Lane BERT

 

The Lane BERT test is used for validating the physical interface of the optical module (QSFP28-DD, QSFP28, QSFP+). It helps verify the performance and integrity of the optical module by checking bit error and BER per optical lane frequency offset measurement per lane. The rates supported are dependent on the optical module capabilities.

 

Lane BERT Setup

 

In newer test sets, the unit will be able to toggle between single frequency or per lane frequency measurements.

 

Lane BERT Setup Per Lane

 

  1. Select the test rate and test pattern. The same test pattern can be configured for all lanes or a different test pattern can be configured per lane.

  2. Press TX Start, then press Start.

 

The options to set PRBS patterns per lane or for all lanes is available in newer 40G/100G/400G modules, depending on the test set and software version.