简易信号源，简易频谱。可作宽带信号源、宽带扫频信号源、宽带简易频谱使用，配合噪音源可做跟踪源，可测量滤波器、天线等器件的参数。(Simple signal source, simple spectrum. It can be used as wideband signal source, wideband sweep signal source and broadband simple spectrum. It can be used as tracking source with noise