The Aeroflex IFR S-1403DL-MLD is a Mode S accessory that extends the ATC-1400A Transponder/DME Test Set with advanced Secondary Surveillance Radar (SSR) simulation capability. This unit generates ATCRBS and Mode S interrogation signals, supporting Data Link, ADS-B (extended DF17 squitter), and Multi Level Diversity (MLD) requirements per RTCA/DO-181. The accessory delivers pulse and Differential Phase Shift Keying (DPSK) modulated RF signals for exhaustive transponder validation across legacy and modern avionics architectures.
Technical Specifications
Signal Generation & Modulation
• Pulse and DPSK modulated signal generation
• Mode S interrogation rates up to 2500 PRF burst
• PRF generator ranges from 99.999 seconds to 2500 Hz
• P2, P3, P4, and P6 pulse width, offset, and amplitude control
• Fixed frequency/fixed level RF output for diversity antenna testing
Memory & Firmware
• Flash memory for firmware upgrades
• Battery back-up memory for test data storage
Data Formats & Operation
• MTL, Comm C, and Comm D format support
• Over 30 configuration screens
• Rapid data field updating via SLEW knob or keypad
• Stand-alone Mode S testing capability
Interfaces & Control
• IEEE 488.2-1987 and RS-232 remote operation
• Two 25-way interconnect cables (Aeroflex and AUX buses)
• Three SMB-to-SMB coaxial cables for RF connections
Power & Safety
• Installation Category I or II supply operation
• EN 61010-1:1993 compliance (Class 1, Pollution Degree 2)
• Line power switched for synchronized ATC-1400A power-up
– Key Features
• Backward compatible with S-1403C model—existing ATE programs run without modification
• Comprehensive transponder testing: ATCRBS, Mode S, All-Call, and Data Link variants
• Standalone operation for field-portable Mode S validation
• Ground station simulation with advanced data link capabilities
– Typical Applications
Mode S transponder validation, ADS-B system testing, ATCRBS backward compatibility verification, Multi Level Diversity antenna testing, and avionics production acceptance testing.
– Compatibility & Integration
Designed as a primary accessory to the Aeroflex ATC-1400A. Interfaces via dual 25-way interconnect cables and coaxial RF distribution.
