HARMONIC FACTOR TESTING APPARATUS FOR INTELLIGENCE-POWER TELEPHONE

The utility model relates to an intellectualized harmonic factor testing apparatus for electrically powered telephone, which is a multifunctional intellectualized apparatus controlled by a microcomputer. The utility model is composed of a microcomputer, a telephone harmonic factor testing apparatus,...

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Bibliographic Details
Main Author WU NAILING
Format Patent
LanguageEnglish
Published 30.12.1992
Edition5
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
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Abstract The utility model relates to an intellectualized harmonic factor testing apparatus for electrically powered telephone, which is a multifunctional intellectualized apparatus controlled by a microcomputer. The utility model is composed of a microcomputer, a telephone harmonic factor testing apparatus, an interface circuit, a digital-analog converter, a controller, a display and a shielding casing, wherein, the telephone harmonic factor testing apparatus is composed of an input network, a variable attenuator, a preamplifier, an analog switch, a filter, a main amplifier, a voltage converter and a buffer amplifier. The filter comprises telephone weight, audio frequency and harmonic filter. The apparatus is provided with an oscillator for self-test and self-checking, and the input network is provided with a crowbar protection. The utility model has the characteristics of high performance, low cost, etc., and the utility model can be used for measuring the waveform deviation factor.
AbstractList The utility model relates to an intellectualized harmonic factor testing apparatus for electrically powered telephone, which is a multifunctional intellectualized apparatus controlled by a microcomputer. The utility model is composed of a microcomputer, a telephone harmonic factor testing apparatus, an interface circuit, a digital-analog converter, a controller, a display and a shielding casing, wherein, the telephone harmonic factor testing apparatus is composed of an input network, a variable attenuator, a preamplifier, an analog switch, a filter, a main amplifier, a voltage converter and a buffer amplifier. The filter comprises telephone weight, audio frequency and harmonic filter. The apparatus is provided with an oscillator for self-test and self-checking, and the input network is provided with a crowbar protection. The utility model has the characteristics of high performance, low cost, etc., and the utility model can be used for measuring the waveform deviation factor.
Author WU NAILING
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Snippet The utility model relates to an intellectualized harmonic factor testing apparatus for electrically powered telephone, which is a multifunctional...
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SubjectTerms ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
Title HARMONIC FACTOR TESTING APPARATUS FOR INTELLIGENCE-POWER TELEPHONE
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