R&S FSH
Receiver Mode
Configuring Measurements in Receiver Mode
Operating Manual 1309.6275.12 - 14
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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.
M
Press the TRACE key.
M
Press the "Detector" softkey.
M
Select the detector you want to use.
For more information on detectors in general, see "
Selecting the trace mode and working with memory traces
For more information on trace modes and memory traces see "
" and "
6.2.2 Selecting the Measurement Bandwidths for EMI Measurements
The receiver mode adds 6 dB resolution bandwidths to the 3 dB resolution bandwidths
already available in other operating modes. The 6 dB bandwidths are special
bandwidths that are necessary for measurements according to CISPR16.
If automatic selection of the CISPR bandwidth is on or when you use the quasi peak
detector, the R&S FSH selects an appropriate CISPR bandwidth, depending on the
receive frequency.
C
Frequencies < 150 kHz: 200 Hz CISPR bandwidth
C
Frequencies from 150 kHz to 30 MHz: 9 kHz CISPR bandwidth
C
Frequencies from 30 MHz to 1 GHz: 120 kHz CISPR bandwidth
C
Frequencies > 1 GHz: 1 MHz CISPR bandwidth
You can also select a 3 dB or 6 dB bandwidth manually.
M
Press the BW key.
M
Press the "Manual RBW" softkey to select a 3 dB bandwidth.
or
M
Press the "Manual CISPR BW" to select a 6 dB bandwidth.
M
Select the bandwidth you need with the rotary knob or by entering the corresping
number.
M
Press the "Auto CISPR BW" to select the 6 dB bandwidth automatically.
