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1.How to improve the discontinuous sound or noise of wireless microphone?
When the antenna receives, despite of receiving direct wave of transmission signal, it will also receive the indirect wave of surrounding sound. As phases opposite, signal will then be mutually counterbalanced. When the signal of antenna is lower than the receiver mute action point, it is called a “coffin corner”, and then the output of receiver will experience episodic discontinuous sound or noise. The signal closer the mute action point, the greater the noise.
2.(True-Diversity) What are the principles and the improvement of discontinuous noise effect?
True Diversity, the reception is sourced from two same standardized tuners which are separately installed at different position of antenna, they receive the signal from same microphone, using speedy comparator and interchange antenna circuits, choose automatically the powerful signal output. When the signal reception is weak, using this type of reception can improve the density function about 5 times of single antenna reception. If the signal is powered about 3 times (10dB), this can improve 45 times or above. As there is in proper close distance, no discontinuous noise will be happened. As the sensitivity of receiver is high, the reception distance will be far and the discontinuous noise will be lesser, the weak signal will then be closed to mute, the probability of noise will be minimized.
3.To be sure, a good quality wireless microphone, should choose true diversity premises?
The normal manufacturer of wireless microphones adopt single antenna which is a non-diversity reception circuits, to minimize the manufacturing cost, selling low price to compete with market. This type of non-diversity receiver, especially in complex environment and dispersed venture, discontinuous sound and noise cannot be escaped. Thus, any considered sound quality venture, to guarantee the perfect audio quality, should be used the true diversity system. Although the price is comparatively high, it is inevitable to choose this model for avoiding the disturbance of discontinuous sound and noises.
4.Why do the wireless microphone adopting PLL module-locked system?
Crystallized control is the most basis design of wireless microphone system design in recent years which is stable, easily to control and beneficial to economy. However, multiple channels with fast changing frequencies, and selection without interference of noise become the first criteria of professional premise. Thus, the new trend of the World’s wireless microphone system design is changed from crystallized control of fixed frequency premise to PLL module locked multiple channels and multi-functional professional equipment.
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