch to reliably to minimize noise position.
Close the unwanted electronic equipment, especially computer, CD players and other digital devices. These are the common wireless interference source, especially when they are near the receiver.
If you use a computer or digital equipment, ensure that the distance between receiver and antenna at least 3 feet.
In actual use, the wireless system maximum working range is not the same, if it is in a crowded room, may be only 100 feet, while in the empty room, can reach 1000 feet.
Diversity the working range of the system is almost certain to be better than diversity system.
The receiver must have one to two external antenna, and the antenna and transmitter should have open space transmission.
The new user's tips
1, tell the host, recording engineer how to control the microphone switch. The transmitter on the switch stick out, so that they would not meet.
2, consider prior good host in the face of the stage or in the audience some person, his head is most likely to which direction. If not clipped the microphone to tie shirt or intermediate, then don't in his / her most likely towards the side of the.
In 3, the redundant lines must be reliably fixed, so as to avoid wound in the arm of the chair or affect the surface light. The use of small collar clip or " hairpin " can help users to line is fixed at the desired position.
4, if possible, a transmitter / waist should be fixed on the belt or belt of the host -- can't throw in the pocket. Because you don't know what is left in your pocket. If the host with his hands in his pockets, may be inadvertently put the wires or touch switch.
In 5, a wireless microphone of one of the most important advantage is that it can move freely, but not familiar with the user may move too much, to the front of the speaker to produce feedback problem. Need to remind all users to avoid close to the loudspeaker.
6, if the host must on the stage or in the studio to turn, or in several places, then tell if he met signal loss of the need to do something. Even the most advanced wireless microphone will encounter the loss of signal status. Step aside, even a little offset, may solve the problem of loss, host alone could bring the interrupt is reduced to a minimum, to continue his show.
On the battery
1, some radio problems, including completely without signal, work is smaller, sound distortion and interference, usually due to transmitter battery low or no electricity caused by.
2, to use the new high quality alkaline battery. Other types of batteries ( such as zinc carbon battery service life shorter ).
3, if the battery has any questions, then change it. Never put the old battery mix.
In 4, the charging battery:
If you must use rechargeable batteries, it is more effective for nickel-hydrogen batteries, lithium ion batteries or lithium polymer batteries, do not use a nickel-cadmium battery.
Note the actual voltage. Some shows for 9 volt rechargeable battery may be only 7.2 or 8.4 volts -- or worse 9.6 volt.
