The rows
Relative Time
and
Voltage
define the positions of the
measurement points. The last row shows the measured bit error rates
at these points.
•
The
Relative Time
of the measured points refers to the actual sampling
point. If synchronization and auto-alignment were successful, the
current sampling point is the optimum sampling point.
Instead of UI (one
Unit Interval
is equal to one system clock period),
the relative time can also be specified in seconds.
•
The
Voltage
is the decision threshold voltage at this measurement
point. The voltages of the measurement points can be set as absolute
voltages, as offset voltages, or as percentages. This is done on the
Parameters
page of the
Properties
dialog.
By default, the six measurement points are symmetrically placed, as
illustrated in the figure below:
These settings can be changed, and up to 32 measurement points can
be defined.
N O T E
Critical areas at the error detector are generally close to ±0.5 UI.
Advanced Analysis
5
Agilent J-BERT N4903 High-Performance Serial BERT
243
Summary of Contents for J-BERT N4903
Page 1: ...S Agilent J BERT N4903 High Performance Serial BERT User Guide s Agilent Technologies...
Page 68: ...2 Setting up Patterns 68 Agilent J BERT N4903 High Performance Serial BERT...
Page 158: ...4 Setting up the Error Detector 158 Agilent J BERT N4903 High Performance Serial BERT...
Page 314: ...6 Evaluating Results 314 Agilent J BERT N4903 High Performance Serial BERT...
Page 374: ...7 Jitter Tolerance Tests 374 Agilent J BERT N4903 High Performance Serial BERT...
Page 394: ...8 Solving Problems 394 Agilent J BERT N4903 High Performance Serial BERT...
Page 434: ...Index 434 Agilent J BERT N4903 High Performance Serial BERT...
