The Operating and Service ManuaI contains information required to install, operate, test, adjust, and service the Hewlett-Packard Model 3325A Synthesizer / Function Generator. The Operating Manual supplement is a copy of the first three sections of the Operating and Service Manual, plus the Operational Verification procedures from Section IV. The supplement should be kept with the instrument for use by the operator. The part numbers of both the Operating and Service Manual and the Operating Manual supplement are shown on the title pages.