58 U8903A User’s Guide
3 Instrument Configuration
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
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