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US5025208A
Expired / Lapsed
US
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Method of measuring radio-frequency interfering voltages
Assignee: Rohde and Schwarz GmbH and Co KG
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Filing: 1989-05-01
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Granted: 1991-06-18
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Expires: 2009-05-01
Abstract
Abstract For fast measurement of radio-frequency interference voltages (also called RFI voltages) within a predetermined frequency range in conformity with rating standards, the maximum and minimum peak voltage levels are measured during tuning of the frequency range; when the maximum peak voltage level exceeds a predetermined limit value,the tuning process is interrupted and a quasi-peak measurement is performed at this instantaneous frequency.
Inventors
- 👤 Klaus Danzeisen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:08
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/0007
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
A method of measuring RFI voltages in a predetermined frequency range, comprising the steps of: tuning the frequency range of a receiver and, during tuning of the frequency range, measuring the maximum and minimum peak voltage levels; comparing the measured maximum peak voltage level with a predetermined limit value and interrupting tuning when the limit value is exceeded; comparing the maximum peak voltage level with the minimum peak voltage level; and evaluating the result of the comparison of the maximum peak voltage level with the minimum peak voltage level by deciding in dependence of this comparison whether or not an additional quasi-peak measurement shall be performed and evaluated at the instantaneous frequency of interruption.
Claim 2
Independent Claim
114 words
A method of measuring RFI voltages in a predetermined frequency range, comprising the steps of: tuning the frequency range of a receiver and, during tuning of the frequency range, measuring the maximum and minimum peak voltage levels; comparing the measured maximum peak voltage level with a predetermined limit value and interrupting tuning when the limit value is exceeded; comparing the maximum peak voltage level with the minimum peak voltage level; and evaluating the result of the comparison of the maximum peak voltage level with the minimum peak voltage level by deciding in dependence of this comparison whether or not an additional quasi-peak measurement shall be performed and evaluated at the instantaneous frequency of interruption.
Claim 3
Dependent Claim
29 words
The method of claim 1, and further defined as: with the tuning process interrupt, performing the quasi-peak measurement only when the maximum and minimum peak voltage levels are different.
Claim 4
Dependent Claim
23 words
The method of claim 1, and further defined as: determining the repetition frequency of the interference signal from the result of quasi-peak measurement.
Claim 5
Dependent Claim
22 words
The method of claim 1, and further defined as: with the tuning process interrupted, measuring the average level of the interference voltage.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-17 | 1994-12-17 | 1995-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-17 | 1998-12-17 | 1999-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-17 | 2002-12-17 | 2003-06-18 | $7700.00 | Window Closed / Lapsed |