The CTL-92 control is an electronic digital control unit that provides tuning and control of the Collins Pro Line II radios using CSDB digital data. The CTL-92 outputs serial data to tune the radio being controlled and receives serial data being returned from the radio. The CTL-92 scans operator controls and discrete inputs for frequency, mode data and operating configuration. The CTL-92 can be configured to accept serial tuning data supplied from an external system, but is designed for use with a TDR-94 and TDR-94D transponder in conjunction with the CAD-62 Control Adapter which converts serial tuning data to parallel tuning data. The CTL-92 may be used to control the original Pro Line ADF-60 and TDR-90 radios with the use of a CAD-62 Control Adapter as well. The CTL-92 provides nonvolatile storage of preset frequencies besides the active and preselect frequencies that are displayed. The CTL-92 serves only as a display unit and a means for transmitting the tune data to the radio. The display also shows diagnostic data received from the radio and allows for mode selection.

The CTL-92 is available in several different variations which include options between 28V and 5V lighting, a black or gray panel, compatibility with a Mode S transponder as well as relay control compatibility for applications where a relay is used to operate two transponders with only one antenna or encoder.