A transmitter is a device or equipment designed to convert electrical signals into electromagnetic waves or signals suitable for transmission through air or a transmission medium. It plays a crucial role in various communication systems by modulating input signals on carrier waves using techniques such as amplitude modulation (AM), frequency modulation (FM) or phase modulation (PM). ). This process allows the transmission of information such as voice, video, data or other forms of signals over short or long distances.
Transmitters are integral components of radio broadcasting, television broadcasting, wireless telephony, radar systems, satellite communication and many other applications where wireless transmission of signals is required.
Transmitters are used primarily for communication purposes, allowing the wireless transmission of information across different locations. They convert electrical signals from input sources, such as microphones, cameras, data terminals or sensors, into electromagnetic waves or signals that propagate through air or a transmission medium.
This transmission capability supports a variety of applications, including radio and television, cellular networks, Wi-Fi systems, satellite communication, radar systems, remote sensing, and military communications.
By facilitating the broadcast of signals over the airwaves or through cables, transmitters enable real-time communication, data exchange and information dissemination in modern technological infrastructures.
In the context of programmable logic controllers (PLCs), a transmitter refers to a device that measures and transmits process variables such as temperature, pressure, flow, level, or other parameters of the PLC system.
These transmitters convert analog signals from sensors or measuring devices into standardized electrical signals, such as 4-20 mA current loops or digital signals compatible with PLC input modules. By transmitting accurate and reliable data on process conditions, PLC transmitters enable monitoring, control and automation of industrial processes.
They play an essential role in industries such as manufacturing, oil and gas, chemical processing, power generation and water treatment, where precise measurement and control of process variables is essential to operational efficiency and safety.
An example transmitter includes various devices used in everyday communication and industrial applications. For example, a radio transmitter is used in broadcast stations to convert audio signals into radio waves for transmission over the airwaves into radios.
In wireless communication, a cellular transmitter converts voice or data signals into radio waves that are transmitted between mobile phones and cell towers. In industrial settings, pressure transmitters measure pressure levels in pipes or vessels and transmit this data to control systems for monitoring and adjustment. These examples illustrate the various applications and functionalities of transmitters in different industries and technology areas.
Transmitters and receivers are complementary components in communication systems that work together to establish two-way communication links.
A transmitter converts electrical signals into electromagnetic waves or signals suitable for transmission, while a receiver captures, demodulates and decodes these signals to recover the original information. This reciprocal process allows the transmission and reception of information between communication endpoints such as mobile phones, broadcast stations, satellites and data networks. Transmitters and receivers are fundamental to telecommunications, broadcasting, navigation systems, wireless networks and other applications requiring reliable and efficient data transmission and reception