What Is Reference Test Cord?_
It connects test instruments to the link under test so that the measured loss reflects only the permanent cabling and connectors rather than the test setup itself. The cord must itself be verified as low-loss before use and is typically replaced when its own performance drifts. In practice it is mated once to the source or meter and then remains in place for the duration of a test sequence.
Technical Details
Reference cords are terminated with the same connector family as the link, commonly MPO for parallel optics or LC for duplex. They are used with an optical loss test set or OTDR in both one-jumper and three-jumper methods. The relevant standard or OEM procedure dictates the acceptable loss of the reference cord itself before measurements begin. Because the connectors are push-pull designs, no torque is applied during mating.
How Leviathan Systems Works with Reference Test Cord
Field crews use reference test cords when certifying MPO trunks that form the scale-out InfiniBand or Ethernet fabric between racks in large GPU clusters. The cords are part of the structured-cabling commissioning workflow performed after trunk installation and before GPU networking bring-up.
Related service
Structured Cabling Services →