US5028131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightwave test set for an RF network analyzer system
Assignee: HP Inc
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Filing: 1989-08-08
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Granted: 1991-07-02
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Expires: 2009-08-08
Abstract
Abstract A lightwave test set interconnected to an existing RF vector or scalar network analyzer system for performing calibrated electro-optical, opto-electrical, optical, and/or electrical measurements on optical systems, subsystems, and associated components.
Inventors
- 👤 Joel P. Dunsmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:58
CPC Classifications
G; G01; G01M; G01M11/00; G01M11/30; G01R; G01R27/00; G01R27/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
A lightwave testing system, comprising: an RF network analyzer system comprising: an RF source for generating an electrical stimulus; an RF receiver and test set for sampling responses of a device under test connected to the test set; and signal processing and display means connected to the RF receiver for displaying processed sampled response data; and a lightwave test set, comprising: a lightwave receiver; an optical coupler; a light source; a leveled RF drive circuit connected to the RF source; an optical modulator connected to the light source and to the RF drive circuit; and means for deriving a reference signal proportional to the RF drive signal transmitted through the optical modulator to provide a phase lock and reference signal to the RF receiver of the RF network analyzer system; whereby the RF receiver of the RF network analyzer system is phase locked to the RF signal which drives the optical modulator, and the power in the RF receiver reference channel is proportional to the modulated optical power.
Claim 2
Dependent Claim
168 words
A lightwave testing system, comprising: an RF network analyzer system comprising: an RF source for generating an electrical stimulus; an RF receiver and test set for sampling responses of a device under test connected to the test set; and signal processing and display means connected to the RF receiver for displaying processed sampled response data; and a lightwave test set, comprising: a lightwave receiver; an optical coupler; a light source; a leveled RF drive circuit connected to the RF source; an optical modulator connected to the light source and to the RF drive circuit; and means for deriving a reference signal proportional to the RF drive signal transmitted through the optical modulator to provide a phase lock and reference signal to the RF receiver of the RF network analyzer system; whereby the RF receiver of the RF network analyzer system is phase locked to the RF signal which drives the optical modulator, and the power in the RF receiver reference channel is proportional to the modulated optical power.
Claim 3
Dependent Claim
60 words
The lightwave testing system of claim 1, further comprising switch means interposed between the leveled RF drive circuit and the optical modulation for connecting the leveled RF drive circuit to the optical modulator and alternatively connecting the leveled RF drive circuit to a front panel output connector to provide a high-power RF output signal for testing electro-optical devices under test.
Claim 4
Dependent Claim
52 words
The lightwave testing system of claim 1, further comprising switch means in the lightwave test set to provide a standby condition, whereby the lightwave test set RF path is completely bypassed, and the RF network analyzer system operates as if no lightwave test set is present for testing electrical devices under test.
References Cited (Backward Citations)
US4816767A
Cited
US4875859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |