Device that converts a signal (voice or other) into a form that can be transmitted.
In wireless microphones, an electronic circuit to superimpose an audio signal on a RF signal, usually by varying its frequency in synchronization with the audio signal. Also called an FM modulator.
A device for combining two signals with the result that a part of one signal (the carrier) is varied in step by the other, called the modulating signal.
Refers to a device which is capable of transforming an analog video or audio signal (or other type of electrical signal) into an RF radio frequency for wired installations. Modulating video into RF allows for longer cable runs in hardwired surveillance systems. Modulators, often called wired transmitters, also require a demodulating piece of equipment to reconvert the RF signal into a typical analog audio / video signal for proper display on a television, monitor, video recorder, etc.
A device used to assign video signals to specific channels on the in-home video network. Modulated signals are not transmitted outside the house.
A device that adjusts by small increments of changes.
a device that encodes data onto a beam of light at extremely high data rates by acting like a switch to turn the light off and on, similar to the way a transistor acts like a switch to turn the flow of electrons on and off
a device that takes low-level video, and modulates onto a channel that can be viewed on any TV in the house
a device to change such a wave
a device which varies a characteristic of a repetitious electrical or electromagnetic wave of less than infrared frequency in accordance with a characteristic of an arbitrarily varying information carrying signal
an object that converts the information encoded in a signal into another code
A modulator combines two different signals that can be pulled apart later.
Used to transmit digital information across an analogue channel, such as a phone line. Modems are necessary because of the technical difficulties of transmitting a purely digital signal.
A device that modulates a signal, for example an analogue signal or an MPEG-2 transport stream onto a radio frequency carrier
A device that converts a signal from one form to another, e.g. from digital to analogue, or from low frequency, LF, to high frequency, HF.
The electronic equipment required to combine video and audio signals from a studio and convert them to radio frequencies (r-f) for distribution on a cable system. Also, a very low-powered television signal generator used to provide signals for distribution on a CATV system.
Device that modulates a carrier. Used as components in broadcasting transmitters and in satellite transponders. Also used by CATV companies to place a base band video television signal onto a desired VHF or UHF channel. Home video tape recorders also have built-in modulators to enable recorded video information to be played back using a television receiver tuned to VHF channel 3 or 4.
This is a device with the purpose of modulating a carrier wave and are basic components in both satellite transponders and broadcasting transmitters. Home video cassette recorders (VCRs) have modulators in them so the video recorded on the tape can be played back and viewed with a television set.
A device which superimposes an information signal onto a n RF carrier. It has two inputs (the carrier and the information signal) and one output (the modulated signal).
A device which modulates a carrier. Modulators are found as components in broadcasting transmitters and in videoconference transponders.
A device which superimposes the amplitude, frequency or phase of a wave or signal onto another wave or signal (a carrier), which is then used to convey the original signal via a transmission medium (e.g. satellite link).
A device that modulates and demodulates signals transmitted over a network. It converts computer data (digital) into audio signals (analog) for transmission across telephone lines.
A device that modulates a carrier. Modulators are found as components in broadcasting transmitters and in satellite transponders. Modulators are also used by CATV companies to place a baseband video television signal onto a desired VHF or UHF channel. Home video tape recorders also have built-in modulators that enable the recorded video information to be played back using a television receiver tuned to VHF or UHF channel.
A device which modulates a carrier; found as components in broadcasting transmitters and satellite transponders. Modulators are also used by CATV companies to place a baseband video television signal onto a desired VHF or UHF channel. Home VCRs have built-in modulators allowing recorded video played back using a television receiver turned to VHF channel 3 or 4.
The part of the modem that converts digital signals to analog signals.
Equipment that converts audio, video, or data signals (baseband) into an RF signal.
A means of getting baseband frequency into an R.F. frequency that can be received by a standard TV tuner. This is accomplished by mixing the 6 Mhz (NTSC) signal with the proper carrier frequency to give a standard channel output frequency.
(MODEM) A device for transmitting digital data over telephone wires by modulating the data into an audio signal to send it and demodulating an audio signal into data to receive it.
A device for effecting the process of modulation. The amplitude, frequency, or phase of a carrier signal is varied with time by an applied information signal.
A device that adjusts by small increments or changes.
A device that serves as a bridge between your digital computer...
A component in satellite transponders that modulates the signal so it can be read.
A circuit that combines two signals of different frequencies into a single composite signal.
A device that produces modulation; that is, a device that varies the amplitude, frequency, or phase of an ac signal. A circuit used in servo-systems to convert a dc signal to an ac signal. The output ac signal is a sine wave at the frequency of the ac reference voltage. The amplitude of the output is directly related to the amplitude of the dc input. The circuit's function is opposite to that of a DEMODULATOR. In radar, it produces a high-voltage pulse that turns the transmitter on and off.
A device that imposes a signal on a carrier.