Barfield TT1200A, DFQ40K, DPS500 & 102-00876 | Avionics Test Equipment 27 May 2025 AvionTEq Blog Discover the Barfield TT1200A, DFQ40K, DPS500, and 102-00876—trusted tools in aviation testing. Learn how these precision instruments support your maintenance operations. Learn more. [More] Share