The Equalizer was an American crime drama television series, originally airing on CBS from 1985 until 1989. It starred the late Edward Woodward as a retired espionage/intelligence officer with a mysterious past, who uses the skills from his former career to exact vigilante justice on behalf of innocent people who are hopelessly trapped in dangerous circumstances.
Runtime: 60 minutes
The Equalizer - Equalization (communications) - Netflix
In telecommunication, equalization is the reversal of distortion incurred by a signal transmitted through a channel. Equalizers are used to render the frequency response—for instance of a telephone line—flat from end-to-end. When a channel has been equalized the frequency domain attributes of the signal at the input are faithfully reproduced at the output. Telephones, DSL lines and television cables use equalizers to prepare data signals for transmission. Equalizers are critical to the successful operation of electronic systems such as analog broadcast television. In this application the actual waveform of the transmitted signal must be preserved, not just its frequency content. Equalizing filters must cancel out any group delay and phase delay between different frequency components.
The Equalizer - Digital telecommunications - Netflix
Modern digital telephone systems have less trouble in the voice frequency range as only the local line to the subscriber now remains in analog format, but DSL circuits operating in the MHz range on those same wires may suffer severe attenuation distortion, which is dealt with by automatic equalization or by abandoning the worst frequencies. Picturephone circuits also had equalizers. In digital communications, the equalizer's purpose is to reduce intersymbol interference to allow recovery of the transmit symbols. It may be a simple linear filter or a complex algorithm.
The Equalizer - References - Netflix