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Suddenly, I press the "mode" and "mode setup" of E4438C, the screen shows "options not installed" ? Just before the moment,they were work well.

Question asked by uesetc_ee on Oct 14, 2017
Latest reply on Dec 16, 2017 by Antonia Garcia

Suddenly, I press the "mode" and "mode setup" of E4438C, the screen shows "options not installed" ? Just before the moment,they were work well. And the result of instrument selftest are shown in the below figure.

selftest result

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