displayed average noise level

The noise level viewed on the analyzer’s display after narrowing the video bandwidth setting enough to reduce the peak-to-peak noise fluctuations. The resulting noise display is essentially a straight line. Usually this term refers to the analyzer’s own internally generated noise as a measure of sensitivity. It is typically specified in dBm under conditions of minimum resolution bandwidth and minimum input attenuation.

DLP

The abbreviation for downloadable program. A single programming command or a sequence of programming commands used to perform specific operations. DLPs can be made up of several functions, variables, and traces defined by the program creator. The DLP can be downloaded from one electronic storage medium into another and executed without a controller.

drift

The slow (relative to sweep time) change of signal position on the display as a result of a change in local oscillator frequency versus sweep voltage. While analyzer drift may require periodic retuning, it does not impair frequency resolution.

dynamic range

The power ratio (dB) between the smallest and largest signals simultaneously present at the input of an analyzer that can be measured with some degree of accuracy. Dynamic range generally refers to measurement of distortion or intermodulation products.

EM1

The abbreviation for electromagnetic interference. An EM1 measurement determines how much an undesired electromagnetic disturbance impairs the reception of a desired electromagnetic signal.

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