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Title:
METHOD FOR DISPLAYING WAVEFORM RECORDING DEVICE
Document Type and Number:
Japanese Patent JP3142347
Kind Code:
B2
Abstract:

PURPOSE: To automatically set the upper and lower limit values of a display screen according to the amplitude of a computed waveform in computing an input waveform and displaying the computed waveform on the display screen.
CONSTITUTION: The waveform displaying method of a waveform recording device includes converting an analog input signal into a digital signal using an A/D converter 10, subjecting the digital signal to predetermined arithmetic processing at a central processing portion(CPU)11, and displaying the processed waveform data in a display portion 14 such as a CRT; a maximum value MAX and a minimum value MIN are detected from the waveform data processed by the CPU 11. The maximum value MAX and the minimum value MIN are compared with respective numerical values which are expressed in the series of m×10n(m, n are some integers) and an immediate superior value larger than the maximum value MAX is set to the upper limit value UL used in displaying the computed waveform and an immediate inferior value smaller than the minimum value MIN is set to the lower limit value LL used in displaying the computed waveform and the waveform data are displayed on the screen.


Inventors:
Shuichi Takahashi
Miyazaki Motoyoshi
Application Number:
JP3457292A
Publication Date:
March 07, 2001
Filing Date:
January 24, 1992
Export Citation:
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Assignee:
Hioki Electric Co., Ltd.
International Classes:
G01R13/20; G06F17/10; (IPC1-7): G01R13/20; G06F17/10
Domestic Patent References:
JP61249090A
JP245767A
Attorney, Agent or Firm:
Takuya Ohhara