DAQ Dictionary: D

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21 November

DAQ Dictionary: D

Posted by:ReadyDaq in Automation

We’ve learned so far that data acquisition is a vast area to be learned over night. That’s why we’re trying to get into detail and explain the most important terms used when it comes to daq. Enjoy this part and stay tuned, the new article will come out soon.


Acronym for data acquisition and control.


The popular term for data acquisition.

Data Acquisition

The automatic gathering of data from sensors, tools and devices.

Data Logger

An electronic device that assembles and saves data over time. May be a stand-alone device or connected to a PC. 

Data Logging

Measuring and recording readings during a period of time.

Data Persistence

The period during which data is valid. As soon as data has been read from a device it is saved and returned as a valid reading. 


Data Circuit-Terminating Equipment or Data Communications Equipment. 


A logarithmic measure of the ratio between two quantities. Symbol dB.


An external which connects to the PC. 

Digital Input

A digital signal entering a data acquisition device.

Digital Output

A digital signal produced by the data acquisition and control equipment. 

Digital-to-Analogue (D-A) Converter

Used to create analog output signals. These are either control signals or synthesized waveforms.

Direct Current (dc)

Current that flows in one direction.


A software that controls a device. Each device has its own set of commands that driver comprehends, and can translate for other software.


Data Terminal Equipment. It is part of the RS232 standard.

Dynamic Crosstalk

When one channel's signal effects an unwanted result on another.

Dynamic IP Address

A device can get its IP Address assigned when it powers up. This uses a process called Dynamic Host Configuration Protocol (DHCP).

Dynamic Range

The proportion of the biggest to the tiniest signal that can be measured at one time. Generally expressed in Decibels (dB). The maximum signal is usually the analogue-to-digital converter's full-scale signal. 

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