The Marconi IFR Aeroflex ATC-601A Transponder Ramp Test Set is a portable test instrument for verification and certification of aircraft transponders operating in Mode S, A, and C. Designed for both bench and ramp operations, it delivers automated and manual testing sequences compliant with FAR Part 43 Appendix F and FAR 91.172. The AUTO TEST function executes comprehensive verification cycles with minimal operator intervention, while individual test selection supports diagnostic troubleshooting during scheduled maintenance.
Technical Specifications
Transponder Modes: Mode S, Mode A, Mode C
Regulatory Compliance: FAR Part 43 Appendix F; FAR 91.172
Signal Generation:
• Output frequency: 1030 MHz (DCXO controlled, ±10 kHz)
• Output level: −57 to −7 dBm into 50 Ω
• VSWR: 1.5:1
Receiver Sensitivity Measurement:
• Minimum Triggering Level (MTL): −67 to −79 dBm (direct connection); −69 to −77 dBm into 0 dBm antenna (−77 dB W/m² to −85 dB W/m²)
• Accuracy: ±2 dB
Reply Timing:
• Reply delay: 0.10 to 4.88 seconds (±10 ms accuracy)
• ATCRBS reply delay: 1.80 to 7.00 µs (±100 ns accuracy)
Pulse Parameters:
• Pulse widths (P1, P2, P3, intermode): 0.80 µs
• Phase modulation transition time: ≤80 ns
• Phase shift: 180° (±10°)
• Amplitude levels (SLS Level P2): −9 dB (±1 dB) and 0 dB relative to P1
Antenna System:
• Gain: 10 dB typical
• Range: 1.83 m to 91.44 m (6 ft to 300 ft)
• Tripod mountable directional antenna
– Key Features
• Automated test sequencing via AUTO TEST mode
• Individual test execution for fault isolation and diagnostics
• Flight ID and Tail Number decode capability
• UELM/DELM data link testing
• ADS-B/GICB testing to RTCA-DO260 and ICAO Annex 10 Vol 3 Chapter 5 standards
• Transmit frequency and power measurement
– Typical Applications
• Aircraft transponder certification and recertification
• Ramp inspections and maintenance verification
• Bench testing and periodic compliance audits
• Mode S, A, and C transponder diagnostics
– Compatibility & Integration
Complies with Federal Aviation Regulations for transponder testing. Supports enhanced surveillance formats and interoperability with Mode S and ADS-B equipped aircraft.
