If a client experiences video dropouts, which item is best for evaluating the system?

When a client experiences video dropouts, utilizing a test pattern generator or HDCP generator is the most effective method for evaluating the video system. This device creates specific video patterns and signals which can help in diagnosing issues such as dropped frames, synchronization problems, or other anomalies in video playback. By generating a consistent signal, a technician can assess the quality of the transmission path, check for artifacts like jitter or interference, and determine if the display device is properly receiving and processing the incoming video signal.

Test pattern generators also allow the user to switch among various types of content and resolutions, providing a comprehensive assessment of the video system's reliability. This process can clarify whether the issues stem from the source, the cabling, the switching equipment, or the display itself.

In contrast, a spot photometer measures light levels but is not designed for evaluating video signals; it does not provide information about the integrity or quality of the video itself. An SPL meter measures sound pressure levels and is irrelevant to video issues. A tone generator produces audio signals and would not address visual dropout concerns. Therefore, the test pattern generator/HDCP generator is the most suitable tool for diagnosing video dropout problems effectively.