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ERROR CODE '625' ON MY HP 33120A

Discussion in 'General Technical Questions and Answers' started by K4LRH, Sep 13, 2019.

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  1. K4LRH

    K4LRH Ham Member QRZ Page

    Gents,

    I'm showing an error code '625' in my HP 33120A. I use it only for analog testing and repair. Do I need to be concerned about this error code ?

    Thanks,

    Jack; K4LrH
     
  2. KA5IPF

    KA5IPF Ham Member QRZ Page

    What does the book show that error code is for?
     
  3. W9GB

    W9GB Ham Member QRZ Page

    Agilent 33120A
    15 MHz Function / Arbitrary Waveform Generator
    User Guide (English, 312 pages)
    https://www.keysight.com/upload/cmc_upload/All/6C0633120A_USERSGUIDE_ENGLISH.pdf

    Chapter 5 : Error Messages (page 228)
    Self-Test Errors
    The following errors indicate failures that may occur during a Self-Test.
    Refer to the Service Guide for more information.
    ==
    Error 625 : I/O processor does not respond
    ==
    Agilent 33120A
    15 MHz Function / Arbitrary Waveform Generator
    Service Guide (English, 146 pages )
    https://ese.wustl.edu/undergraduate/Documents/lab_support/HP_33120A_Function_Generator_Service.pdf
     
  4. VK2TIL

    VK2TIL Ham Member QRZ Page

    As long as it's functioning it should be OK.

    Thanks to 'GB, the service manual may be consulted.

    On page 81, it tells us that Self-Test Error Message 625 is "I/O Processor Not Responding".

    The function of the I/O processor is described on page 85;

    "The ground reference section uses a processor configured as a slave to the
    main CPU. This processor establishes external I/O communication with
    the main CPU through a bi-directional, optically isolated, serial
    communications link. The earth referenced processor controls low-level
    GPIB (IEEE-488) and RS-232 interface operation. The ground referenced,
    rear panel external trigger input uses a dedicated optical isolator to
    couple a trigger signal to the main CPU in the floating section".


    You are most probably not using GPIB or the like so there should be no problem.
     
  5. K4LRH

    K4LRH Ham Member QRZ Page

    Thanks Guys.

    Jack
     

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