CST MWS中Discrete port設置為voltage port，constant voltage amplitude如何理解？

幫助文檔中的內(nèi)容：
Voltage port: This port type realizes a voltage source, exciting with a constant voltage amplitude. If this port is not stimulated in the transient analysis, the voltage along the wire is set to zero. The voltage excitation signal will be recorded during the solver run.
exciting with a constant voltage amplitude. 這句話不好理解，激勵既然是脈沖，如何來定義常數(shù)的幅度呢？

按照幫助文件所說，電壓形式的離散端口看作一個理想電壓源，這種情況下為什么激勵是脈沖？樓主你有相關的幫助文件證明么？

管理員，你好，你的意思是CST默認的Excitation Signals 在此時是沒有用的嗎？謝謝。