Instructions

Chapter 2 Front Panel Operation RIGOL
User’s Guide for DSA800 Series
2-27
7. Quasi-Peak (an option for DSA800)
It is a weighted form of peak detector. For each data point, the detector detects
the peaks within the corresponding time interval. The peaks detected are
weighted using circuit with specified charge and discharge structures as well as
the display time constant specified in the CISPR Publication 16 standards and
the result is displayed. Quasi-Peak detector is applicable to EMI testing.
Note: Compared to the discharge time, the charge time of Quasi-Peak
detector is much shorter and can reflect the amplitude as well as time
distribution of the signal.
Filter Type
Set the RBW filter type.
Key Points:
 DSA800 supports two kinds of RBW filters: “Gause” (-3 dB bandwidth) and
“EMI” (-6 dB bandwidth).
 When “EMI” is selected, resolution bandwidth can be 200 Hz, 9 kHz or 120
kHz only.
 The default is “Gause”; the instrument will switch to “EMI” filter automatically
when “Quasi-Peak” detector is selected.