Patent ID: 8102396
Filing Date: 2012-01-24
Classification: G01R

Abstract:
1. An apparatus for use in a test and measurement instrument for calculating a parameter of a digitized signal comprising: an input for receiving an input signal; a digitizer to digitize said input signal into a digitized input signal; a first rasterizer coupled to said digitizer to generate a first raster image from the digitized input signal; a second rasterizer coupled to said digitizer to generate a second raster image from the digitized input signal; a processor to receive the first raster image; a control interface to receive a control signal indicating a request for a measurement; the first rasterizer being responsive to the control signal to generate the first raster image from the digitized input signal, and the processor being responsive to the control signal to generate a histogram from the first raster image; wherein said first rasterizer is configurable to generate the first raster image having only one column in response to the control signal; wherein said processor is configurable to generate each entry of the histogram from a corresponding row of said first raster image; wherein said processor calculates said parameter from said histogram and uses said parameter as a measurement of said digitized signal; and a display configured to display the second raster image, the second raster image being suitable for displaying a waveform representing the input signal.