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Agilent 1820-2101 for 8643A signal generator

Discussion in 'Electronic Equipment' started by JW, Jun 3, 2011.

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  1. JW

    JW Guest

    Looking to buy a replacement part to repair an Agilent 8643A signal
    generator. It's an ECL divide-by-2 device. Would like to get the original
    part if anyone has one they'd like to sell, but even substitute parts
    suggestions would be very welcome.

    Part Number: 1820-2101
    Description: IC Divider ECL Binary 4-metal Package

    Other equipment where part is used according to Agilent:
    * 5355A
    * 8643A
    * 8644B
    * 8645A
    * 8664A
    * 8665A
    * 8665B
    * E5501A
    * E5501B
    * E5502B
    * E5503A
    * E5503B
    * E5504A
    * E5504B

    I've posted a schematic of the particular circuit in
    Subject: Agilent 1820-2101 for 8643A signal generator -
    8643A-divide-by-2.jpg (1/1)
    Date: Fri, 03 Jun 2011 06:16:20 -0400
    Message-ID: <>

    U15 is the defective part. The schematic does not show the GND connection,
    but the case is GND. The package style is similar to TO-39. It's expected
    frequency input at J3 is 520MHz to 1030MHz.

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