Member Since: January 6, 2010

Country: United States

  • Fluke indeed was the first to market with a yellow DMM. It was the 70 Series, introduced in the early 1980s.

  • Roughly 30 years ago, Fluke indeed came out with the first yellow handheld multimeter. (Their 70 Series, introduced in the early 1980s.) There were no yellow handheld multimeters before this time. If "multimeters have been yellow for as long as you can remember", then it is because your memory does not go back farther than 30 years.

  • The example code uses biphase coding to work across the asynchronous link. Is there any reason a standard UART could not be used to accomplish the same thing? It would need to be e.g. 115k baud to get above the receiver minimum freq spec. I see the receiver has an adaptive threshold mechanism - is it the purpose of the example code's preamble to allow time for the threshold to adapt?

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