Powerful 800G testing with real traffic
EXFO’s BA-4000-L2 is a combined layer 1 BER tester and Ethernet (L2) traffic analyzer for 800G transceivers, including 800G DR4/FR4/LR4, DCO and LPO transceivers. The solution includes FEC testing (including FEC statistics), burst error detection and BER calculated from host to end for the industry’s most reliable measure of error when testing optical transceivers, including LPO devices.




Superior hardware design
Native electrical interface
Excellent signal quality
Clean eye diagram
Low error floor
Discover the BA-4000-L2
The BA-4000-L2, delivers a layer 2 framed signal to validate segmented FEC (DCO) and 200G per lane optic transceivers. Plus, its powerful equalizer and channel simulator are ideal for LPO testing.
Watch this short video introduction by EXFO’s Andrea Guglierame to learn more.

Discover the BA-4000-L2
The BA-4000-L2, delivers a layer 2 framed signal to validate segmented FEC (DCO) and 200G per lane optic transceivers. Plus, its powerful equalizer and channel simulator are ideal for LPO testing.
Watch this short video introduction by EXFO’s Andrea Guglierame to learn more.

Segmented FEC (DCO) and concatenated FEC (200G/lanes) architectures require L2 framed traffic
In the latest generation of optics and transceivers, the forward error correction (FEC) encoding and decoding function is moving from the host side to within the optical transceiver. With this evolution in functionality, transceivers are no longer agnostic electrical-to-optical converters and therefore FEC testing is required for applicable transceivers. The BA-4000-L2 delivers a layer 2 framed signal to validate DCO and 200G per lane optical transceivers.
