SERIAL PREFIX: 1616A This section applies directly to Model 5305B 1300 MHz Counter having Serial Prefix 1616A. This section is provided in loose-leaf form for incorporation into the 5300 Measurement System Manual. 5305A instruments are documented in a separate manual. NEWER INSTRUMENTS This section with enclosed "Manual Changes" sheet applies directly to HP Model 5305B 1300 MHz Counter having Serial Prefix numbers above 1616A. OLDER INSTRUMENTS Subsection VII of this document contains information pertinent to all older instruments. This manual provides operating and service information for the Hewlett-Packard Model 5305B 1300 MHz Counter Information for the mainframes 5300A or 5300B) is contained in separate manuals. This manual is divided into eight sections containing the following information: SECTION 1 GENERAL INFORMATION covers a description of the Counter equipment supplied Accessories pecifications, and recommended test equipment. SECTION II INSTALLATION provides instructions for unpacking, inspection, preparation for use, shipment, and storage for the Counter ECTION III OPERATION covers the counter's operating features including front-panel controls, input level considerations, and operating and selfcheck procedures. SECTION IV THEORY OF OPERATION describes the counter's theory of operation. SECTION V MAINTENANCE contains an incabinet performance check, adjustments, and troubleshooting information. SECTION VI REPLACEABLE PARTS provides a complete list of the counter's replaceable parts and information for ordering parts. SECTION VII MANUAL CHANGES provides information necessary to backdate the manual to cover earlier instruments. SECTION VIII SCHEMATIC DIAGRAMS THEORY contains schematic diagrams, and component locators.