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Apparatus and method for displaying a waveform at high rate with a large aquisition memory

A technology for displaying waveforms and memory, applied in digital variable display, digital variable/waveform display, instruments, etc., can solve problems such as loss of information

Active Publication Date: 2011-07-20
TEKTRONIX INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with this technique, information between shorter waveforms may be lost

Method used

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  • Apparatus and method for displaying a waveform at high rate with a large aquisition memory
  • Apparatus and method for displaying a waveform at high rate with a large aquisition memory
  • Apparatus and method for displaying a waveform at high rate with a large aquisition memory

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Embodiment Construction

[0024] figure 1 is a block diagram of a waveform display device 100 according to an exemplary embodiment of the present invention, and the device includes an acquisition and trigger unit 101 , a control unit 200 , a display unit 300 and a control panel 400 . The waveform display device 100 may generally be a digital oscilloscope. figure 1 The oscilloscope 100 in , has two channels or inputs suitable for use with the various embodiments described herein, but the inventive points described are equally applicable to oscilloscopes with four inputs, or any number of inputs.

[0025] Analog-to-digital converters (ADCs) 103 convert signals under test from two inputs (two channels) into digital data (digital samples). Acquisition memory 104 stores a certain amount of digital data, which may be much larger than the length of data that may be of interest to a user. Although acquisition memory 104 is shown as a single block, it should be understood that acquisition memory 104 may inclu...

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PUM

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Abstract

A waveform display apparatus and method displays one or more waveforms of a signal under test at high throughput while acquiring digital data of the signal under test in a large acquisition memory. A user sets a time interval of user's interest when viewing a signal under test and sets trigger criteria through a user interface. An ADC converts the signal under test into digital data that is stored in a large acquisition memory. A trigger unit detects and produces trigger events, based on a trigger, as trigger event information during one acquisition process. A trigger event eliminator may discard some of the trigger events based on pre-trigger and post-conditions set through the interface by a user. The trigger events are recorded in a trigger list as the trigger event information. A control unit locates the digital data in the acquisition memory corresponding to the trigger events in the trigger list and displays a waveform associated with the trigger event for the time interval on a display device.

Description

technical field [0001] This invention relates generally to the field of test and measurement instruments, and more particularly to the acquisition of signals in digital storage oscilloscopes. Background technique [0002] Modern digital oscilloscopes can acquire the electrical signal under test and store the digital data corresponding to the acquired signal as a data record. This oscilloscope can be used to display one or more waveforms while acquiring the electrical signal under test. In addition, even if the acquisition of the electrical signal under test has been stopped, the digital data pre-stored in the data log can still be observed as waveforms on the display of the oscilloscope. While older oscilloscopes typically acquire relatively few data records corresponding to the amount of time that can be displayed, advances in the areas of memory speed, memory capacity, and processor speed have resulted in newer oscilloscopes with improved functionality in the field. Most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R13/02
CPCG01R13/0254G01R13/0236
Inventor S·K·萨利文K·L·韦思T·R·比尔P·M·格尔拉赫G·A·马丁G·S·沃克
Owner TEKTRONIX INC
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