US3883703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for conditioning transmission lines utilizing adjustable equalizers and a recording technique
Assignee: RCA Corp
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Filing: 1973-11-12
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Granted: 1975-05-13
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Expires: 1993-11-12
Abstract
Abstract A method is disclosed for conditioning transmission lines for a desired response. The method utilizes pre-recorded test signals transmitted over the unequalized transmission line. The response of the unequalized line to the test signal is recorded. The recorded response is then played through an adjustable equalizer off-line and the equalizer is adjusted for a particular response. The equalizer is then inserted in the transmission line.
Inventors
- 👤 Joseph Kenneth Unger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:07
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
102 words
A method for conditioning a transmission line with an adjustable equalizer device, said transmission line linking two communications stations, said method comprising the steps of: transmitting a magnetically pre-recorded test signal from one station to the other station over the unequalized transmission line linking said two stations; recording the received signal on a magnetic storage medium at said other station in response to said test signal; playing said recorded received signal through said equalizer device off-line; adjusting said equalizer device for a desired response to said recorded received signal; and inserting said adjusted equalizer in said transmission line between said two stations.
Claim 2
Independent Claim
102 words
A method for conditioning a transmission line with an adjustable equalizer device, said transmission line linking two communications stations, said method comprising the steps of: transmitting a magnetically pre-recorded test signal from one station to the other station over the unequalized transmission line linking said two stations; recording the received signal on a magnetic storage medium at said other station in response to said test signal; playing said recorded received signal through said equalizer device off-line; adjusting said equalizer device for a desired response to said recorded received signal; and inserting said adjusted equalizer in said transmission line between said two stations.
Claim 3
Dependent Claim
23 words
The method according to claim 1 wherein said equalizer is adjusted for a desired amplitude response prior to insertion between said two stations.
Claim 4
Dependent Claim
38 words
The method according to claim 2 wherein said equalizer is adjusted for a desired signal delay response after being adjusted for said desired amplitude response and prior to the step of inserting said equalizer between said two stations.
Claim 5
Dependent Claim
21 words
The method according to claim 3 wherein at least a portion of said pre-recorded test signal comprises a varying frequenCy signal.
Claim 6
Dependent Claim
24 words
The method according to claim 4 wherein said equalizer is inserted between said two stations at a control station located between said two stations.
Claim 7
Independent Claim
228 words
A method for conditioning first and second transmission lines respectively with first and second adjustable equalizer devices, said first transmission line linking a first communications station to a second communications station, said second tramsmission line linking said second communications station to said first communications station, said method comprising the steps of: transmitting a magnetically pre-recorded test signal from said first station to said second station over the unequalized first transmission line; recording the received signal on a magnetic storage medium at said second station in response to said test signal; playing said received signal recorded at said second station through said first equalizer device off-line; adjusting said first equalizer device for a desired response to said signal recorded at said second station; inserting said adjusted equalizer device in said first transmission line between said first and second stations; transmitting said magnetically pre-recorded test signal from said second station to said first station over the unequalized second transmission line; magnetically recording the received signal at said first station in response to said test signal transmitted from said second station; playing said received signal recorded at said first station through said second equalizer device off-line; adjusting said second equalizer device for a desired response to said signal recorded at said first station; and inserting said adjusted second equalizer device in said second transmission line between said second and first stations.
Claim 8
Independent Claim
228 words
A method for conditioning first and second transmission lines respectively with first and second adjustable equalizer devices, said first transmission line linking a first communications station to a second communications station, said second tramsmission line linking said second communications station to said first communications station, said method comprising the steps of: transmitting a magnetically pre-recorded test signal from said first station to said second station over the unequalized first transmission line; recording the received signal on a magnetic storage medium at said second station in response to said test signal; playing said received signal recorded at said second station through said first equalizer device off-line; adjusting said first equalizer device for a desired response to said signal recorded at said second station; inserting said adjusted equalizer device in said first transmission line between said first and second stations; transmitting said magnetically pre-recorded test signal from said second station to said first station over the unequalized second transmission line; magnetically recording the received signal at said first station in response to said test signal transmitted from said second station; playing said received signal recorded at said first station through said second equalizer device off-line; adjusting said second equalizer device for a desired response to said signal recorded at said first station; and inserting said adjusted second equalizer device in said second transmission line between said second and first stations.
Claim 9
Dependent Claim
31 words
The method according to claim 6 wherein said first and second equalizers are adjusted for a desired amplitude response prior to being inserted respectively into said first and second transmission lines.
Claim 10
Dependent Claim
50 words
The method according to claim 7 wherein said first and second equalizers are adjusted for a desired signal delay response after having been adjusted for their respective desired amplitude responses and prior to the steps of inserting said first and second equalizers into said first and second transmission lines respectively.
Claim 11
Dependent Claim
20 words
The method according to claim 8 wherein at least a portion of said test signal comprises a varying frequency signal.
Claim 12
Dependent Claim
34 words
The method according to claim 9 wherein said adjusted first and second equalizers are inserted respectively in said first and second transmission lines at a control station located between said first and second stations.
