Line rate and field rate sweep signals can be used to measure the frequency response of a system. In a sweep signal, the frequency of the waveform is continuously increased over the length of the line or field. A sweep signal allows you to examine the frequency response continuously over the interval of interest rather then at only discrete frequency intervals as tested by the multiburst or multiphase signals. The Sweep signal however cannot be used for VITS, thus is limited to out-ofservice testing. See the Frequency Response discussion.