Part #:

Model: ALT-4000

Collins Aerospace - Radio Altimeter Transceiver
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Part Number :


ALT-4000
FEATURES
      • 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 (ALT-1000 is intended for single installations in Category II ONLY)
      • 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
SPECIFICATIONS
FAA TSO: C87 Software: DO-178B Level A (critical)
Eurocae: ED-14C Environmental: DO-160C, /A2F2/BB/ CLMNY/E1XXXXXZ/ BZ/AZ/AZ/ Y/AZ/Z3Z3/XX
Dimensions: 3.313" H x 3.562" W x 13.925" L Weight: 4.7 lb
Cooling: No forced air required Temperature: -55°C to 70°C
Altitude: 55,000 ft. Power Req: 28 ± 20% V DC, 16 W
Center Freq: 4300 ±15 MHz RF Power Output: 350 mW nominal
Modulation: Selectable, 49, 50 or 51 Hz Linear FM Deviation: 100 MHz, nominal
Altitude Outputs: Four isolated buses Digital: Binary Label 164; BCD Label 165 per ARINC 429, 707
Analog: Two isolated outputs, strap selectable mode ARINC 552A Mode: -20 to +480 ft; 0.2 (h+20)Vdc +480 to +2,500ft; 10 + 10 In Vdc
ALT-55 Mode: -20 to +500ft; 0.02(h+20)Vdc System Accuracy: 500 to 2,500 ft ±3%
Output Loading: 20 standard loads per bus(digital); 1mS max (analog) Time constant: 0.09 ± 0.01s
Tripped Outputs: < +1.5Vdc @ 100mA max Untripped Outputs: < 20µA @ 30Vdc max
Factory Trip: -125: 200, 500, 1000, 1500ft (adj); -026: 200, 250, 1000, 1200ft (fixed); -206/306: 200, 250, 1000, 1200ft (adj) Delay (AID) Selections: 20, 26, 32, 40, 46, 52, 57, 63ft
Part NumberRad Alt Transceiver Description:
822-0615-125 Adjustable Trips, Analog out, Replaces ALT-55B -001/-011
822-0615-126 Fixed Trips, Analog out, Replaces ALT-55B -002/-012
822-0615-205 Fixed Trips, 429 out
822-0615-206 Adjustable Trips, 429 out
822-0615-305 Fixed Trips, 429 & Analog out
822-0615-306 Adjustable Trips, 429 & Analog out

 

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