Data Acquisition SystemSystem which acquires data, generally by digitizing analog channels and storing the data in digital form. These systems can be standalone or married to a computer and can acquire multiple channels of data.
DAQSystem which acquires data, generally by digitizing analog channels and storing the data in digital form. These systems can be standalone or married to a computer and can acquire multiple channels of data.
dBmA unit that defines a signal level by comparing it to a reference level. The reference level of 0dBm is defined as 1mW. The signal level in dBm is 10 times the log of the signal's power over that of the 0dBm reference.
DecibelA unit for expressing the ratio of two amounts of electric or acoustic signal power equal to 10 times the common logarithm of this ratio.
dmA unit for expressing the ratio of two amounts of electric or acoustic signal power equal to 10 times the common logarithm of this ratio.
Declaration of ConformityA signed document regarding compliance of a product with European safety standards and legislation.
Detector - Peak, Quasi-Peak, Slideback PeakDetector is used as the final stage of demodulation in a superhetrodyne receiver. It is used to recover the envelope of the input or baseband signal from the intermediate frequency (IF) components or carrier.
Dielectric AbsorptionThe effect when a capacitor that has been charged for a long time and then been completely discharged has a small voltage on its terminal wires again, within seconds or minutes.
Differential Mode InterferenceA signal that appears on two lines of a closed loop, but current flow is in opposite directions.
DiodeA two-terminal semiconductor device that rectifies signals (passes current in only one direction).
Dipole AntennaSimplest and most widely used class of antenna. It consists of two identical conductive elements such as metal wires or rods, which are usually bilaterally symmetrical.
Down ConvertersA device which provides frequency conversion to a lower frequency, e.g. in digital broadcast satellite applications.
Dual-BandAn antenna that has two modes of operation.
