encoding altimeter

encoding altimeter

encoding altimeterclick for a larger image
An encoded altimeter transmits the aircraft altitude to the radar of the attached radar beacon system. It essentially consists of an encoding disc which rotates as per altimeter reading. This rotation of the disc is sensed by photo cells. These digital signals are amplified and transmitted. The transponder receives these as pressure altitude. The computer converts these signals on the basis of local altimeter setting. This ensures that there is uniform information in respect of all aircraft in the region.
The normal altimeter but with the additional capability for sending digitalized output to the transponder for transmission to ATC (air traffic control). The encoding altimeter, in conjunction with a transponder, transmits the aircraft altitude in hundreds of ft to the radar of the air traffic control radar beacon system.
References in periodicals archive ?
The AAU/32A encoding altimeter provides indication of aircraft altitude to the cockpit as well as the aircraft transponder for tower and ground altitude reporting.
The contract is to supply AAU/32A Encoding Altimeters used on the UH60 Blackhawk and OH58 Helicopter Fleet.