R&S FSH
Receiver Mode (R&S FSH-K43)
Configuring Measurements in Receiver Mode
Operating Manual 1173.6275.12 - 30
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8.2 Configuring Measurements in Receiver Mode
In addition to the single frequency measurement and the scan measurement, the
receiver mode also adds features in accordance with EMI measurements.
8.2.1 Selecting Detectors for EMI Measurements
The receiver mode provides several types of detectors also available in other operating
modes. In addition, it adds the average and quasi peak detectors.
● Max Peak
If the max peak detector is active, the R&S FSH displays only the maximum power
of the signal that was measured during the measurement time.
● Average
If the average detector is active, the R&S FSH calculates and displays the (linear)
average power of the signal that was measured during the measurement time.
● RMS
If the RMS detector is active, the R&S FSH calculates and displays the RMS
power of the signal that was measured during the measurement time.
● Quasi Peak
If the quasi peak detector is active, the R&S FSH evaluates the signal in a way that
complies to the requirements defined by CISPR16.
It is designed for EMI measurements and especially useful for the evaluation of
pulse shaped spurious emissions.
When you use the quasi peak detector, the R&S FSH uses a particular evaluation
curve or bandwidth depending on the CISPR band.
-
CISPR band A (frequencies < 150 kHz): 200 Hz bandwidth
-
CISPR band B: (frequencies from 150 kHz to 30 MHz): 9 kHz bandwidth
-
CISPR band C/D: (frequencies from 30 MHz to 1 GHz): 120 kHz bandwidth
-
Frequencies > 1GHz: 120 kHz bandwidth
Bandwidth selection for the quasi peak detector
If you select the quasi peak detector, the R&S FSH automatically select a 6 dB filter
bandwidth depending on the measurement frequency.
If you select a 3 dB bandwidth while using the quasi peak detector, the R&S FSH
deactivates the quasi peak detector.
