GB812588A - Improvements in or relating to transmission measuring sets for electric communication circuits - Google Patents

Improvements in or relating to transmission measuring sets for electric communication circuits

Info

Publication number
GB812588A
GB812588A GB38288/56A GB3828856A GB812588A GB 812588 A GB812588 A GB 812588A GB 38288/56 A GB38288/56 A GB 38288/56A GB 3828856 A GB3828856 A GB 3828856A GB 812588 A GB812588 A GB 812588A
Authority
GB
United Kingdom
Prior art keywords
relating
communication circuits
electric communication
transmission measuring
measuring sets
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
GB38288/56A
Inventor
Ian Barry Vaughan Frost
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
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB812588A publication Critical patent/GB812588A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing
    • H04B3/48—Testing attenuation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

812,588. Voltage, transmission level, measuring. STANDARD TELEPHONES & CABLES Ltd. Dec. 14, 1956, No. 38288/56. Class 37. In the receiver of a transmission measuring set, the A.C. signal is applied to the input 1, 2 of a two-stage transistor amplifier having a negative feedback path which includes a rectifier bridge 19 with a D.C. meter 20 across it. The negative feedback increases the output impedance so that the output is substantially independent of the input frequency over the range. Reference has been directed by the Comptroller to Specification 787,691.
GB38288/56A 1956-12-14 Improvements in or relating to transmission measuring sets for electric communication circuits Expired GB812588A (en)

Publications (1)

Publication Number Publication Date
GB812588A true GB812588A (en) 1959-04-29

Family

ID=1745222

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38288/56A Expired GB812588A (en) 1956-12-14 Improvements in or relating to transmission measuring sets for electric communication circuits

Country Status (1)

Country Link
GB (1) GB812588A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259782A (en) * 1991-09-19 1993-03-24 Nokia Mobile Phones Ltd Detecting RF signals

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259782A (en) * 1991-09-19 1993-03-24 Nokia Mobile Phones Ltd Detecting RF signals
US5404585A (en) * 1991-09-19 1995-04-04 Nokia Mobile Phones Ltd. Power detector that employs a feedback circuit to enable class B operation of a detector transistor
GB2259782B (en) * 1991-09-19 1996-04-10 Nokia Mobile Phones Ltd Power detector

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