DIN EN 50065-4-3-2003
频率范围为3KHz至148.5KHz的低压电气设备信令传输.第4-3部分:低压退耦滤波器.输入滤波器
Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz - Part 4-3: Low voltage decoupling filter; Incoming filter; German version EN 50065-4-3:2003