EP0138613A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and apparatus for monitoring suitability of a transmission path for transmission of digital data signals
Assignee: Tektronix Inc
•
Filing: 1984-10-16
•
Granted: —
•
Expires: 2004-10-16
Abstract
Abstract The suitability of a transmission path (16 or 18) for transmission of digital data is monitored by transmitting a test signal over the transmission path. The test signal is composed of a succession of video signal lines each including a horizontal sync pulse and a pattern of digital 1's and 0's at a predetermined frequency and occurring on each line at the same data position relative to the horizontal sync pulse. The patterns comprise a reference pattern of alternating 1 's and 0's and test pattern of 1's and 0's at random or in a sequence known to be disruptive to the transmission path. The test signal is received and is displayed on a waveform monitor (28) with the reference pattern and the test pattern interleaved with the complement of the reference pattern and complement of the test pattern, so that the four patterns are superimposed and enclose a generally eye-shaped area.
Inventors
- 👤 John L. Judge
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 09:29
CPC Classifications
H; H04; H04N; H04N17/00; H04N17/004
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
166 words
A method of monitoring suitablity of a transmission path for transmission of digital data referenced to a clock signal comprising an alternating sequence of digital 1's and digital O's at a predetermined frequency, said method comprising transmitting a test signal over the transmission path, the test signal being composed of a succession of video signal lines each including a horizontal sync pulse and a pattern of digital 1's and 0's at said predetermined frequency and occurring on each line at the same data positions relevant to the horizontal sync pulse, the patterns comprising a reference pattern of alternating 1's and 0's and a test pattern of 1's and 0's at random or in a sequence known to be disruptive to the transmission path, and the method also comprising receiving the transmitted test signal and displaying the received test signal on a waveform monitor with the reference pattern and the test pattern interleaved with the complement of the reference pattern and the complement of the test pattern.
Claim 2
Independent Claim
166 words
A method of monitoring suitablity of a transmission path for transmission of digital data referenced to a clock signal comprising an alternating sequence of digital 1's and digital O's at a predetermined frequency, said method comprising transmitting a test signal over the transmission path, the test signal being composed of a succession of video signal lines each including a horizontal sync pulse and a pattern of digital 1's and 0's at said predetermined frequency and occurring on each line at the same data positions relevant to the horizontal sync pulse, the patterns comprising a reference pattern of alternating 1's and 0's and a test pattern of 1's and 0's at random or in a sequence known to be disruptive to the transmission path, and the method also comprising receiving the transmitted test signal and displaying the received test signal on a waveform monitor with the reference pattern and the test pattern interleaved with the complement of the reference pattern and the complement of the test pattern.
Claim 3
Independent Claim
179 words
An apparatus for use in monitoring suitability of a transmission path for transmission of digital data, said apparatus comprising a signal generator for generating a test signal composed of a succession of video signal lines each including a horizontal sync pulse and a pattern of digital 1's and O's at a predetermined frequency and occurring on each line at the same data positions relative to the horizontal sync pulse, the patterns comprising a reference pattern of alternating 1's and 0's and a test pattern of l's and 0's at random or in a sequence known to be disruptive to the transmission path, so that the when the test signal is transmitted over a transmission path under test and a received signal is displayed on a waveform monitor with the reference pattern and the test pattern interleaved with the complement of the reference pattern and the complement of the test pattern, the four patterns are superimposed and enclose a generally eye-shaped area, the configuration of which area depends on the suitability of the transmission path for transmission of digitial data.
Claim 4
Independent Claim
179 words
An apparatus for use in monitoring suitability of a transmission path for transmission of digital data, said apparatus comprising a signal generator for generating a test signal composed of a succession of video signal lines each including a horizontal sync pulse and a pattern of digital 1's and O's at a predetermined frequency and occurring on each line at the same data positions relative to the horizontal sync pulse, the patterns comprising a reference pattern of alternating 1's and 0's and a test pattern of l's and 0's at random or in a sequence known to be disruptive to the transmission path, so that the when the test signal is transmitted over a transmission path under test and a received signal is displayed on a waveform monitor with the reference pattern and the test pattern interleaved with the complement of the reference pattern and the complement of the test pattern, the four patterns are superimposed and enclose a generally eye-shaped area, the configuration of which area depends on the suitability of the transmission path for transmission of digitial data.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.