A television signal originates from a transmitter that sends information from an audio and visual source to an amplifier or repeater to the digital receiver of an A/V device, such as a television. The ...

While strength is often visually represented in the form of cones, bars, or dots, it’s really calculated in the form of decibels per milliwatt, or dBm. A perfect signal is -30dBm, which you’ll ...

You can easily check your Wi-Fi signal's strength, right down to the exact dBm levels, on a Mac or PC computer.

Windows: You’ve seen the dreaded bars before—that fun little graphic that indicates the strength of your wireless connection. While full bars mean you’re probably getting good wifi speed, you’ve also ...

If you're measuring your cellphone signal by eyeballing the little dots in the top-left hand of your iPhone's display, then you're really missing out on a cool feature by not using the built-in Field ...