Agilent E8257C信号发生器FM Dev如何被整合到FM信号方程中

嗨，我正在尝试使用Agilent E8257C信号发生器生成FM信号。
你能否告诉我FM_Dev如何被整合到FM信号方程中。
根据我的教科书，如果FM信号的模型是：x（t）= cos（2 pi ft + 2 pi Delta_f y（t））其中y（t）是具有归一化幅度的调制信息音（即最大值）
幅度= 1）。
我将Delta_f定义为频率偏差。
我意识到当我在示波器上设置FM_Dev = 25 KHz（5 KHz增量）时，我得到输出信号（在频谱分析仪上测量），设置中心频率f = 100 MHz和y的FM信号的Delta_f = 0.2
（t）频率为20 KHz。你能告诉我FM_Dev和Delta_f之间的关系是什么？谢谢，Sushil



     以下为原文

  Hi,

I am trying to generate an FM signal using the Agilent E8257C Signal Generator.

Can you please tell me how FM_Dev is incorporated into the FM Signal equation. According to my textbook, if the model for the FM signal is:

x(t) = cos (2 pi f t + 2 pi Delta_f y(t))

where y(t) is a modulating information tone which has normalized amplitude (i.e. maximum amplitude = 1). I define Delta_f as the frequency deviation.

I realize that when I set FM_Dev = 25 KHz (5 KHz increment) on the scope I get the output signal (measured on Spectrum Analyzer), as setting the Delta_f = 0.2 for an FM signal with the center frequency f = 100 MHz and y(t) is of frequency 20 KHz.

Can you please tell me what the relation between FM_Dev and Delta_f is?

Thanks,
Sushil