Product Overview:

• Part Number 822-0615-305 is a RADIO ALTIMETER (ALT-4000) manufactured by Collins Aerospace.
• Low Range Radio Altimeter
• Form & fit replacements of discontinued ALT-50A/-55B (see P/N chart below for specific replacement information)
• Intended for single installations certified for Category II landings and for dual or triple installations in Category IIIa
• Measures radar height above terrain up to 2,500 feet
• Accurate to within two feet at the critical low altitudes
• Entirely digital, allowing for complete end-to-end monitoring
• Frequency-Modulated Continuous Wave (FMCW) technology
• Versions with analog outputs capable of driving existing indicators
• Analog outputs in ALT-55B or ARINC 552A format – strap selectable
• Four ARINC 429 digital buses
• Used with ANT-52 antennas
• Available with standard or shop-adjustable trips (see table below)
• Full temperature/altitude capability
• Stringent lightning and HIRF hardening
• Single unit packaged in a 3/8 ATR short-low package
• Package and aircraft mounting are identical to the ALT-55B
• Lightweight at 4.7 pounds with additional aircraft installation delay selections that can reduce antenna cable weight
• Front panel computer port for system configuration and access to system faults
• Computer interface that allows for flight simulation to aid checks of associated systems
• Versions compatible with Collins FPA-80 Flight Profile Advisory aural alert unit
• Versions available that directly plug in and replace the ALT-55B/-50A

Physical & Performance Specifications:

• Unit Size: 3.313″ H x 3.562″ W x 13.925″ D
• Unit Weight: 4.7 lbs
• Electrical Requirements: 28 ± 20% V DC, 16 W
• Altitude: 55000 ft
• Temperature Range: -55° to 70°C
• FAA TSO: C87
• EUROCAE: ED-14C
• Software: DO-178B Level A (critical)
• Center Frequency: 4300 ±15 MHz
• Altitude Outputs: Four isolated buses