RIGOL DSA875 - Manual (Page 140)

RIGOL Chapter 2 Front Panel Operation
User’s Guide for DSA800 Series 2-88
Figure 2-24 N dB BW measurement
Key Points:
 When the measurement starts, the analyzer will search for the two points
which are located at both sides of the current point with N dB fall or rise in
amplitude and display the frequency difference between the two points in the
active function area. "----" would be displayed if the search fails.
 You can use the numeric keys, knob or direction keys to modify the value of N,
for more details please refer to “Parameter Setting”.
Table 2-56 N dB BW parameter settings
Parameter Explanation
Default -3 dB
Range -100 dB to 100 dB
Unit dB
Knob Step 0.1 dB
Direction Key Step 1 dB
Function Off
Turn off the noise marker enabled or N dB BW measurement, but not the marker
itself.
N dB
N dB
Bandwidth