IBM CF Series manual

In detecting data, the system simply distinguishes between black and white or dark and light. The number of data samples taken per inch determines the resolution of the scan.

The data handling system also includes several data formats as an option. For example, RLE (Run-Length Encoded), Group 4, and Greensheet. The standard output format of scanned data is 8-bit gray scale or thresholded binary bit stream.

1.The Image Processor Board (IP) provides a Spatial Compressor function that allows the scanner to sample documents at variable frequencies through the electronics.

2.The Image Processor Board (IP) also provides an Adaptive Threshold function that provides several choices in setting the threshold value.

3.1.6 Display System (Optional)

A display monitor is an option to the scanner to allow you to view data as it is scanned. This is very helpful in setting thresholds and other scanning parameters. This option requires an additional board -- the Display Board.

1.The optional Display Board provides a Display Compressor function that buffers data and reduces the image resolution to match the video display.

2.The Display Board also acts as a Frame Grabber that structures the pixels to a format usable by the video display.

3.1.7 User Interface System

The SCAN-GRAPHICS CF Series Scanner may be controlled by the host computer or by the optional keypad mounted on the scanner. A combination of both is often used.

Another option for the system is a control terminal which provides a third means of system control and the only way to access the diagnostics program.

3.1.8 Power Supply System

1.The CF Series Scanner operates on 110 or 220 V.A.C. (determined at the time of purchase).

2.A circuit breaker on the rear panel provides protection on the A.C. input line.