Rohde & Schwarz FSH4 - Selecting the Measurement Bandwidths for EMI Measurements

R&S FSH Receiver Mode (R&S FSH-K43)
Configuring Measurements in Receiver Mode
Operating Manual 1173.6275.12 - 30 240
8.2.2 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, the R&S FSH selects an
appropriate CISPR bandwidth, depending on the receive frequency.
● Frequencies < 150 kHz: 200 Hz CISPR bandwidth
● Frequencies from 150 kHz to 30 MHz: 9 kHz CISPR bandwidth
● Frequencies from 30 MHz to 1 GHz: 120 kHz CISPR bandwidth
● Frequencies > 1 GHz: 1 MHz CISPR bandwidth
You can also select a 3 dB or 6 dB bandwidth manually.
► Press the BW key.
► Press the "Manual RBW" softkey to select a 3 dB bandwidth.
or
► Press the "Manual CISPR BW" to select a 6 dB bandwidth.
► Select the bandwidth you need with the rotary knob or by entering the corresping
number.
► Press the "Auto CISPR BW" to select the 6 dB bandwidth automatically according
to the list above.