Applies to traditional signal generators using tunable oscillators, to synchronizers for use with these, and to synthesizers and sweep generators. Does not apply to pulse generators. Establishes the essential definitions; states the requirements intended for evaluating the electrical properties of signal generators; establishes a selection of standard performance characteristics from which the manufacturer shall or may state the requirements; specifies the tests for compliance. This publication supersedes IEC 60403 (1972), 60452 (1973), 60453 (1973) and 60592 (1978).