EADS North America Defense Test & Services (formaerly Racal Instruments) has designed, developed, integrated, tested & qualified Test Program Sets (TPS) for the UK Army's Challenger II Main Battle Tank (MBT).

These TPSs are designed to work with the British Army's General Purpose Digital Analog mobile and base workshops DIANA supplied and supported by Racal Instruments.

Racal developed the TPSs for electronic Line Replaceable Units (LRUs) fitted to the Challenger II including:

• Turret Distribution Box
• Stabilised Head Electronics Unit
• Power Converter Unit
• Display Unit
• Gunner's Display Monitor
• Commander's Primary Sight Electronics Unit
• Panoramic Traverse Amplifier PEC
• Head Traverse Amplifier PEC
• Elevation Amplifier PEC
• Analog Input / Output PEC
• Logic Input / Output PEC
• AC Supplies PEC
• DC Supplies Module
• Fire Control Panel
• Fire Control Computer
• Gun Control Processing Unit
• Digital Automotive System Control Unit