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Making Measurements 3
N9340A User’s Guide 33
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.
1 Refer to “Reducing Input Attenuation" on
page 31, and follow steps 1, 2 and 3.
2 Decrease 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