In a raster scan RADAR display showing a missing video block, where is the most likely problem area?

In a raster scan RADAR display, a missing video block typically indicates an issue in the signal processing or data handling associated with the display of information. The memory area is critical in this context, as it is responsible for storing and retrieving the video data that ultimately forms the image on the display. If there is a failure in the memory area, it can lead to missing information for specific regions of the display, resulting in a visual artifact such as a missing video block.

When the memory is compromised, the system may not be able to access or properly display the data corresponding to certain parts of the image, leading to gaps or missing blocks. This highlights the importance of memory integrity in maintaining the continuity and completeness of the displayed information. Other components like the horizontal sweep circuit, power supply, and vertical blanking pulse are crucial for the overall functioning of the RADAR display, but they typically affect the display in different ways, such as causing distortion, flickering, or complete loss of the display, rather than specifically resulting in localized missing video blocks.