![Decreasing the Resolution Bandwidth](/images/new-backgrounds/158543/15854385x1.webp)
Making Measurements 3
Decreasing the Resolution Bandwidth
Resolution bandwidth settings affect the level of internal noise without affecting the level of continuous wave (CW) signals. Decreasing the RBW by a decade reduces the noise floor by 10 dB.
1Refer to “Reducing Input Attenuation" on page 31, and follow steps 1, 2 and 3.
2Decrease the resolution bandwidth:
•Press [BW/SWP] > {RBW}, and toggle RBW setting to Man (manual), then decrease the resolution bandwidth using the knob, the
arrow keys or the numeric keypad.
The low level signal appears more clearly because the noise level is reduced.
Figure 9 Decreasing resolution bandwidth
N9340A User’s Guide | 33 |