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SIGLENT
SSA3000X User Manual 30
2.2.2.7 Calculation Type
Spectrum Analyzer provides the calculation types as shown below:
Power : X-Y+Offset
Power : X+Y+Offset
Log : X+Offset
Log : X-Y+Ref
2.2.3 Detect
The analyzer displays the sweep signal on the screen in the form of trace. For each trace point, the
analyzer always captures all the data within a specific time interval and processes (Peak, Average, etc.)
the capture data using the detector currently selected, then display the processed data (one point) on
the screen.
◆ Select an appropriate detector type according to the actual application in order to ensure the
accuracy of the measurement.
◆ The available types are Pos Peak, Neg Peak, Sample, Normal, Average and Quasi Peak. The
default is Pos peak.
1. Positive Peak
For each trace point, Positive Peak detector displays the maximum value of data sampled within the
corresponding time interval.
2. Negative Peak
For each trace point, Negative Peak detector displays the minimum value of data sampled within the
corresponding time interval.
3. Sample
For each trace point, Sample detector displays the transient level corresponding to the central time
point of the corresponding time interval. This detector type is applicable to noise or noise-like signal.
4. Normal
Normal detector (also called rosenfell detector) displays the maximum value and the minimum value of
the sample data segment in turn; namely for an odd-numbered data point, the maximum value is
displayed; for an even-numbered data point, the minimum value is displayed. In this way, the amplitude
variation range of the signal is clearly shown.
5. Average
For each trace point, Average detector displays the average value of data sampled within the
corresponding time interval.
6. Quasi Peak
Quasi-Peak detector, which is a weighted form of peak detector, is used for EMC pulse testing ruled by
CISPR. For single frequency point, the detector detects the peaks within QPD dwell time. The peaks
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