User guide

Press the Auto Align key on the front panel
Switch to the Accumulated Results Screen
Press the Start Accum key on the front panel to start the BER
measurement
For each measurement write down the number of errors at the end of the
measurement
The correct Input Timing is selected by the following rule:
Look for the BER measurement that produced no error, and that has the
biggest distance to a measurement with errors and select the Input Timing
setting that was used in this measurement.
Example: Input Timing Setting 2 has the biggest ‘distance’ to a setting that
produced errors, no matter if checking in ‘forward’ or ‘backward’ direction
through the table. So this is the setting that has to be used.
9 Solving Problems
482 Agilent J-BERT N4903B High-Performance Serial BERT