Network PA system is based on internet and built in modules and layers. It is an integrated and intelligent PA system. The system is digital transmission and realized by Lan. The transmission distance can reach more than 10 kilometers. The configuration of this system can take advantage of the existing LAN system, and is time &cost saving. The combination with the LAN makes it possible for interaction function, which the traditional PA system unable to realize. Unlike traditional PA system which is only able to transmit information in one direction and control in station, this network system make it possible for interaction function due to its combination with LAN system. The network PA system center is able to connect to multiple terminals, such as, play terminal, on-demand terminal, paging terminal, one-touch emergency alarm terminal. The system center has the function of player, zoning, pre-amplifier, timer, equalizer, and powerful audio matrix, etc. The network PA system can be applied to different occasions, such as, airport, port, university, school, large gathering site (e.g. Expo), stadium, industrial park, park, railway, highway, etc.
Test item | Indicator parameters | ||
EMC parameters (EMC LINE IN port input) | CH1, CH2, CH3 and CH4 rated output | 1V | |
Input sensitivity | MAX: | 250mV | |
MIN: | 4V | ||
Effective frequency range of gain limit (±3dB) | 50Hz-20kHz | ||
Signal-noise ratio (low pass 30kHz) | ≥70dB | ||
Total harmonic distortion (1kHz, 1/3 output voltage) | ≤0.1% | ||
EMC LINK output | Equal to EMC LINE input (±10%) | ||
Input dynamic scope | ≥26dB | ||
Network decoding parameters (host machine MP3 input) | CH1, CH2, CH3 and CH4 rated output | 1V | |
Distortion degree (1kHz -10dB/MP3) | ≤0.2% | ||
Effective frequency range of gain limit (±3dB): | 50Hz-20kHz | ||
Signal-noise ratio (low pass 30kHz) | ≥70dB | ||
Alarm output (Host software control) | COM-24V output | 24V (≤100mA) | |
COM-SC output | Short circuit (＜1Ω) | ||
Built-in monitoring power | 1.2W | ||
Network | Dual network interface 10M/100M self-adaptive | ||
Power | AC 180V-242V/50Hz | ||
Power consumption | 12W | ||
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