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A signal generator is one of a class of electronic devices that generates electrical signals with set properties of amplitude, frequency, and wave shape. These generated signals are used as a stimulus for electronic measurements, typically used in designing, testing, troubleshooting, and repairing electronic or electroacoustic devices, though it often has artistic uses as well.
A numerically controlled oscillator (NCO) is a digital signal generator which creates a synchronous (i.e., clocked), discrete-time, discrete-valued representation of a waveform, usually sinusoidal. [1] NCOs are often used in conjunction with a digital-to-analog converter (DAC) at the output to create a direct digital synthesizer (DDS).
The AN/URM-25 was part of a series of vacuum tube-based signal generators built for the U.S. military in the early Cold War -era. Today they are collected and used by vintage amateur radio and antique radio enthusiasts who say they provide reasonably high accuracy and stability for a low cost, with build quality reflecting tough military ...
A Sony BVS-3200CP vision mixer. The most basic part of a vision mixer is a bus, which is a signal path consisting of multiple video inputs that feed a single output.On the panel, a bus is represented by a row of buttons; pressing one of those buttons selects the video signal in that bus.
A DDS function generator. Direct digital synthesis (DDS) is a method employed by frequency synthesizers used for creating arbitrary waveforms from a single, fixed-frequency reference clock. DDS is used in applications such as signal generation, local oscillators in communication systems, function generators, mixers, modulators, [1] sound ...
A digital pattern generator is a source of synchronous digital stimulus; the generated signal is interesting for testing digital electronics at the logic level - this is why they are also called "logic source". A pulse generator is of purpose to generate an electrical pulse of different shapes; they are mostly used for tests at an electrical or ...
Electromagnetic compatibility. Anechoic RF chamber used for EMC testing (radiated emissions and immunity). The furniture has to be made of wood or plastic, not metal. Electromagnetic compatibility (EMC) is the ability of electrical equipment and systems to function acceptably in their electromagnetic environment, by limiting the unintentional ...
Test card. SMPTE color bars: common NTSC test pattern. PM5544: common PAL test pattern. EBU colour bars (4:3) A test card, also known as a test pattern or start-up/closedown test, is a television test signal, typically broadcast at times when the transmitter is active but no program is being broadcast (often at sign-on and sign-off). [1]