Patent US2665634A successfully refreshed from Google Patents.
US3071726A
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Frequency modulation measurment method and apparatus
Assignee: Varian Medical Systems Inc
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Filing: 1959-09-29
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Granted: 1963-01-01
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Expires: 1979-09-29
Abstract
No abstract record available.
Inventors
- 👤 Bruce E Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:16
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
179 words
A METHOD FOR MEASURING EQUIVALENT FREQUENCY DEVIATION $FN OF THE F.M. COMPONENTS IN THE OUTPUT SIGNAL OF AND R.F. GENERATOR PRESENT EITHER DUE TO NOISE OR DISCRETE MODULATIONS INCLUDING THE STEPS OF, FREQUENCY MODULATING THE R.F. GENERATOR WITH A SIGNAL OF A KNOWN REFERENCE FREQUENCY FM, DERIVING A SIGNAL FROM THE R.F. OUTPUT OF THE R.F. GENERATOR WHICH HAS AN AMPLITUDE PROPORTIONAL TO THE FREQUENCY DEVIATION OF THE MODULATING R.F. GENERATOR AT CERTAIN SELECTABLE MODULATING FREQUENCIES, VARYING THE AMPLITUDE VM OF THE MODULATING SIGNAL WHILE MONITORING THE CARRIER AMPLITUDE OF THE R.F. GENERATOR, ADJUSTING THE AMPLITUDE VM OF THE MODULATING SIGNAL FOR THE FIRST CARRIER NULL CONDITION WHEREBY A CERTAIN UIQUELY DETERMINED FREQUENCY DEVIATION $FR IS OBTAINED AT THE KNOWN MODULATING FREQUENCY FM, MEASURING THE AMPLITUDE VR OF THE DERIVED SIGNAL PROPORTIONAL TO THE IMPRESSED FREQUENCY DEVIATION AT THE REFERENCE FREQUENCY FM FOR THE FIRST CARRIER NULL CONDITION, MEASURING THE AMPLITUDE VN OF THE DERIVED SIGNAL PROPORTIONAL TO THE FREQUENCY DEVIATION AT THE MODULATING FREQUENCIES TO BE MEASURED, WHEREBY THE EQUIVALENT FREQUENCY DEVIATION MAY BE COMPUTED FROM MEASUREMENTS OBTAINED.
Claim 2
Independent Claim
179 words
A METHOD FOR MEASURING EQUIVALENT FREQUENCY DEVIATION $FN OF THE F.M. COMPONENTS IN THE OUTPUT SIGNAL OF AND R.F. GENERATOR PRESENT EITHER DUE TO NOISE OR DISCRETE MODULATIONS INCLUDING THE STEPS OF, FREQUENCY MODULATING THE R.F. GENERATOR WITH A SIGNAL OF A KNOWN REFERENCE FREQUENCY FM, DERIVING A SIGNAL FROM THE R.F. OUTPUT OF THE R.F. GENERATOR WHICH HAS AN AMPLITUDE PROPORTIONAL TO THE FREQUENCY DEVIATION OF THE MODULATING R.F. GENERATOR AT CERTAIN SELECTABLE MODULATING FREQUENCIES, VARYING THE AMPLITUDE VM OF THE MODULATING SIGNAL WHILE MONITORING THE CARRIER AMPLITUDE OF THE R.F. GENERATOR, ADJUSTING THE AMPLITUDE VM OF THE MODULATING SIGNAL FOR THE FIRST CARRIER NULL CONDITION WHEREBY A CERTAIN UIQUELY DETERMINED FREQUENCY DEVIATION $FR IS OBTAINED AT THE KNOWN MODULATING FREQUENCY FM, MEASURING THE AMPLITUDE VR OF THE DERIVED SIGNAL PROPORTIONAL TO THE IMPRESSED FREQUENCY DEVIATION AT THE REFERENCE FREQUENCY FM FOR THE FIRST CARRIER NULL CONDITION, MEASURING THE AMPLITUDE VN OF THE DERIVED SIGNAL PROPORTIONAL TO THE FREQUENCY DEVIATION AT THE MODULATING FREQUENCIES TO BE MEASURED, WHEREBY THE EQUIVALENT FREQUENCY DEVIATION MAY BE COMPUTED FROM MEASUREMENTS OBTAINED.
