RIGOL DSA875 - Manual (Page 122)

RIGOL Chapter 2 Front Panel Operation
User’s Guide for DSA800 Series 2-70
Table 2-46 Noise Bandwidth for C/N Ratio Measurement
Parameter Description
Default 2 MHz
Range 33 Hz to 2.5 GHz
Unit GHz, MHz, kHz, Hz
Knob Step Noise BW/100, the minimum is 1 Hz
Direction Key Step in 1-1.5-2-3-5-7.5 sequence
5. Carrier BW
Set the bandwidth of the carrier to be measured.
 The carrier bandwidth is related to the noise bandwidth and the range
available is from noise bandwidth/20 to noise bandwidth×20.
 You can use the numeric keys, knob or direction keys to modify this
parameter.
Table 2-47 Carrier Bandwidth for C/N Ratio Measurement
Parameter Description
Default 2 MHz
Range 33 Hz to 2.5 GHz
Unit GHz, MHz, kHz, Hz
Knob Step Carrier Noise/100, the minimum is 1 Hz
Direction Key Step in 1-1.5-2-3-5-7.5 sequence