US4833690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote eye pattern display for digital modems
Assignee: Paradyne Corp
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Filing: 1987-08-18
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Granted: 1989-05-23
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Expires: 2007-08-18
Abstract
Abstract A system for transmission of an eye pattern from a remote modem to a local modem for oscilloscope display includes divider circuitry for adjusting the speed of transmission so as to accommodate the speed of the modem and provide a clear, unflickering oscilloscope display. The system also includes provisions for providing a continuous line impairment display as well as provisions for providing equalizer tap information.
Inventors
- 👤 Edward S. Zuranski
- 👤 David W. Springer
- 👤 Chad Balka
- 👤 William L. Betts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:47
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
153 words
A system for transmission of an eye pattern and other data from an unmanned remote modem to a local modem for oscilloscope display comprising: means for sending a signal from the local modem to the remote modem requesting the eye pattern data to be transmitted; means for transmitting the requested eye pattern data from the remote modem to the local modem; and wherein said local modem further comprises receiver circuitry comprising a demodulator, a first shift register connected to an output of the demodulator, an AND gate having inputs connected to outputs of the shift register, a bit divider connected to another input of the AND gate, a second bit register connected to output of the first shift register and the AND gate, one or more digital to analog converters connected to X-Y outputs of the second register, and an oscilloscope connected to outputs of said one or more digital to analog converters.
Claim 2
Independent Claim
153 words
A system for transmission of an eye pattern and other data from an unmanned remote modem to a local modem for oscilloscope display comprising: means for sending a signal from the local modem to the remote modem requesting the eye pattern data to be transmitted; means for transmitting the requested eye pattern data from the remote modem to the local modem; and wherein said local modem further comprises receiver circuitry comprising a demodulator, a first shift register connected to an output of the demodulator, an AND gate having inputs connected to outputs of the shift register, a bit divider connected to another input of the AND gate, a second bit register connected to output of the first shift register and the AND gate, one or more digital to analog converters connected to X-Y outputs of the second register, and an oscilloscope connected to outputs of said one or more digital to analog converters.
Claim 3
Dependent Claim
22 words
The system of claim 1 further including means for transmitting requested line impairment data from the remote modem to the local modem.
Claim 4
Dependent Claim
22 words
The system of claim 1 further including means for transmitting requested equalizer tap data from the remote modem to the local modem.
Claim 5
Dependent Claim
22 words
The system of claim 1 wherein said means for transmitting comprises a multiplexer capable of selecting the requested data to be transmitted.
Claim 6
Dependent Claim
44 words
The system of claim 4 wherein said means for transmitting further comprises a module for formatting data received from said multiplexer into X, Y components and a shift register connected to parallel outputs of said formatting module for assembling the data bits into packets.
Claim 7
Dependent Claim
34 words
The system of claim 5 further comprising means for dividing the packet data such that the rate of data transmitted is appropriate for an nonflickering display on an oscilloscope located at the local modem.
Claim 8
Dependent Claim
28 words
The system of claim 2 wherein said line impairment data is multiplexed with said eye pattern data prior to transmission from said remote modem to said local modem.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |