User guide

N O T E
The "Automatic" mode is selected by default for symbol alignment.
The "ReAlign" button is disabled in "Automatic" mode.
During the Jitter Tolerance Characterization/Compliance measurement, the
"Automatic" symbol alignment mode switches to "Manual" mode and restore back
to "Automatic" mode when the measurement is finished/aborted.
12
From the Sampling Point Setup window, set the sampling point. For more
information, see “Sampling Point Setup - Procedures” on page 196.
13
For SER as an error ratio mode, achieve the Symbol Lock condition. The
successful symbol alignment is indicated by a green Symb Lock indicator
present at the lower pane of the Serial BERT's GUI. For more information, see
“Symbol Lock Indicator” on page 192.
14
For "Bit Comparison without USB3.1 SKPOS" as an error ratio mode, achieve
the EIEOS alignment condition. The successful EIEOS alignment is indicated
by a green Symb Lock indicator present at the lower pane of the Serial BERT's
GUI. However, if the EIEOS alignment is lost or not done, the manual re-
alignment can be done by pressing "Re-Align" button as described in step 11.
N O T E
The "Bit Comparison without USB3.1 SKPOS" error ratio mode supports the bit rate
up to 10.35 Gbit/s. However, if you want to use bit rate greater than 10.35 Gbit/s
then switch to "8B/10B Symbol Comparison" or "Bit Comparison without PCIe3
SKPOS" error ratio mode and then go to "Bit Comparison" mode.
15
If required, use the Pattern Sync Setup dialog to synchronize the incoming
pattern to the expected pattern. For more information, see “Pattern
Synchronization - Procedures” on page 216.
Evaluating Results
The BER results can be viewed in the BER Results window. For more information,
refer “BER Results Window” on page 366.
The "8B/10B Symbol Comparison" results can be viewed in the Symbol
Comparison Results window. For more information, refer “8B/10B Comparison
Results Window” on page 367.
The "Bit Comparison without PCIe3 SKPOS" results can be viewed in the BER
Results window. For more information, refer “BER Results Window” on page
366.
The "Bit Comparison without USB3.1 SKPOS" results can be viewed in the BER
Results window. For more information, refer “BER Results Window” on page
366.
Setting up the Error Detector 5
Agilent J-BERT N4903B High-Performance Serial BERT 189