Is that the RBW the smaller the better?

The tracking generator is the common implements of the spectrum analyzer. When the output of the tracking generator is connected with the input of the spectrum analyzer, the spectrum analyzer and tracking generator can form a completely sweep frequency measuring system. The signal frequency of the tracking generator can track the tuning frequency accurately. Spectrum analyzer matches with the tracking generator can be used as the analysis of network, such as the frequency response and insertion loss of the device.