ESA Certified Alarm Technician Practice Exam

What is the key drawback of using analog video?

1. Low storage capacity

2. Inconsistent image quality

3. Limited transmission distance

4. Image degradation over time

The correct answer is: Image degradation over time

The key drawback of using analog video is the issue of image degradation over time. Analog video signals can experience a decline in quality due to factors such as interference, signal attenuation, and the physical deterioration of the medium through which the signal is transmitted (for example, coaxial cables). Over extended periods, the quality of the video can diminish, making it challenging to maintain clear and stable images, especially in comparison to digital video systems that maintain their quality over time due to the way they encode and transmit data. While analog systems may have limitations related to storage capacity, image quality variability, and transmission distance, these factors do not present the same critical long-term structural integrity issue that image degradation does. Understanding this drawback is crucial for technicians when considering video surveillance options, as it directly impacts the reliability and usability of the footage captured over time.