User`s guide

Functions and Measurements 3
N9320A Spectrum Analyzer 41
A lower attenuation value will mean that more of the signal
strength will be displayed on screen:
Press > Attenuation > 0 > dB
Figure 11 Measuring a low-level signal using 0 dB Attenuation
Decreasing the Resolution Bandwidth
Resolution bandwidth settings affect the level of internal
noise but have little affect on the displayed level of
continuous wave (CW) signals. Decreasing the RBW by a
decade (factor of ten) reduces the noise floor by 10 dB.
1 Refer to the procedure “Reducing Input Attenuation” on
page 39 and follow steps 1, 2 and 3.
2 Decrease the resolution bandwidth:
Press and
The low- level signal appears more clearly due to the noise
level being reduced by the decrease in RBW (see Figure 12).
Amplitude
BW/
Avg
FM