Patent ID: 6687628
Filing Date: 2004-02-03
Classification: G01R

Abstract:
A display for a signal analyzer, the display comprising:a first region in which is displayed a first waveform representing a signal, the first waveform being shown in two dimensions, one dimension representing signal amplitude and one dimension representing signal frequency; a second region in which is displayed a second waveform, the second waveform representing a subset of data points of the first waveform, the second waveform also being shown in two dimensions, one dimension representing signal amplitude and one dimension representing signal frequency, wherein a box is displayed in the first region, a left edge of the box representing a start frequency for the second waveform, a right edge of the box representing a stop frequency for the second waveform, a top edge of the box representing an upper amplitude limit for the second waveform and a bottom edge of the box representing a lower amplitude limit for the second waveform; means for, in response to a user varying any edge of the box, correspondingly varying the second waveform displayed in the second region; and, a control panel, including four controls, a first control being used to position the left edge of the box, a second control being used to position the right edge of the box, a third control being used to position the top edge of the box, a fourth control being used to position the bottom edge of the box, wherein the four controls are multimode so that in a waveform mode the four controls are used to adjust parameters of the first waveform displayed in the first region.