1. An external system for communicating with an implantable cardioverter defibrillator (ICD), the ICD having a plurality of detection enhancement modules configured to perform detection enhancements being algorithms for detecting and analyzing indications of type of tachyarrhythmia, the external system comprising: a user interface configured to present a plurality of available classification modes and receive a user selection of a classification mode from the plurality of available classification modes, the available classification modes each specifying whether each detection enhancement module of the plurality of detection enhancement modules is to be activated or deactivated according to a pre-selected set of none, one, or more of the detection enhancements.