T I P
Press Apply if you want to keep the setting of frequencies for the current test run,
but if you still want to change the standard or BER specification. If all properties are
set as desired, press OK.
BER Specification
The
Target Bit Error Ratio
defines the pass/fail criteria of the jitter
tolerance compliance test. For every test point along the standard curve,
the test is failed if the measured BER lies above the
Target Bit Error
Ratio
.
The
Verification Method
defines under which circumstances the
measurement proceeds from one frequency to the next. You can choose
between two
Verification Methods
:
Setting a
Confidence Level
is generally recommended. This ensures that
neither too few nor too many bits are captured. See also
.
If you enable
Absolute Bits/Errors
, the measurement proceeds to the next
jitter frequency as soon as either the number of received bits or the
number of errors is reached.
N O T E
Ensure that you capture a number of bits that suffices to verify (with the desired
probability) that a measured point has a BER below the Target Bit Error Ratio.
The relax time allows the DUT to recover in case it has lost
synchronization due to an excessive high bit error rate. The next BER
measurement starts after this time has elapsed.
To run the Jitter measurements you need to make sure that Global Jitter,
Sinusoidal Jitter and Periodic Jitter are enabled.
This displays the list of measured points. The list classifies the points
with their frequency, amplitude, and status. The status indicates
whether the test passed or failed at that point.
This contains the results as follows:
1
Test Configuration Details
: gives the User Comments, Device Type,
Last Test Date, Model Number, Serial Number and Software Revision
number.
Jitter Tolerance Tests
7
Agilent J-BERT N4903 High-Performance Serial BERT
371
Target Bit Error Ratio
Confidence Level
Absolute Bits/Errors
Relax Time
Optimal Measurement Setup
Select Point
HTML Report
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...
