User guide

8B/10B Comparison Results Window
This window displays the actual or cumulative results of the following
measurements:
• Symbol Error Ratio (SER). See “SER Results Window” on page 367.
• Frame Error Ratio (FER). See “FER Results Window” on page 368.
• Calculated Bit Error Ratio (cBER). See “cBER Results Window” on page 368.
• Filler Symbol Ratio (FSR). See “FSR Results Window” on page 369.
• Disparity Error Ratio (DER). See “DER Results Window” on page 370.
• Illegal Symbol Ratio (ISR). See “ISR Results Window” on page 371.
SER Results Window
This window displays the actual (SER) or cumulative (AccumSER) SER results:
• The SER is the current SER, calculated upon a period of 200ms.
• The AccumSER shows either the accumulated SER of the current
accumulation, or - if no accumulation is running - the results of the most recent
accumulation.
This enables you to monitor real-time SER behavior as you do things such as to
manually adjust the sampling point, to add errors, or to make adjustments to your
device.
Evaluating Results 7
Agilent J-BERT N4903B High-Performance Serial BERT 367