GB1404744A - Variable impedance for use in testing coaxial cables - Google Patents

Variable impedance for use in testing coaxial cables

Info

Publication number
GB1404744A
GB1404744A GB675574A GB675574A GB1404744A GB 1404744 A GB1404744 A GB 1404744A GB 675574 A GB675574 A GB 675574A GB 675574 A GB675574 A GB 675574A GB 1404744 A GB1404744 A GB 1404744A
Authority
GB
United Kingdom
Prior art keywords
coaxial cable
coaxial cables
variable impedance
measuring
testing coaxial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB675574A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB675574A priority Critical patent/GB1404744A/en
Publication of GB1404744A publication Critical patent/GB1404744A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
    • G01R17/10—AC or DC measuring bridges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors

Abstract

1404744 Measuring input impedance of coaxial cable STANDARD TELEPHONES & CABLES Ltd 14 Feb 1974 6755/74 Heading G1U An adjustable impedance unit comprises a coaxial socket, 1, Fig. 1, a short length of coaxial cable 5, two resistors R1, R2, and a potentiometer RV1 with an adjusting knob 8, all mounted inside a metal screen 10 and connected as shown in Fig. 2. In use the unit simulates a coaxial cable having an adjustable impedance and forms part of a bridge Fig. 3, across which a swept r.f. is applied, for measuring the impendance of a coaxial cable under test.
GB675574A 1974-02-14 1974-02-14 Variable impedance for use in testing coaxial cables Expired GB1404744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB675574A GB1404744A (en) 1974-02-14 1974-02-14 Variable impedance for use in testing coaxial cables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB675574A GB1404744A (en) 1974-02-14 1974-02-14 Variable impedance for use in testing coaxial cables

Publications (1)

Publication Number Publication Date
GB1404744A true GB1404744A (en) 1975-09-03

Family

ID=9820186

Family Applications (1)

Application Number Title Priority Date Filing Date
GB675574A Expired GB1404744A (en) 1974-02-14 1974-02-14 Variable impedance for use in testing coaxial cables

Country Status (1)

Country Link
GB (1) GB1404744A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992008993A1 (en) * 1990-11-09 1992-05-29 Cray Research Incorporated Optimizing the electrical length of a signal flow path
GB2292810A (en) * 1994-08-22 1996-03-06 Tektronix Inc Return-loss detector
EP1091218A2 (en) * 1999-10-06 2001-04-11 Norscan Instruments, Ltd. A constant current termination for cable locating tones
FR2918784A1 (en) * 2007-07-13 2009-01-16 Henri Hubin Portable network simulator for implementing echometric pre-locating procedures of defects on high and low voltage energy cables, has coaxial cable coiled such that radius of curvature of cable is of particular value to accept signal
CN109270351A (en) * 2018-10-31 2019-01-25 深圳市菲菱科思通信技术股份有限公司 Simulate cable test circuit and its device
CN115856513A (en) * 2023-02-03 2023-03-28 杭州紫光通信技术股份有限公司 Method, device, storage medium and electronic device for detecting railway cable fault
CN116404382A (en) * 2023-05-29 2023-07-07 成都世源频控技术股份有限公司 Conductor short-circuit type mechanical adjustable attenuator

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992008993A1 (en) * 1990-11-09 1992-05-29 Cray Research Incorporated Optimizing the electrical length of a signal flow path
US5162743A (en) * 1990-11-09 1992-11-10 Cray Research, Inc. Method and apparatus for optimizing the electrical length of a signal flow path
GB2292810A (en) * 1994-08-22 1996-03-06 Tektronix Inc Return-loss detector
GB2292810B (en) * 1994-08-22 1998-03-18 Tektronix Inc Return-loss detector for serial digital source
EP1091218A2 (en) * 1999-10-06 2001-04-11 Norscan Instruments, Ltd. A constant current termination for cable locating tones
EP1091218A3 (en) * 1999-10-06 2003-04-09 Norscan Instruments, Ltd. A constant current termination for cable locating tones
FR2918784A1 (en) * 2007-07-13 2009-01-16 Henri Hubin Portable network simulator for implementing echometric pre-locating procedures of defects on high and low voltage energy cables, has coaxial cable coiled such that radius of curvature of cable is of particular value to accept signal
CN109270351A (en) * 2018-10-31 2019-01-25 深圳市菲菱科思通信技术股份有限公司 Simulate cable test circuit and its device
CN115856513A (en) * 2023-02-03 2023-03-28 杭州紫光通信技术股份有限公司 Method, device, storage medium and electronic device for detecting railway cable fault
CN115856513B (en) * 2023-02-03 2023-06-16 杭州紫光通信技术股份有限公司 Method and device for detecting railway cable faults, storage medium and electronic device
CN116404382A (en) * 2023-05-29 2023-07-07 成都世源频控技术股份有限公司 Conductor short-circuit type mechanical adjustable attenuator
CN116404382B (en) * 2023-05-29 2023-08-08 成都世源频控技术股份有限公司 Conductor short-circuit type mechanical adjustable attenuator

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee