The Power ON Setting panel provides the microscopist with an option to configure up to three initial environments for the DN 100 camera control unit. After a custom environment has been configured and saved in the Power ON Setting panel, the operator may easily select it for use from the MAIN menu.

When configuration parameters are changed using the various buttons on the Power ON setting panel, the result will be reflected in the active configuration and will automatically be applied to the Sample Image appearing in the setting panel window (Figure 1). The name of each configuration option in the setting panel is listed in a column on the left side of the panel. To the right of each feature name appears a single button or pair of buttons, with the current value of the button(s) written in green text in another column on the right-hand side of the buttons. In cases where two buttons are provided, the left-hand button will decrease the indicated value, and the right-hand button will increase the indicated value. The functions of the Power On Setting panel features are outlined in greater detail below (refer to Figure 1 for location of adjustable parameters in the setting panel).

• Custom No. - The Custom No. button enables the operator to toggle between the currently saved custom hardware configurations (up to three configurations may be saved by the software). Any changes made to a configuration setting will be stored in under the displayed configuration number indicated in this column.
• AE Mode - The AE Mode button changes the exposure mode for the active configuration. Each of the four available exposure modes is described in the Exposure Control and Camera Sensitivity section. The settings of each of the four exposure modes from the Power On Setting panel are summarized below:

• Program AE (program AE mode) - In this mode, the Compensation buttons (Figure 2) can be used to change the exposure compensation over a range from -2.0 EV to +2.0 EV in 0.3 EV steps.

• Speed AE (shutter speed priority AE mode) - In the shutter speed priority mode, the Speed buttons (illustrated in Figure 3) can be used to set the shutter speed over a range of 1/1000 second to 4 seconds. The Compensation buttons (Figure 3) can also be used to change the exposure compensation between a range of -2.0 EV to +2.0 EV in 0.3 EV steps.

• Manual (manual exposure mode) - The Speed buttons (Figure 4) can be utilized in the manual exposure mode to set the shutter speed over a range from 1/1000 second to 60 seconds. The Analog Gain buttons (Figure 4) may then be used to set the camera gain over a range from x1 (AG value of 100) to x46 (AG value of 4600).

• Focus AE (focus priority exposure mode) - In a manner similar to that of the program AE mode, the focus priority mode utilizes the Compensation buttons (Figure 5) to change the exposure compensation over a range from -2.0 EV to +2.0 EV in 0.3 EV steps.

• White Balance - The White Balance button directs the software to perform a white balance adjustment on the digital image. Details of the white balance setting are described in the White Balance Calibration section.
• Noise Reduction - Clicking the Noise Reduction button toggles the noise reduction feature on and off. Noise Reduction is discussed in the Image Correction Features section.
• Shading - The amount of shading compensation for the current configuration can be selected with the Shading button. Shading compensation is discussed in the Image Correction Features section.
• Tone - The Tone button controls the image tone or gamma value. Five settings are available: 1. Low, 2. Mid, 3. High, 4. Linear, and 5. Enhance. A thorough description of the tone controls and how they affect the appearance of the displayed image is discussed in the Image Correction Features section.
• Gain - The Gain buttons enable the operator to adjust the output image gain (brightness).
• Color Mode - Clicking the Color Mode button toggles the color balance mode between Gain and Matrix. An explanation of these modes is provided in the Image Correction Features section.
• Color Balance - These buttons allow the user to adjust RGB color-balance in the digital image. The manner in which color-balance settings affect the appearance of the displayed image is discussed in the Image Correction Features section.
• Sharpness - Image sharpness can be adjusted between six available levels with these control buttons. The effects of image sharpness setting values on the appearance of the displayed image is discussed in the Image Correction Features section.

• Mirror (Vertical) - The vertical mirroring utility enables the operator to vertically flip the output digital image (mirroring), as illustrated in Figure 6 for a multiply stained thin section of potato.
• SXGA/XGA - Clicking this button toggles between SXGA and XGA display modes.