Final answer:
A scan of the entire target of the vidicon tube is called a frame. When a high-precision monitor placed on its side experiences color changes and blurring, it is likely due to the interaction with the Earth's magnetic field, which affects the direction of the electron beams within the CRT.
Step-by-step explanation:
The scan of the entire target of the vidicon tube is called a frame. The vidicon tube is similar in function to the cathode ray tube (CRT), where an image is constructed through the deflection of electron beams. A frame represents one complete scan of the screen, which includes both the odd and even lines in the case of interlaced scanning, or every line in sequence for progressive scanning. This is part of how older TV monitors and oscilloscopes operated, displaying images by directing the accelerated electrons towards specific points on the screen using magnetic fields.
Regarding the issue of a high-precision TV monitor's image changing color and blurring when placed on its side, this could be related to the influence of the Earth's magnetic field. Since the Earth's magnetic field is omni-present, any significant change in the orientation of an electron beam device like a CRT could affect how the electron beams are steered, therefore distorting the image and altering the colors.