6 responses to “EEVblog #422 – How To Calibrate A Calibrator”

• Analogue Man February 14th, 2013 at 20:53

  I worked for Datron/Wavetek in Norwich UK. I was involved in the development of the 4950 and many other instruments. Here’s the names of some of the design engineers…the ones whose names I remember. They deserve a mention…sorry if I missed anyone. They are some of the unsung heroes of metrology.

  Keith Bargroff-Chief Design eng.
  Martin Day-Analogue
  Howard Dawson-Analogue
  Phil Harbord-Analogue
  Geoff Brace-Software
  Newall White-Software
  Alistair Fields-Digital
  David Hetherington-Digital
  Robert Coggan-Former Chief Design eng.
  John Pickering (co founder and Analogue Designer)

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  • EEVblog February 15th, 2013 at 11:18

    Awesome, thanks for the list!

    Reply

  • Lelsie Green May 4th, 2013 at 21:09

    It was just Datron when I was there (1981 to 1985). I was working on the Datron 1081 DVM under the supervision of David Jessop, who was an analogue designer and project manager. It is my understanding that he was very influential in the development of the highly successful Datron 1061/1071 DVMs (which were developed before my time there). I particularly remember a conversation about the dither signal used to increase the resolution of the “ADC”. John Pickering had apparently wanted to use a noise signal (random dither) whereas David successfully argued that the dither signal should be coherent (systematic, synchronous).

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    • Leslie Green May 4th, 2013 at 21:12

      ok, I give in. Where’s the edit button? I evidently can’t even spell my own name correctly

      Reply

    • EEVblog May 6th, 2013 at 13:47

      Interesting. Yes, coherent dither seems a logical choice, with hindsight I guess?

      Reply

• Franck February 15th, 2013 at 09:53

  Hello,

  A good old databook with all the CMOS 4000 serie, with explanation, example of use.

  Franck

  Reply