Block 12

Translates air pressure into height above sea level. NOT a good indicator of aircraft altitude when flying over land.

• Radar Altimeter

• Aneroid Altimeter

• Altimeter

• Distance Altimeter

Uses transmitted radio waves to measure aircraft height above the Earth’s terrain. The most accurate means of measuring

• Radar Altimeter

• Aneroid Altimeter

• Altimeter

• Earth's Terrain

The Formula for Radar Altimeter

• Time=(Distance)(Distance)

• Constant=(Distance)(Time)

• Time= (Distance)(Constant)

• Distance = (Time)(Constant) 984 ft/microsecond

Frequency Range for CARA

• 4.3GHz ± 50 MHz (4.25 to 4.35 GHz)

• -113.7 dBm

• 1800 Knots

• 5 Seconds

Warm Up Time for Cara

• 3 Seconds

• 7 Seconds

• 5 Seconds

• 6 Seconds

Power Requirements for CARA

• 26 VDC

• 26 VAC

• 28 VDC

• 28 VAC

Output Power of CARA

• -113.7 dBm

• 1800 Knots

• One Watt Maximum, Controlled at 10 dB above receiver noise.

• Two Watt Maximum

Major Components of CARA

• RT and Height Indicator

• RT and ADI

• ADI and Height Indicator

• BDHI and ADI

CARA Receiver/Transmitter

• ·       Provides both analog or digital data for display.

• ·       Aircraft Installation Delay (AID) adjustment.

• ·       Displays both analog and digital information provided from the R/T

• Supplies a warning signal to the voice warning generator when aircraft altitude falls

CARA Height Indicator

• ·       Displays both analog and digital information provided from the R/T

• ·       Supplies a warning signal to the voice warning generator when aircraft altitude falls below preset level.

• ·       Contains all the operating controls for the system/ circuitry necessary for operating the system.

• ·       - Converts analog altitude data for use by other aircraft systems. 26 VAC.