Squelch: When the receiver of uhf ktv wireless microphone AY-URX7Ⅱ does not receive the signal, or the signal is weak, in order to avoid output noise, it will automatically cut off the output signal, this function is called squelch. If there is no squelch function, or if the squelch function is poor, noise will be emitted from the speaker speakers. Noise will affect the sound quality, destroy the atmosphere of the scene, and even damage the amplifier equipment.

Dead Spot: Also known as dead zone. During the moving process of uhf ktv wireless microphone AY-URX7Ⅱ, the signal received by the receiver will change in intensity due to the difference in distance, relative position or the obstruction of obstacles. In some positions within the normal use distance, the too weak signal will make the squelch circuit in the receiver act and cut off the output signal; after leaving the position, it can receive and output normally. This position is called the dead center or dead zone.

Diversity reception: It means that the uhf ktv wireless microphone AY-URX7Ⅱ receiver can receive the signal of the same uhf ktv wireless microphone AY-URX7Ⅱ from two antennas respectively, and select the stronger one signal through the internal circuit. This method can greatly eliminate the receiving dead zone and avoid weak sound or dead spot noise. There are two ways to receive diversity: antenna diversity and mid-range diversity.