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The Design and Accomplish of a Digital Tester for Frequency Response Characteristic

Author: TianYunXia
Tutor: WangWenLi
School: Hebei University
Course: Communication and Information System
Keywords: The tester for frequency characteristic Amplitude frequency characteristic Single Chip Machine Code keyboard Colored liquid crystal display
CLC: TP216
Type: Master's thesis
Year: 2007
Downloads: 96
Quote: 0
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Abstract


The thesis introduced the design and realization of the tester for frequency characteristic based on enhancing the measuring accuracy and realization friendly man-machine contact surface, the tester for frequency characteristic is based on MCU+LCD. The article in detail introduced the control and arithmetic portion taking the Single Chip Machine as the core, as well as the man-machine connect portion taking the liquid-crystal display as the core. AT89C52 controls the coordinated work of the overall system and processes the measured data. The keyboards of man-machine connect portion uses coded keyboard chip HD7279A, which communicates with the Single Chip Machine by the serial way; the display part uses the colored liquid crystal module LFUBK911, which has the standard STN connection and take the NHC03 as the control card, the Single Chip Machine manages it through the parallel connection.The primary one is the data development of the liquid crystal module, including each sub-module design, the computation and display of the amplitude frequency characteristic as well as the migrated of cursor, and has carried on the conformable display and the error analysis to the amplitude frequency characteristic.The second, the control to the amplitude detect portion, the data processing and the communication with the man-machine connect portion of the control and arithmetic portion, and completed the management to the four kind of active status through the two level displaying.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Automatic testing equipment,instruments
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