Claim 3
Dependent Claim
162 words
APPARATUS FOR MEASURING THE EQUIVALENT FREQUENCY DEVIATION OF F.M. SIDEBAND NOISE COMPONENTS IN THE OUTPUT SIGNAL OF AN R.F. GENERATOR COMPRISING MEANS FOR DETECTING THE INSTANTANEOUS FREQUENCY DEVIATION OF THE OUTPUT SIGNAL OF THE R.F. GENERATOR, MEANS FOR DERIVING A SIGNAL FROM THE DETECTED INSTANTANEOUS FREQUENCY DEVIATION IN VARIABLE ACCORDANCE WITH THE FREQUENCY DEVIATION AT A CERTAIN MODULATING FREQUENCY WITHIN A CERTAIN SELECTABLE RELATIVELY NARROW FREQUENCY BAND WHICH IT IS DESIRED TO MEASURE, MEANS FOR MEASURING THE AMPLITUDE OF THE DERIVED SIGNAL OF THE SELECTABLE FREQUENCY DEVIATION COMPONENT, AND MEANS FOR IMPRESSING A REFERENCE F.M. FREQUENCY DEVIATION COMPONENT ON THE OUTPUT R.F. SIGNAL OF THE R.F. GENERATOR AND HAVING AN AMPLITUDE CORRESPONDING TO A KNOWN FREQUENCY DEVIATION, SUCH THAT BY COMPARING THE MEASURED AMPLITUDES OF THE REFERENCE FREQUENCY DEVIATION SIGNAL AND THE FREQUENCY DEVIATION SIGNAL OF THE SELECTED NOISE COMPONENTS, THE FREQUENCY DEVIATION OF THE NOISE COMPONENTS AND THUS THE RELATIVE AMPLITUDE OF THE R.F. CARRIER AND THE NOISE COMPONENTS IS DETERMINED.
Claim 4
Dependent Claim
162 words
APPARATUS FOR MEASURING THE EQUIVALENT FREQUENCY DEVIATION OF F.M. SIDEBAND NOISE COMPONENTS IN THE OUTPUT SIGNAL OF AN R.F. GENERATOR COMPRISING MEANS FOR DETECTING THE INSTANTANEOUS FREQUENCY DEVIATION OF THE OUTPUT SIGNAL OF THE R.F. GENERATOR, MEANS FOR DERIVING A SIGNAL FROM THE DETECTED INSTANTANEOUS FREQUENCY DEVIATION IN VARIABLE ACCORDANCE WITH THE FREQUENCY DEVIATION AT A CERTAIN MODULATING FREQUENCY WITHIN A CERTAIN SELECTABLE RELATIVELY NARROW FREQUENCY BAND WHICH IT IS DESIRED TO MEASURE, MEANS FOR MEASURING THE AMPLITUDE OF THE DERIVED SIGNAL OF THE SELECTABLE FREQUENCY DEVIATION COMPONENT, AND MEANS FOR IMPRESSING A REFERENCE F.M. FREQUENCY DEVIATION COMPONENT ON THE OUTPUT R.F. SIGNAL OF THE R.F. GENERATOR AND HAVING AN AMPLITUDE CORRESPONDING TO A KNOWN FREQUENCY DEVIATION, SUCH THAT BY COMPARING THE MEASURED AMPLITUDES OF THE REFERENCE FREQUENCY DEVIATION SIGNAL AND THE FREQUENCY DEVIATION SIGNAL OF THE SELECTED NOISE COMPONENTS, THE FREQUENCY DEVIATION OF THE NOISE COMPONENTS AND THUS THE RELATIVE AMPLITUDE OF THE R.F. CARRIER AND THE NOISE COMPONENTS IS DETERMINED.
References Cited (Backward Citations)
US2803802A
Cited
US2269126A
Cited
US2415456A
Cited
US2790143A
Cited
GB629545A
Cited
US2587493A
Cited
US2883616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |