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EIP 545A Frequency Counter Questions

Discussion in 'Electronic Equipment' started by Jim Flanagan, Jun 17, 2007.

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  1. Jim Flanagan

    Jim Flanagan Guest

    I am trying to track down some information on the different
    firmware versions of this counter. I own one that came without
    the GPIB option. I have since found the GPIB plug in board, but
    am confused in regards to the firmware. I have two manuals for
    the 545, one printed around 1980 and one around 1987. There was
    a change in the CPU card between these dates. The manuals also
    seem to have a number of misprints or anomalies as far as the
    firmware required for the GPIB opt.

    Does anyone know much about these counters and have any knowledge as
    to the proper firmware required for the GPIB option? Also, will the
    will the newer CPU cards work in place of the older cards and vice versa??

    Any information that you can provide would be appreciated.

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