What is the SNR range for a cable modem?

The SNR, or Signal-to-Noise Ratio, is a critical measure that represents the level of the desired signal in comparison to background noise. For a cable modem, optimal performance is generally indicated by an SNR range between 35 to 45 dB. This range suggests that the modem is receiving a strong enough signal to maintain a reliable connection while also having sufficient margin to mitigate any potential noise that might impact signal quality.

An SNR in this range allows for stable data transmission and reduces the likelihood of errors occurring during data transfer. As SNR levels rise above 45 dB, while still indicating good signal quality, it may not represent the most typical or recommended operating parameters for standard consumer cable modem environments. Understanding SNR is crucial for diagnosing connection issues and determining whether a modem can effectively transmit data without interruptions.