What is a symptom of low modulation error ratio in a cable modem?

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A low modulation error ratio (MER) indicates that there are significant errors occurring during the modulation processes of a cable modem's signal. This often results in a reduction in the quality of data transmission. When the MER is low, the modem struggles to accurately interpret the signals it receives, leading to increased packet loss, errors, and interruptions in service, which ultimately degrades the user experience. Thus, the correct choice highlights the adverse effects of a suboptimal MER on data transmission quality, emphasizing the importance of maintaining a healthy MER for efficient communication in cable modems.