Employing digital signal processing technology and a modular design, the TDR9000 completely tests Circuit Breakers of various types, models and manufacturers. This unmatched modular design allows a user to acquire a Circuit Breaker Test System matched to today's specific testing applications. Additionally, TDR9000's modular design permits easy upgrades in the field to expand its systems capabilities should the user encounter the need to test different or more complex apparatus. TDR9000's modular design results in complete usage of its capital investment and simultaneously provides an upgrade path to test future breaker designs and applications. Packaged in a compact, portable and sturdy case, TDR9000 is the single-box solution for Circuit Breaker Testing.