QSFP-DD Passive Loopback Module ML4062 is used for testing QSFP-DD transceiver ports under board level tests. By substituting a full-featured QSFP-DD transceiver with the ML4062, the electrical loopback will provide a cost effective low loss method for QSFP-DD port testing.

The ML4062 is packaged in a standard MSA housing that is compatible with all QSFP-DD ports. Transmitting data from the host is electrically routed (internal to the loopback module) to receive data outputs and send them back to the host. It provides an economical way to exercise QSFP-DD ports during R&D validation, production testing, and field testing.The ML4062 provides 9 power classes using a customer supplied +3.3V voltage supply .