Aeroflex IFR S-1403C Mode S Auxiliary Accessory for ATC-1400A

The Aeroflex IFR S-1403C Mode S Auxiliary Accessory augments the ATC-1400A Transponder/DME Test Set with dedicated Mode S transponder testing capabilities. This accessory simulates a Secondary Surveillance Radar (SSR) ground station, enabling verification of Mode S identity, altitude, and data link operations essential for modern avionics certification and maintenance.

– Technical Specifications

Compatibility & Interface
• Connects to the ATC-1400A via dedicated bus systems using specified cables
• Supports remote operation via IEEE 488.2-1987 or RS-232 interfaces
• Operates as a stand-alone unit for limited Mode S testing

Mode S Testing Capabilities
• Supports All Call Short (ACS), All Call Long (ACL), Interlacing Mode S with ATC, Double Interrogation (DI), and Burst Test functions
• Interrogation rates up to 2500 PRF burst
• Interlacing Mode S interrogations with fixed delay following P1
• Double interrogation modes in any combination of ATCRBS, All-Call, and Mode S
• Control of P2, P3, P4, and P6 pulse width, offset, and amplitude
• Fixed frequency/fixed level RF output for diversity antenna testing

Signal Generation
• Pulse and Differential Phase Shift Keying (DPSK) modulated signal output
• Optional Multi-Level Diversity (MLD) function for Mode S transponders with MLD requirements

– Key Features

• Simulates ATCRBS/Mode S-equipped SSR ground station operations
• Verifies Mode S transponder identity, altitude, and data link functions
• Optional MLD pulse code modulation per RTCA/DO-181 specifications
• Backward compatible successor model (S-1403DL) supports extended DF17 squitters and Mode S data link/ADS-B capabilities
• Existing ATE programs developed for the S-1403C operate on the S-1403DL without modification

– Typical Applications

• Mode S transponder certification and acceptance testing
• ATCRBS and Mode S interrogation response verification
• Diversity antenna testing with fixed RF output
• Double interrogation mode validation
• Data link operation verification

– Compatibility & Integration

Designed exclusively for integration with the Aeroflex IFR ATC-1400A platform via dedicated bus architecture. The successor S-1403DL model maintains full backward compatibility with existing S-1403C test programs.