Measurements and results
R&S
®
FSVA3000/ R&S
®
FSV3000
327
User Manual 1178.8520.02 ─ 08
●
1
MHz
If you select a CISPR or MIL filter type, the corresponding RBW that is closest to the
currently selected RBW value is used. In this case, the channel bar indicates "RBW
(CISPR)".
For the quasi-peak, CISPR Average, or RMS Average detector, the bandwidth is fixed
depending on the frequency. For more information, see
5.13.3.2
Detectors and dwell time
The EMI measurement adds new detectors to those already available with the base
unit. The additional detectors are especially designed for and required by EMI applica-
tions.
The additional detectors are available only if the EMI (R&S
FSV3-K54) measurement
option is installed. However, the EMI measurement need not be active.
The detector to be used for the initial peak search is configured in the trace settings
(see
Chapter 7.5.1.2, "Trace settings"
on page 586). The detector for the final test is
configured in the EMI marker settings, see
Chapter 5.13.4.1, "EMI marker configura-
Restrictions for the R&S
FSV/A using CISPR detectors
Using the CISPR filter, specific detectors (Quasipeak, CISPR Average, RMS Average)
are available for EMI measurements. However, if any of the CISPR detectors are used
as trace detectors, the following detectors cannot be used as trace detectors for other
traces in the same display:
●
Negative peak
●
Auto peak
●
Sample
If you select a CISPR detector for a trace, any traces using incompatible detectors are
automatically set to "Auto detector", which uses the positive peak detector.
If you manually set a trace to use an incompatible detector, any traces currently using
a CISPR detector are automatically set to "Auto detector".
CISPR detectors are only available under the following conditions:
●
Time domain measurements and frequency measurements in sweep mode (not
FFT mode, not power measurements, emission measurements, or statistics mea-
surements)
●
Trigger mode "Free Run" or "External" (trigger offset
≥
0 only for "External")
●
Gate mode: "Off"
Dwell time
EMC tests often require a specific
dwell time
for an EMI measurement. The dwell time
defines how long the R&S
FSV/A measures the signal at the individual frequencies.
Each detector needs a different period of time to fully charge and discharge; the indi-
Electromagnetic interference (EMI) measurement
