Signal tracer For long pulse trains, a cyclic redundancy check may be calculated and displayed, giving the tech insight into the content of circuits that are switching rapidly. Signal tracer A signal tracer is a piece of electronic test equipment used to troubleshoot radio and other electronic circuitry. Usually a very simple device, it normally provides an amplifier, and a loudspeaker, often battery-powered and packaged into a small, hand-held test probe. An optional diode detector is usually also provided, allowing the detection of amplitude-modulated signals. The technician injects a test signal into the device under test. Then, by using the signal tracer,
Electronic drum module special-purpose electronic device which accepts input from the drummer via external triggers that are hit with regular drum sticks. With an electronic drum kit, the player hits triggering devices as a synthesizer player would strike the keys of the synthesizer keyboard. Triggers may be pads or cymbal-shaped devices or piezo-electric pick-ups similar in function to a guitar pick-up. When the triggers are struck or activated by the vibration of a drum or other instrument, the electronic drum module interprets the signal and outputs the specific voice assigned to that trigger. The sound (or "voice") may be a sample or synthesized