A method is provided for managing multiple functions of a multi-channel SCSI chip. In an integrated circuit of the type comprising at least two power supply domains in which each power supply domain comprises at least one module powered by the same voltage level, the apparatus and method of the present invention blocks an output signal in a first power supply domain from being sent to a second power supply domain when the second power supply domain is in a low power mode. A dual-band antenna system for receiving radio signals includes an active Microstip Patch High Frequency circularly-polarized radiator disposed directly on a radiating patch of an active MP low-frequency radiator. Alternately or in combination with such orientation by landing gear, other portions of the aircraft including tilting rotors and tilting nacelles can be oriented to achieve a geometric configuration conducive to compact stowage.