US4642519A
Expired / Lapsed
US
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Digital wave observation apparatus
Assignee: Anritsu Corp
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Filing: 1985-10-09
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Granted: 1987-02-10
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Expires: 2005-10-09
Abstract
Abstract In a digital wave observation apparatus having an A/D converter for A/D converting an input signal, a trigger level setting device for setting a trigger level, a trigger signal generator for comparing the input signal with a set trigger level and generating a trigger signal, a wave memory for storing an A/D converted input signal in response to the trigger signal, and a display for displaying the input signal stored in the wave memory, the apparatus has a trigger level display device for displaying a horizontal line corresponding to a trigger level on the display irrespective of generation of the trigger signal.
Inventors
- 👤 Kenji Nakatsugawa
- 👤 Aiichi Katayama
- 👤 Hitoshi Sekiya
- 👤 Shoji Hiratsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:18
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A digital wave observation apparatus having an A/D converter for A/D converting an input signal, a trigger level setting device for setting a trigger level, a trigger signal generator for comparing the input signal with a set trigger level and generating a trigger signal, a wave memory for storing an A/D converted input signal in response to the trigger signal, and a display for displaying the input signal stored in said wave memory, comprising a trigger level display device for displaying a horizontal line corresponding to a trigger level on said display irrespective of generation of the trigger signal.
Claim 2
Dependent Claim
99 words
A digital wave observation apparatus having an A/D converter for A/D converting an input signal, a trigger level setting device for setting a trigger level, a trigger signal generator for comparing the input signal with a set trigger level and generating a trigger signal, a wave memory for storing an A/D converted input signal in response to the trigger signal, and a display for displaying the input signal stored in said wave memory, comprising a trigger level display device for displaying a horizontal line corresponding to a trigger level on said display irrespective of generation of the trigger signal.
References Cited (Backward Citations)
US2962625A
Cited
US3474438A
Cited
US4302755A
Cited
US4346333A
Cited
US4555765A
Cited
JPS59155229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |