If the isolators in figure 20 are neglected, the isolation measurement (port P2 to port P3) determines the amount of power from the signal generator F2 that will be injected into the signal generator F1.
如果忽略圖20中的隔離器，則隔離測量（端口P2到端口P3）確定來自信號產生器 的功率量F2將被注入信號發生器 F1。