User guide

where Mean is the High Level of the terminal.
• Low Level Std. Dev.
The Low Level Standard Deviation is calculated as:
where Mean is the Low Level of the terminal.
• Peak Peak Noise
The peak-to-peak Noise is calculated as:
Note that the Threshold Margin depends on the position of the BER
Threshold.
•
Signal/Noise Ratio (RMS)
The RMS Signal-to-Noise Ratio is calculated as:
• Signal/Noise Ratio (Peak Peak)
The peak-to-peak Signal-to-Noise Ratio is calculated as
Note that the Peak Peak Noise depends on the position of the BER
Threshold.
The Q-factor result parameters are summarized in the following table:
Table 29
Parameter Name Pass/Fail
Q Factor min
Q Optimum Threshold min/max
Q Residual BER max
Q High Level
Q High Level Std.Dev
Advanced Analysis 6
Agilent J-BERT N4903B High-Performance Serial BERT 279
Q-factor Results