80 Chapter 2
Instrument Functions: A - L
Det/Demod
Instrument Functions: A - L
• EMI Average − displays the instantanewous level of the signal at the center of the
bucket, just like the sample detector. Also changes the auto coupling of VBW, RBW and
Avg/VBW Type and the set of available RBWs. Used in making CISPR-compliant
measurements.
• EMI Peak − the same as the Peak detector but uses CISPR related bandwidths.
• MIL Peak − the same as the Peak detector but uses MIL related bandwidths.
Because they may not find the true peak of a spectral component, neither average nor
sample detectors measure amplitudes of CW signals as accurately as peak or normal, but
they do measure noise without the biases of peak detection.
The detector in use is indicated on the left side of the display, just below Reference level.
The designators are:
• Norm − Normal detector
• Avg − Average detector
• Peak − Peak detector
• Samp − Sample detector
• NPk − Negative Peak detector
• EmiQP − Quasi Peak detector
• EmiAv − ΕMI Average detector
• EmiPk − Peak detector with CISPR bandwidths
• MILPk − Peak detector with MIL bandwidths
If the detector has been manually selected, a # appears next to it.
TIP RMS Detection
To measure the average power (RMS voltage) in each display point, set
Detector to Average, and verify that Avg/VBW Type is set to Pwr Avg (RMS).
Key Path:
Det/Demod
State Saved: Saved in Instrument State
Factory Preset: Normal, Auto Coupled
To Next Page
Loading...
Need help?
General
