Quantum Data 801GC, 801GF, 801GX manual Programming

half the number of lines in one vertical period for interlaced formats. The current reference rate is marked with an asterisk.

The Horizontal Period is always equal to the sum of the Horizontal Active and the Horizontal Blank- ing times. The 801G* uses two of these parameters as references to calculate the third. The last two edited parameters will always be used as the references. The current references are marked with asterisks. The horizontal period, in microseconds, is the re- ciprocal of the horizontal rate. Entering a new real time value for the horizontal period will re-calcu- late the horizontal rate and make it the reference rate.

The Vertical Period is always equal to the sum of the Vertical Active and the Vertical Blanking peri- ods. For interlaced formats, these periods are for an entire frame (2 fields) of video. The 801G* uses two of these parameters as references to calculate the third. The last two edited parameters will always be used as the references. The current references are marked with asterisks. The vertical period, in milli- seconds, is the reciprocal of the frame rate. Entering a new real time value for the vertical period will re- calculate the vertical rate and make it the reference rate.

The horizontal and vertical Physical size parameters are the physical dimensions of the active video area of the display you will be driving with the format They do not affect the timing of any of the signals coming out the 801G* or the overall active video size of an image. However, they do affect the way some of the built-in test images will appear on the display’s screen. The 801G* uses this information to properly draw true circles and squares as well as brightness boxes that are supposed be specific physi- cal sizes. Using the wrong values may cause circles to look like ovals and square boxes to look like rect- angles.

6-12 Chapter 6: Programming Model 801GC, 801GF & 801GX¥Rev. A