The CTL-4000 control box gives you dedicated control of communication, navigation and surveillance Pro Line 21 and Pro Line II radios. It can be configured by pin strapping to provide either dual COM/NAV, ADF or XPDR control function. The CTL-4000 is ETSO and meets high levels of environmental qualification. The dual COM/NAV control takes up half the space and weighs less than other control boxes.
In dual COM/NAV configuration, a single CTL-4000 simultaneously controls: the NAV-4000, VIR-32 or VIR-432; the DME-4000, DME-42 or DME-442 (normal range plus extended frequency range); and the VHF-4000, VHF-22 or VHF-422 radio (normal range plus extended frequency range). In ADF configuration, the CTL-4000 controls the ADF-4000 and ADF-462 radios (normal range and extended frequency range). In XPDR configuration, the CTL-4000 controls a single TDR-94(D).