Definition[edit | edit source] Fidelity is “ [t]he degree of accuracy with which a system (or portion of a system), reproduces in its output the essential characteristics of the signal which is impressed on its input.[1] ” References[edit | edit source] ↑ Glossary of Communications-Electronics Terms, at 2-69. Categories: Definition Data Telecommunications Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.