Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Analysis of complex waves
Patent
1988-06-27
1989-06-13
Tokar, Michael J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Analysis of complex waves
364485, G01R 2316
Patent
active
048395838
ABSTRACT:
A frequency converter converts an input signal into an intermediate frequency signal corresponding to a local oscillation signal to be analog-swept from a local oscillator. An A/D converter converts the intermediate frequency signal into the corresponding digital signal. A memory stores the digital signal in accordance with its a frequency. A display displays the digital signal stored in the memory along a frequency axis. A sweep signal generator receives first or second sweep measurement frequency range setting data from a sweep range setting unit and supplies the data to the local oscillator as the analog sweep signal for an entire or partial sweep operation. Upon reception of the first sweep measurement frequency range setting data, a display controller causes the display to display the digital signal stored in the memory in correspondence with the analog sweep signal for the entire sweep operation. Upon reception of the second sweep measurement frequency range setting data present in the first range from the sweep range setting unit, the display controller causes the display to update and display the digital signal of a portion corresponding to the second sweep measurement frequency range which is updated in the memory in correspondence with the analog sweep signal for the partial sweep operation.
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Fukaya Seiryo
Takano Mitsuyoshi
Anritsu Corporation
Tokar Michael J.
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