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                    Firmware Update for Optimus/Optimus+ Sound Level Meters
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                    OLED Screen Degradation Information
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                    Powering the Optimus/Optimus+
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                    Changing the Time History Sampling Rate on your Optimus/Optimus+
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                    How to make a measurement with an Optimus+ Sound Level Meter
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                    Understanding Optimus/Optimus+ Product Codes
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                    Optimus/Optimus+ Screensaver and Display Power Saving Modes
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                    Troubleshooting USB Connectivity for Optimus/Optimus+
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                    I’m seeing the “preamplifier not fitted” message. What does this mean and how do I fix it?