The analyzer sweeps once when trigger conditions are met. Each sweep is initiated by pressing an appropriate
sinusoid
A wave whose
softkey
Key labels displayed on a screen or monitor which are activated by mechanical keys surrounding the display, or located on a keyboard. Softkey selections usually evoke menus that are written into the program software.
span
Span equals the stop frequency minus the start frequency. The span setting determines the
span accuracy
The uncertainty of the indicated frequency separation of any two signals on the display.
spectral purity
See noise sidebands.
spectral component
One of the sine waves comprising a spectrum.
spectrum
An array of sine waves differing in frequency and amplitude. They are properly related with respect to phase and, taken as a whole, constitute a particular