The Marconi IFR Aeroflex DT400 is an ARINC 429 databus analyzer designed for testing, simulation, and monitoring of avionics data communications. It verifies the integrity and performance of ARINC 429 interfaces within aerospace systems through dual receive and transmit ports, expandable to four each with an additional board.
– Technical Specifications
Receiver Operation
• Ports: 2 standard, expandable to 4
• Bus frequency: 12–14.5 kHz or 100 kHz (selectable)
• Input levels: ±6.5 VDC to ±13.5 VDC (A to B)
• Input impedance: 12.0 kΩ
• Word update rate: 1 ms to 10 seconds (selectable)
• Display formats: Engineering units with pre-stored scaling, hexadecimal, binary, user-defined, graphic plots, ASCII character
• Maximum words: 256 per SDI per channel
• Real-time download/conversion: RS-232C or 12-bit DAC port
Transmitter Operation
• Ports: 2 standard, expandable to 4
• Bus frequency: 12.0, 12.5, 14.5, or 100 kHz (selectable)
• Output levels: ±10.0 VDC (A to B)
• Output impedance: 75 Ω
• Word update rate: 1 ms to 10 seconds (selectable)
• Burst mode: 01–99 outputs at selectable rate
• Maximum words: 128 per channel (DT400H)
• Transmit word gap: 4 bits (DT400H)
• Dynamic transmit: Ramps and flat segments; levels programmable ±full scale; segment times 0–999.999 seconds (DT400H)
– Key Features
BITE Operation
• Displays ARINC 604 BITE messages
• Compatible with 737-300, 747-400, MD-11, A320/330/340 aircraft BITE concepts
• Supports 350/351 label maintenance bits with pre-stored text display
• Records up to 240 BITE screens for PC or printer download
Breakpoint & Recording
• Label sequence triggers: A, B, A or B, A then B, B then A
• Data conditions: EQ, NEQ, OR, GT, LT, /GT/, /LT/
• Event count: 1–99 programmable
• History storage: 24,540 words in programmable window with time stamps
• Trigger pulse: 5 V, 0.02 ms
• Record channels: Up to 16 selectable labels
Bus Monitoring
• Loss-of-word detection with selectable sensitivity
• Instantaneous, minimum, or maximum value display
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