Product details

3BSE012869R1 Basic principle: The information in the computer is composed of "0" and "1" digital signals, and the transmission on the telephone line can only be analog electrical signals. Do not take any measures to use analog channels to transmit digital signals will inevitably have a lot of errors (distortion), so in the ordinary telephone network to transmit data, you must transform the digital signal to the original design of the telephone network required in the audio spectrum (that is, 300Hz-3400Hz).

Modulation is to use baseband pulse to control a certain parameter of the carrier waveform to form a signal suitable for line transmission.

Demodulation is when the modulated signal reaches the receiving end, the analog signal transformed by the modulator is restored to the original baseband digital signal by removing the carrier.

The use of modems can also convert audio signals into higher frequency signals and convert higher frequency signals into audio signals. Therefore, another purpose of modulation is to facilitate line multiplexing in order to improve line utilization.

Based on the three main parameters of the carrier signal, the modulation mode can be divided into three types: amplitude modulation, frequency modulation and phase modulation.

What does cable assembly mean？

Cable components mainly include wires, electromagnetic wires and insulated wires for motor appliances, power cables, communication cables and optical cables.Cable assemblies are materials used for power, communication and related transmission purposes.

There is no hard and fast line between "wire" and "cable."

Usually the products with fewer cores, small product diameter and simple structure are called wires, those without insulation are called wires, and others are called cables; The conductor with a larger cross-sectional area (greater than 6 square millimeters) is called a large wire, the smaller (less than or equal to 6 square millimeters) is called a small wire, and the insulated wire is also called a cloth wire. Cables include power cables, control cables, compensation cables, shielding cables, high temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, Marine cables and so on. They are composed of multiple strands of wire, used to connect circuits, electrical appliances, etc.

ABB series of products