Per the Canada Flight Supplement, DME frequencies are paired to TACAN X and Y DME frequencies to allow DME receivers to use the DME functions of TACAN not co-located with a VOR. See below.
lionel wrote:
The certified DME receiver in your plane will take care of the part of TACAN that needs emitting.
You can’t tune a civilian DME to all TACAN channels. Those channels are missing from chflyer’s table.