Agilent Technologies E5022A Operation Manual page 303

Measurement Definition
Parametric Sweep Measurement Definitions
Gaussian Noise Level Calculation Method
If a track profile data array and noise threshold ratio are described as "profileData[ ]" and
"noiseThr" respectively, the Gaussian noise level ("gaussianNoiseLevel") is calculated as
follows:
1. Obtain maximum value ("max") and minimum value ("min") of "profileData[ ]."
2. Calculate noise threshold level ("noiseThrLevel") using the following equation:
noiseThrLevel =
3. Calculate Gaussian noise level using the following ezuation:
gaussianNoiseLevel =
where,
count: number of elements whose values are below "noiseThrLevel"
sum: sum of element's values below "noiseThrLevel."
Noise Floor Calculation Method
Noise Floor is calculated as follows:
1. Calculate noise level ("noiseLevelD") from "Data[ ]" and noise threshold ratio
("noiseThr") in accordance with "Gaussian Noise Level Calculation Method" on
page 302.
2. Calculate noise level ("noiseLevelS") from "SquashedData[ ]" and noise threshold
ratio ("noiseThr") in accordance with "Gaussian Noise Level Calculation Method" on
page 302.
3. Calculate noise floor ("NoiseFloor") using the following equation:
NoiseFloor =
302
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( ) noiseThr ×
max Ð min +
sum
------------- -
count
noiseLevelD + noiseLevelS
----------------------------------------------------------------------- -
2
min
Chapter 5