Quote：
The May 4th Movement is a great patriotic movement against imperialism and feudalism in the history of China.Baokang County Secondary Vocational and Technical School decided to carry forward the May 4th spirit by means of art performances.
Difficult points：
The venue for this performance was a wide outdoor stage with complex performance environment,and some parts of the stage even had areas with weak wireless signals.In order to ensure the stable transmission of wireless signals,wireless microphone products with mature technology should be selected to ensure the wonderful performance without interruption;At the same time,Baokang County Secondary vocational and technical School is located in the hinterland of Jingshan and surrounded by mountains in all directions.The heavy humidity and low temperature are the higher requirements for the quality of electronic equipment.
The Solution:
After many discussions between the engineering team and the school leaders, it was decided to adopt ER-5700 dual-channel true diversity wireless microphone system as the main sound reinforcement equipment. With FM superheterodyne receiver to ensure the stable audio transmission of the microphone and receiver for the whole show escort; The built-in multi-band inter working function supports the E, I, J and K multi-band receivers to interuse wireless microphones in different frequency bands. When the number of participants is large, only the microphone can be added, which is convenient for the staff to add flexible microphones.
In order to cope with the signal transmission blind area in some areas of the stage and the harsh environment in the mountain area, it was decided to use R-32AU full-frequency antenna and R-14D antenna splitter to provide comprehensive signal coverage for the stage. Traditional antenna in the face of bad weather such as rain and snow possible rust and shorter service life, etc, and in the area of RF serious environmental interference may affect, and R - 32AU broadband radar antenna USES a sturdy metal building have certain waterproof and function, can provide signals in outdoor weather continued to show expanding function, And by using the principle of high sensitivity of the front end of the heart direction, weak and linear single direction of the rear can effectively suppress the rear interference signal. Two sets of 32AU full-frequency antennas are used at an Angle of 120° each (pointing Angle is left and right 120°; Up and down 180°) through the R-12S antenna hub in parallel to the R-14D antenna splitter to form a antenna amplifier system (R-12S antenna hub can divide one RF signal into two or two RF signals into one; Note: There will be a certain attenuation of RF gain).
Composition of the system:
A total of 7 sets of ER-5700 dual-channel true diversity wireless microphone systems were used in this performance scheme, among which 4 sets connected with R-14D antenna divider were used for the main stage, and the rest were used for judges and backup. 5 UD-2 desktop wireless microphones were used for the judges' seats. Four EH-38 hand-held microphones and four ET-50 money pack transmitters were used by the host and the teachers and students participating in the performance. Two sets of R-32AU broadband direction-oriented antennas were connected through one R-12S antenna hub in each set, and then connected to one R-14D antenna divider to form the wireless microphone equipment required for the whole performance.
Conclusion：
The May 4th Youth Day performance was successfully concluded. The flexible versatility and reliable quality of ER-5700 dual-channel true diversity wireless microphone system made the school leaders full of praise, and also recognized the professionalism of the force card team.
