A/D Channel List Start
Signal used to start the A/D acquisition of channels in the channel list. The triggering edge of this signal (falling edge) enables the ADC Conversion Start signals
The process of converting a single analog input to a digital value
A/D Conversion Start
Signal used to start the conversion process of an analog input to a digital value. The source of this signal can be either an internal ADC synchronous clock or an external asynchronous signal. This signal causes the stepping in the Channel List.
AC – Alternating Current
Electric current that varies in amplitude and direction. The usual waveform of ac is a sine wave, but can be triangular, or square.
ADC – Analog-to-Digital Converter (a.k.a. simply an “A/D”)
An electrical circuit that converts analog voltage into a binary number. A/D converters perform the measurements in all data acquisition systems
A false lower frequency image of a high-frequency component that appears in sampled data acquired at too low a sampling rate. For more information about aliasing please visit this explanation at Analog Devices.
A brand name for a magnetic nickel alloy containing small amounts of manganese, aluminum, and silicon. Used in thermocouples and thermocouple extension wire.
SI unit of electric current.
A device for increasing the power of a signal by taking power from a power supply and controlling the output to match the input signal shape
but with a larger amplitude.
The size or magnitude of a signal.
An analog input is an infinitely variable signal. In most data acquisition systems this signal is connected to an input amplifier and then to an A/D converter.
A waveform or control signal generated as a continuous function of the measured parameter.
A trigger that occurs at a user-selected point on an incoming analog signal. Triggering can be set to occur at a specific level on either an increasing or a decreasing signal (positive or negative slope).
A low pass filter that allows the desired low frequency component of the input waveform through, but stops the higher frequency components that can lead to aliasing errors (See Alias).
Application Programming Interface, a collection of high-level language function calls that provide access the functions in a driver or other utility.
An Input parameter to a program.
An avionics interface protocol which is the standard communications link in virtually all modern commercial aircraft.
American Standard Code for Information Interchange. Coding for text files.
A program that translates assembly language instructions into machine language instructions.
A machine oriented language in which mnemonics are used to represent each machine language instruction for a particular CPU.
American Society for Testing and Materials.
(1) Hardware – A property of an event that occurs at an arbitrary time, without synchronization to a reference clock.
(2) Software – A property of a function that begins an operation and returns prior to the completion or termination of the operation.