User guide

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.

Error Ratio - Procedures

This section explains how to set up an Error Ratio.

Setting up Error Ratio

Follow the below steps to set up an Error Ratio:

Load the appropriate patterns in Pattern Generator and Error Detector. For more

information, see “User Patterns - Procedures” on page 71.

N O T E

Patterns with Invalid symbol(s) when loaded in ED display an error message.

However, if the same pattern in loaded in PG, the "8b10b Error" indicator turns red

and no error message is displayed.

Patterns with Illegal runing disparity when loaded in ED will turn the respective

symbol red when current running disparity is same as previous running disparity. If

same pattern is loaded in PG it will turn "8b10b Error" indicator red.

If you want to test your device in CDR mode, then set the Clock Data

Recovery (CDR) from the Clock Setup window. For more information, see

“Clock Setup - Procedures” on page 178.

From the main menu, choose ED Setup and then click Error Ratio from the list

of menu items.

This will launch Error Ratio window.

Setting up the Error Detector 5

Agilent J-BERT N4903B High-Performance Serial BERT 185