Either positive or negative video output is available for trouble-shooting video circuits, and may be adjusted with the video level control. This control also varies the R.F. modulation which provides a check of color hue and sync with different signal levels. These pulses provide the necessary blanking and lock the various patterns firmly on the screen, without jitter or crawl. The user, therefore, may be assured that color receivers converged with the CD-1 will still be converged properly on a television program from a station. Self-contained sync pulses also eliminate the need for any bothersome external sync leads, and any one of the six available patterns may be selected with one switch, without any further adjustment to the generator or receiver.
Dots are small sized and sharply defined, and are fixed as to size and number.
The height and width of the raster may be determined by counting the fixed number of bars. Horizontal and vertical bar patterns are also available for convergence adjustments. The CD-1 is compact, light in weight, and has smooth control action. The 13 tube circuit has been carefully laid out to allow ease of assembly. Easy to follow calibration instructions are furnished with actual oscilloscope patterns to aid in alignment.