Information
RIGOL 
DSA800 Options and Accessories 
3 
EMI Filter and Quasi-Peak Detector   
DSA800-EMI option provides Quasi-Peak detector and EMI filter (200 Hz, 9 kHz, 120 
kHz, -6 dB bandwidth). Quasi-Peak detection is a weighted form of peak detection. 
For each data point, the detector detects the peaks within the specified time interval, 
weights the  peaks detected using circuit with specified charge and discharge 
structures as well as the display time constant specified in the CISPR Publication 16 
standards and display the result. By default, the instrument uses Gauss filter and will 
switch to EMI filter automatically if Quasi-Peak detector is selected.   
Press  BW/Det  at  the  front  panel.  Then,  press  Det  Type  to  select  Quasi-Peak 
detector. At this point, the instrument automatically changes the filter type to EMI 
and the Filter Type menu is grayed out and disabled. DSA800-EMI option is used in 
electromagnetic interference test. 










