The equipment is for monitoring the ambient noise in PA zone, and automatically control the output power of PA system, to keep the broadcast volume higher than the ambient noise.
Specifications
- Audio input impedance: >= 20 K ohm
- Audio output impedance:
Features
- Measuring ambient is adopted in noise testing circuit, the equipment is with high common mode rejection ratio, capable to test accurately the exact noise level at each testing point.
- In each PA zone the noise samples are taken from three testing points, and sent to the single chip via AID switch circuit for software comparison process consequently the anti-interference ability of the equipment is improved.
- Language distingue wishing circuit distinguishes the intermittence of long age automatically, and takes samples at the testing point during the intermittence to insure the reliability of sampling data.
- Two operate modes of manual and automatic.
- Convenient for operation and maintenance.
Main Products
Broadcasting System