X channel | Article about x channel by The Free Dictionary
A DME (distance-measuring equipment) or a TACAN (tactical air navigational aid) channel paired with another radio service on the same frequency.
References in periodicals archive
The Dimension X Channel will be featured as "Hot" viewing on the Castanet Tuner.
As with all other emerging Castanet channels, the Dimension X Channel can be found on the Excite Channel Guide.