Service Manuals, User Guides, Schematic Diagrams or docs for : Agilent journals 1962-09

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                                                     HEWLETT-PACKARD

                                               JOURNAL
                                               T E C H N I C A L   I N F O R M A T I O N   F R O M   T H E   - h p -   L A B O R A T O R I E S
                                                                                                                                                                                 Vol. 14, No. 1

PUBLISHED BY THE HEWLETT-PACKARD COMPANY, 1501 PAGE MILL ROAD, PALO ALTO, CALIFORNIA                                                                                         SEPTEMBER, 1962




                                                  A New Generation of
                                            High-Speed Frequency Counters
         A LITTLE over a decade ago the Hewlett-                                             Figs. 3 and 4. One of the new counters measures
       J- A- Packard Company introduced what subse                                           from 0 cps to 20 megacycles and the second
       quently proved to be one of the electronics                                           from 0 cps to 50 megacycles. Using a plug-in,
       field's most important measuring instruments.                                         each counter will measure to 500+ megacycles.
       This was the high-speed frequency counter, the                                        Both counters have a large, in-line readout and
       now well-known -hp- Model 524*. This counter                                          high input sensitivity. They are transistorized
       automatically measured frequencies up to 10                                           and use computer-type construction, giving a
       megacycles and did so with an accuracy superior                                       small physical size with a panel height of only
       to that of any but the most elaborate methods                                         5 i". A full array of plug- ins has been designed
       of the time. During the ensuing decade, its all-                                      to be compatible with this small panel size, as
       around capabilities brought this counter to the                                       described later. Except for their different maxi
       stature of an instrument accepted by all as the                                       mum counting rates of 20 and 50 Me, the two
       standard of the industry.                                                             counters have essentially the same electrical
          Advances in the art have now permitted the                                         and mechanical characteristics and use the
       development of a new generation of two high                                           *A. S. Bagley, "The High-Speed Frequency Counter 

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