Claim 13
Independent Claim
548 words
A method for conditioning first and second transmission lines with a plurality of adjustable equalizer devices, said first transmission line linking a first communications station to a second communication station and passing through a control station between said first and second communications stations, said second transmission line linking said second communications station to said first communications station and passing through said control station, said first and second communications stations each having a loop key for connecting said first transmission line to said second transmission line, said method comprising the steps of: a. transmitting a magnetically pre-recorded test signal from said first station over a first portion of the unequalized first transmission line; b. recording on a magnetic storage medium the signal received at said control station from said first portion of said first transmission line in response to said pre-recorded test signal transmitted in step (a); c. playing said signal recorded in step (b) through a first equalizer device off-line; d. adjusting said first equalizer device for a desired response to said signal recorded in step (b); e. inserting said first equalizer in said first portion of said first transmission line at said coNtrol station; f. closing the loop key at said first station; g. transmitting said magnetically pre-recorded test signal from said control station toward said first station over a first portion of said second transmission line; h. recording on a magnetic storage medium the signal received at said control station over the path comprising said first portion of said second transmission line, said first station loop key, said first portion of said first transmission line and said first equalizer in response to said test signal transmitted in step (g); i. playing said signal recorded in step (h) through a second equalizer device off-line; j. adjusting said second equalizer for a desired response; k. inserting said second equalizer in said first portion of second transmission line at said control station; l. transmitting said magnetically pre-recorded test signal from said second station over a second portion of said unequalized second transmission line; m. recording on a magnetic storage medium the signal received at said control station from said second transmission line in response to the signal transmitted in step (l); n. playing said signal recorded in step (m) through a third equalizer device off-line; o. adjusting said third equalizer device for a desired response to said signal recorded in step (m); p. inserting said third equalizer in said second transmission line at said control station; q. closing the loop key at said second station; r. transmitting said magnetically pre-recorded test signal from said control station toward said second station over a second unequalized portion of said first transmission line; s. recording on a magnetic storage medium the signal received at said control station over the path comprising said second portion of said first transmission line, said second station loop key, said second portion of said second transmission line and said third equaliizer device in response to the signal transmitted in step (r); t. playing said signal recorded in step (s) through a fourth equalizer device off-line; u. adjusting said fourth equalizer device for a desired response to said signal recorded in step (s); and v. inserting said fourth equalizer in said first transmission line at said control station.
Claim 14
Independent Claim
548 words
A method for conditioning first and second transmission lines with a plurality of adjustable equalizer devices, said first transmission line linking a first communications station to a second communication station and passing through a control station between said first and second communications stations, said second transmission line linking said second communications station to said first communications station and passing through said control station, said first and second communications stations each having a loop key for connecting said first transmission line to said second transmission line, said method comprising the steps of: a. transmitting a magnetically pre-recorded test signal from said first station over a first portion of the unequalized first transmission line; b. recording on a magnetic storage medium the signal received at said control station from said first portion of said first transmission line in response to said pre-recorded test signal transmitted in step (a); c. playing said signal recorded in step (b) through a first equalizer device off-line; d. adjusting said first equalizer device for a desired response to said signal recorded in step (b); e. inserting said first equalizer in said first portion of said first transmission line at said coNtrol station; f. closing the loop key at said first station; g. transmitting said magnetically pre-recorded test signal from said control station toward said first station over a first portion of said second transmission line; h. recording on a magnetic storage medium the signal received at said control station over the path comprising said first portion of said second transmission line, said first station loop key, said first portion of said first transmission line and said first equalizer in response to said test signal transmitted in step (g); i. playing said signal recorded in step (h) through a second equalizer device off-line; j. adjusting said second equalizer for a desired response; k. inserting said second equalizer in said first portion of second transmission line at said control station; l. transmitting said magnetically pre-recorded test signal from said second station over a second portion of said unequalized second transmission line; m. recording on a magnetic storage medium the signal received at said control station from said second transmission line in response to the signal transmitted in step (l); n. playing said signal recorded in step (m) through a third equalizer device off-line; o. adjusting said third equalizer device for a desired response to said signal recorded in step (m); p. inserting said third equalizer in said second transmission line at said control station; q. closing the loop key at said second station; r. transmitting said magnetically pre-recorded test signal from said control station toward said second station over a second unequalized portion of said first transmission line; s. recording on a magnetic storage medium the signal received at said control station over the path comprising said second portion of said first transmission line, said second station loop key, said second portion of said second transmission line and said third equaliizer device in response to the signal transmitted in step (r); t. playing said signal recorded in step (s) through a fourth equalizer device off-line; u. adjusting said fourth equalizer device for a desired response to said signal recorded in step (s); and v. inserting said fourth equalizer in said first transmission line at said control station.
Claim 15
Dependent Claim
30 words
The method according to claim 11 wherein said first, second, third and fourth equalizer devices are adjusted for a desired amplitude response in steps (d), (j), (o), and (u) respectively.
Claim 16
Dependent Claim
37 words
The method according to claim 12 wherein said first, second, third and fourth equalizer devices are adjusted for a desired signal delay response in steps (d), (j), (o) and (u) respectively after said respective amplitude response adjustments.
Claim 17
Dependent Claim
29 words
The method according to claim 13 wherein at least a portion of said pre-recorded test signal transmitted in steps (a), (g), (l) and (r) comprises a swept frequency signal.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |