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The Spectrum Application (RF Measurements)
R&S
®
FPL1000
392
User Manual 1178.3370.02 ─ 11
Detector
Abbrev.
Description
CISPR Aver-
age detector
CISPR
AV
The CISPR Average detector displays a weighted average signal level accord-
ing to CISPR 16-1-1.
The average value according to CISPR 16-1-1 is the maximum value detected
while calculating the linear average value during the specified dwell time.
This detector is only available for the CISPR filter, and only if the R&S
FPL1
EMI measurement option (K54) is installed.
Note the restrictions described in
RMS Average
detector
RMS AV The RMS Average detector is a combination of the RMS detector (for pulse
repetition frequencies above a corner frequency) and the Average detector (for
pulse repetition frequencies below the corner frequency).
The CISPR Average detector is only available for the CISPR filter, and only if
the R&S
FPL1 EMI measurement option (K54) is installed.
Note the restrictions described in
The result obtained from the selected detector for a sweep point is displayed as the
value at this frequency point in the trace.
video
signal
s1 s2 s3 s4 s5 s6 s8 s1
video
signal
s1 s2 s3 s4 s5 s6 s8 s1
Measurement point n
Video
Signal
Meas. point n+1
MAX PEAK
AUTO PEAK
MIN PEAK
SAMPLE
RMS
AVG
You can define the trace detector to be used for the individual traces manually, or the
R&S
FPL1000 can select the appropriate detector automatically.
The detectors of the R&S
FPL1000 are implemented as pure digital devices. All detec-
tors work in parallel in the background, which means that the measurement speed is
independent of the detector combination used for different traces.
RMS detector and VBW
If the RMS detector is selected, the video bandwidth in the hardware is bypassed.
Thus, duplicate trace averaging with small VBWs and RMS detector no longer occurs.
However, the VBW is still considered when calculating the sweep time. This leads to a
longer sweep time for small VBW values. Thus, you can reduce the VBW value to ach-
ieve more stable trace curves even when using an RMS detector. Normally, if the RMS
detector is used, the sweep time should be increased to get more stable traces.
Trace Configuration