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What is the purpose of the ZINV pin on the AVR clock?

April 26, 2017avr clock Pin purpose

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What is the purpose of the ZINV pin on the AVR clock?

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The ZINV (Inverted Intensity) output on the AVR clock dims the beam at the appropriate moments. This output will increase its voltage towards 5V to decrease the scope intensity (Tektronix 400 scopes convention). Please connect this signal to your oscilloscope intensity control input, if present. It is very effective in suppressing highlighted dots on the screen.