This section provides an overview for modulators as well as their applications and principles. Also, please take a look at the list of 23 modulator manufacturers and their company rankings.
Table of Contents
A modulator is a device that changes the amplitude, frequency, phase, etc., (modulation) of an original electrical signal to make it easier to transmit.
For example, when performing wireless communication between two distant points, it is difficult to transmit the data as a signal, so it is necessary to modulate the signal with a modulator.
There are two types of modulation methods: analog modulation and digital modulation. The difference is whether the signal to be handled is an analog or digital signal, and the basic principle of both is the same.
Modulators are used as equipment for transmitting and receiving TV and radio broadcasts. Although the frequency varies with the type of information, such as audio and video, the frequency may be too low to transmit as-is as a signal. For this reason, television and radio broadcasting transmit data by modulating it to a higher frequency than the original signal.
Also, in Internet connections, electrical signals may be modulated into optical signals, as in fiber-optic lines, or transmitted using telephone lines with unique frequencies.
In broadcasting and wireless communications, it is not practical to transmit data as it is to the other party, and it is necessary to modulate the data into a form that is easy to transmit. Modulators first prepare a base signal, and then add differences to the base signal to make it distinguishable. This base signal is called a carrier wave.
There are three major ways to put a signal on a carrier wave.
The first is "amplitude modulation" (AM), which modulates the amplitude of the carrier wave. This is used in radio and television, but it is also characterized by the fact that it picks up external noise.
The second is "frequency modulation" (FM), which modulates the frequency of the carrier wave. This method is used for FM radio broadcasting. Although the frequency bandwidth is wider, the advantage is that there is less disturbance compared to amplitude modulation.
The third method is called "phase modulation" (PhM), in which the phase of the carrier wave is shifted according to the size of the signal. This method is often used in digital modulation, which has now become mainstream.
*Including some distributors, etc.
Sort by Features
Sort by Area
Accele Electronics, Inc. is based in Santa Fe Springs, California. Accele has a 30 year history as a manufacturer and distributor of automotive technology solutions, also offering services such as, installation and support throughout its 30+ year history. Example products include LCD monitors, headrest monitors, mirror monitors, drive and park sensors, video recording and camera kits and accessories, A/V switchers, RV camera systems, cables, lighting, HUD, security systems, fuses and circuits, relays, bus and coach amenities, as well as comfort and convenience items.
WIN SOURCE is a customer-focused online store serving a wide variety of markets industries ranging from consumer to automotive to medical, industrial, and aerospace. WS specializes on size and speed, offering a catalog of over 1 million SKUS that can be shipped within 24 hours around the world. Offerings include an extensive array of semiconductor components, audio products, cable assemblies, racks, and battery products. WIN SOURCE is AS9120B, ISO9001, ISO14001, and ISO45001 certified and is a member of the anti-counterfeiting organization, ERAI.
Hybrid Electronics is a global distribution specialist of electronic components, with access to over 50 million unique components. Among the markets HE serves are the aerospace, automotive, communications, defense, industrial, medical, national security, and test & measurement industries. In addition to components, HE also provides quality and compliance testing, counterfeit detection, upscreening, and other forms of quality control. Examples of component subtypes that HE offers include ICs, batteries, capacitors, semiconductor products, sensors, circuit protection, interconnectors, filters, optoelectronics, relays, switches, power supplies, and cables and cable assemblies.
Supply Solutions was founded in the early 2000s and operates out of Stonewood, West Virginia. Supply Solutions is a wholesale distributor serving the telecommunications industry, including traditional CATV operators, independent telephone companies and FTTX providers, as well as the contractors that support these operations. Supply Solutions offers hardware including aerial hardware including sub-components and parts,, cables, conduits, fiber optics, power supplies, sealants, test equipment, drop & instillation products, FTTX equipment including optical enclosures, headend products, underground equipment, wireless equipment, poles, as well as test equipment.
Number of Employees
Newly Established Company
Company with a History
This is the version of our website addressed to speakers of English in the United States. If you are a resident of another country, please select the appropriate version of Metoree for your country in the drop-down menu.