An audio/video content receiver configured to receive media content from a content source by a broadcast data path, the media content being arranged as a plurality of media channels, the content receiver comprising: a host module having a tuner configured to assign logical channel indices to the media channels to allow selection, at the host module, of one or more of the media channels for reproduction by selecting the corresponding logical channel index, the host module storing channel association data associating the logical channel indices with the received media channels; a removable conditional access module CAM (30, 50), the CAM having an access control unit for decoding access-controlled encoded broadcast content, the host module and the CAM being arranged to provide an encrypted communication link for decoded access-controlled encoded broadcast content between the CAM and the host module; in which: the host module is configured to acquire channel association data via the broadcast data path; the CAM is configured to provide further channel association data to the host module; the host module comprises a detector configured to detect a conflict of logical channel index between the channel association data acquired by the host from the broadcast data path and the channel association data provided by the CAM and, in the case of a conflict, to detect one or more unused logical channel indices; and the CAM is configured to select one of the unused logical channel indices for use by a media channel for which the logical channel index defined in the CAM's channel association data conflicts with a logical channel index defined in the host's channel association data. a host module having a tuner configured to assign logical channel indices to the media channels to allow selection, at the host module, of one or more of the media channels for reproduction by selecting the corresponding logical channel index, the host module storing channel association data associating the logical channel indices with the received media channels; a removable conditional access module CAM (30, 50), the CAM having an access control unit for decoding access-controlled encoded broadcast content, the host module and the CAM being arranged to provide an encrypted communication link for decoded access-controlled encoded broadcast content between the CAM and the host module; in which: the host module is configured to acquire channel association data via the broadcast data path; the CAM is configured to provide further channel association data to the host module; the host module comprises a detector configured to detect a conflict of logical channel index between the channel association data acquired by the host from the broadcast data path and the channel association data provided by the CAM and, in the case of a conflict, to detect one or more unused logical channel indices; and the CAM is configured to select one of the unused logical channel indices for use by a media channel for which the logical channel index defined in the CAM's channel association data conflicts with a logical channel index defined in the host's channel association data. the host module is configured to acquire channel association data via the broadcast data path; the CAM is configured to provide further channel association data to the host module; the host module comprises a detector configured to detect a conflict of logical channel index between the channel association data acquired by the host from the broadcast data path and the channel association data provided by the CAM and, in the case of a conflict, to detect one or more unused logical channel indices; and the CAM is configured to select one of the unused logical channel indices for use by a media channel for which the logical channel index defined in the CAM's channel association data conflicts with a logical channel index defined in the host's channel association data.