Specifications

Chapter 7 55
Measuring Noise
Measuring Noise-Like Signals Using the Channel Power Measurement
Measuring Noise
Step 7. Optimize the analyzer reference level setting:
Press
Meas Setup, Optimize Ref Level.
Your display should be similar to Figure 7-4.
Figure 7-4 Measuring Channel Power (ESA left, PSA right)
The power reading is essentially that of the tone; that is, the total noise
power is far enough below that of the tone that the noise power
contributes very little to the total.
The algorithm that computes the total power works equally well for
signals of any statistical variant, whether tone-like, noise-like, or
combination.