Agilent Technologies Signal Analyzer N9030a - Manual (Page 1355)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
Trace/Detector
Negative Peak
For each bucket (interval) in the trace, Negative Peak detection displays the lowest sample within
the bucket. Negative peak detection is similar to peak detection, but selects the minimum video
signal.
Key Path Trace/Detector, Detector
Example DET:TRAC2 NEG Selects the negative peak detector for trace 2.
Couplings Selecting a specific detector type turns “Auto” to false for this trace (manual).
Selecting a detector for a trace (pressing the key or sending a [:SENS]:DET:TRAC command) puts
Update On and DisplayOn for that trace, even if that detector was already selected. Note that
the legacy command [:SENS]:DET[:FUNC] does NOT exhibit this behavior.
Selecting a detector, whether by pressing the softkey or sending the equivalent SCPI command,
will turn trace math to Off for the selected/specified trace.
Initial S/W Revision Prior to A.02.00
Quasi Peak
Only appears with the N6141A or W6141A application or Option EMC installed and licensed.
This is a fast-rise, slow-fall detector used in making CISPR compliant EMI measurements and
defined by CISPR Publication 16–1–1. Quasi-peak detection displays a weighted, sample-detected
amplitude using specific, charge, discharge, and meter time constants derived from the legacy
behaviors of analog detectors and meters. It is used for EMI measurements to provide a specific
and consistent response to EMI-like signals.
Note that CISPR standard operation is to perform the averaging associated with quasi peak
detection on the voltage scale. You can manually set the Average Type to Log-Power or Power, but
the results will no longer be CISPR compliant.
See "More Information" on page 1356 .
Key Path Trace/Detector, Detector
Example DET:TRAC3 QPE Selects the quasi-peak detector for trace 3.
Dependencies Unavailable in manual FFT sweep.
Unavailable when Tune & Listen is turned on, or Demod Audio is the selected Analog Output:
Couplings If the user selects this detector on any active trace, the EMI Standard will be set to CISPR. If any
inactive trace with this detector selected goes active, the EMI Standard is set to CISPR.
If the Avg Type is in Auto, and this detector is selected on any active trace, the Voltage
Averaging type is auto-selected.
The VBW filter is not used for this detector, so varying the VBW will have no effect for any
Remote Language Compatibility Measurement Application Reference 1355