What signal level (in dBmV) is typically considered optimal for cable modem performance?

The signal level typically considered optimal for cable modem performance falls within the range of -15 dBmV to +10 dBmV. This range is acknowledged because it balances the need for a strong enough signal to ensure good data transfer rates and reliability, while preventing potential issues of signal overload or degradation that can occur at either extreme.

When the signal is above +10 dBmV, it can become too strong, leading to distortion or reflection, which negatively affects the modem's performance. Conversely, a signal that dips below -15 dBmV may result in inadequate signal strength, leading to poor performance, dropouts, or slower internet speeds.

Maintaining a signal within this optimal range is critical for ensuring stable connections, minimal packet loss, and efficient data transmission for cable modems in a typical home or office environment.