Chapter 2 227
One-Button Measurement Functions
Meas Setup (Spurious Emissions)
One-Button Measurement Functions
2.24.3.14 Negative Peak
For each interval (bucket) in the trace, Negative Peak detection displays the lowest sample
within the interval.
When Negative Peak is selected, NPk appears on the left side of the display.
Key Path: Meas Setup, Range Table, Detector 1 or Detector 2
State Saved: Saved in instrument state.
History: Added with PSA firmware revision A.06.00
Remote Command:
See “Detector 2” on page 224.
2.24.3.14.1 Quasi Peak PSA Only: Selects quasi peak detection. This is a fast-rise,
slow-fall detector used in making CISPR compliant EMI measurements. Quasi peak
detection displays a weighted amplitude using specific charge, discharge, and
meter-movement time constants as described in CISPR Publication 16.
Key Path: Meas Setup, Range Table, Detector 1 or Detector 2
State Saved: Saved in instrument state.
History: Added with PSA firmware revision A.06.00
Remote Command:
See “Detector 2” on page 224.
2.24.3.14.2 EMI Average PSA Only: Selects EMI averaging detection. EMI Average
detection displays the average value of amplitude envelope. It is defined for EMI
measurements by the CISPR standard and uses the VBW filter as a low pass filter, the
output of which is sampled during the bucket interval. This functionality is quite different
from the Average detector.
Key Path: Meas Setup, Range Table, Detector 1 or Detector 2
State Saved: Saved in instrument state.
History: Added with PSA firmware revision A.06.00
Remote Command:
See “Detector 2” on page 224.
2.24.3.14.3 EMI Peak Selects peak detection using EMI specifications.
Key Path: Meas Setup, Range Table, Detector 1 or Detector 2