释义 |
secondary channel 辅助信道 In data communications, a transmission channel with a narrow band width that is derived from the main channel by a notch filter that introduces a “guard band” of highly attenuated frequencies to split the channel. Such a channel can be used as a supervisory channel, for lowspeed data that is independent of that on the main channel, or for telemetry. 在数据通信中,一种窄带传输信道,该信道用陷波滤波器从主信道中得到,陷波滤波器 产生高衰减频率的“防护波段”,以分割信道。这样的信道可被用作监控信道,用于与主 信道数据传输无关的低速数据传输或遥测。 |