Keysight U8903A, User Manual, Page: 78 / 167

3 Instrument Configuration
78 Keysight U8903A User’s Guide
AC level detection
There are three AC level detection types consisting of RMS, Peak-to-Peak, and
Quasi Peak as shown in the following figure. The RMS detector performs a
conventional true root-mean-square (RMS) measurement on the input signal. This
RMS value includes the DC component, unless the AC coupling mode is selected.
The Peak-to-Peak detector returns the peak-to-peak voltage, while the Quasi
Peak detector provides a response conforming to the CCIR-468 specification for
noise measurements. This detector is usually used together with the CCIR-1k
weighted filter.
Figure 3-4 AC level detector selection