自上而下的测试理念（Top-Down Analysis）

1. Antenna System

• Gain
• Tilt
• Alignment
• Polarisation
• Reflections
• RF properties

2. Transmission

• Rf: Cables, waveguides, rotary joint, couplers loss, phase matching, directionality, VSWR and coupling
• Mechanical: Encoder, turning gear, ACP and ARP errors, stability and windload

3. Interrogator

• Transmitter: Power, pulse , shape, power drop, PRF, stagger and mode
• Receiver: Sensitivity, bandwidth, channel alignment saturation, STC, monopulse accuracy

4. Processor

• Accuracy, Degarbling, Load, Delay, Resolution, code validation
• False plot generation, Probability of detection

5. Transponder

• Classification
• Monitoring
• Fault finding

6. Environment

• Other interrogators
• FRUIT
• Load
• ACAS
• ADS-B