Patent ID: 6642926
Filing Date: 2003-11-04
Classification: G01R,H04L,H04M

Abstract:
A test and measurement instrument having mask testing capability, comprising:an acquisition system for acquiring samples of a waveform; a controller for generating mask pixel data defining a mask; a memory for storing said waveform samples and said mask pixel data, said mask pixel data including an identification code; a rasterizer for reading data from a memory location of said memory, combining said data with said waveform samples, and writing a result of said combining into said memory location; display circuitry coupled to said memory for displaying said mask and said waveform; and a plurality of input devices, coupled to said controller, said devices being subject to adjustment by a user for affecting waveform position and scale on a display; said controller causing said rasterizer to maintain a spatial relationship between a display of said waveform and a display of said mask when one of said plurality of input devices is adjusted to change one of said position and said scale on said display.