号 【中文名称】：业务信号 【英文名称】：service signal 【定义1】： 由电信网自动发向主叫终端的信号，它表明一次呼叫的进程或试呼叫失败的原因。 【来源】： GB/T 14733.5-1993（术语标准）；
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前一种方法的思路是先削弱卫星业务信号能量然后检测其循环自相特征。
In the former method, we need weaken the energy of satellite signal firstly, and then detect the cyclic auto-correlation characteristic.
衡量DWDM系统传输质量时，以满负载时所承载的业务信号的传输质量作为标准。
Weighing the quality of transmission of DWDM system should be based on the business transmission quality of signal with the full load.
这些按钮可用作一个信号，以便用户能够触发一个活动或业务流程。
These buttons can be used as a signal so that a user can trigger an activity or business process.
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