Honeywell 1900GHD-2 User Guide - Page 209

E - Exposure Exposure is used in Manual Style only (2P), and allows you to set the exposure time. This is similar to setting a shutter speed on a camera. The exposure time determines how long the scanner takes to record an image. On a bright day, exposure times can be very short because plenty of light is available to help record an image. At nighttime, exposure time can increase dramatically due to the near absence of light. Units are 127 microseconds. (Default = 7874) nE Range: 1 - 7874 Example of Exposure at 7874E with Example of Exposure at 100E with fluorescent lighting: fluorescent lighting: G - Gain Gain is used in Manual Style only (2P). Like a volume control, the gain modifier boosts the signal and multiplies the pixel value. As you increase the gain, the noise in an image is also amplified. 1G No gain (default) 2G Medium gain 4G Heavy gain 8G Maximum gain Example of Gain at 1G: Example of Gain at 4G: Example of Gain at 8G: 8 - 3