The most common cause for the error message "Set Reference Failed Due To Calibration Error" is a fault with the permanent link adapter that is being used for the reference.
If you get this error, you can try using a different permanent link (DSX-PLA004 or DSX-PLA804) adapter for the reference process - however, if both adapters have similar usage, you may get the same error.
You can check the usage of an adapter by navigating to [Tools] > [Version Information] > [Adapter] while having an adapter attached to the Versiv mainframe.
The "Autotest count" is a record of the number of tests that have been run with the adapter. Permanent link adapters are rated for up to 5.000 insertions, however, the lifespan may be shorter or longer depending on how they are treated.
Additionally, you can try disconnecting, swapping positions, and reconnecting the adapters between the Versiv Main and Remote units. You can also do the same process with the DSX modules. In some cases, simply reseating these connections can help.
*Please note that a reference must be performed with one DSX-PLA adapter and one corresponding DSX-CHA adapter of equal level, e.g. you cannot reference with a DSX-PLA804 and a DSX-CHA004 together or vice versa, they must both be 004 (CAT6A) or both 804 (CAT8). Additionally, DSX-8000 can reference and test with either 804 adapters or 004 adapters, but DSX-5000 can only use the 004 adapters.