GB1573643A - Frequency multiplex telecommunications systems - Google Patents

Frequency multiplex telecommunications systems Download PDF

Info

Publication number
GB1573643A
GB1573643A GB12711/77A GB1271177A GB1573643A GB 1573643 A GB1573643 A GB 1573643A GB 12711/77 A GB12711/77 A GB 12711/77A GB 1271177 A GB1271177 A GB 1271177A GB 1573643 A GB1573643 A GB 1573643A
Authority
GB
United Kingdom
Prior art keywords
frequency
link
measuring
fed
digital
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
GB12711/77A
Other languages
English (en)
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.)
Siemens Corp
Original Assignee
Siemens Corp
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 Siemens Corp filed Critical Siemens Corp
Publication of GB1573643A publication Critical patent/GB1573643A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/10—Control of transmission; Equalising by pilot signal
    • 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)
  • Measurement Of Resistance Or Impedance (AREA)
  • Filters And Equalizers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
GB12711/77A 1976-03-26 1977-03-25 Frequency multiplex telecommunications systems Expired GB1573643A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2613054A DE2613054C2 (de) 1976-03-26 1976-03-26 Schaltungsanordnung zum Entzerren der Dämpfungskurve einer Nachrichtenübertragungsstrecke

Publications (1)

Publication Number Publication Date
GB1573643A true GB1573643A (en) 1980-08-28

Family

ID=5973576

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12711/77A Expired GB1573643A (en) 1976-03-26 1977-03-25 Frequency multiplex telecommunications systems

Country Status (5)

Country Link
US (1) US4176317A (enExample)
JP (1) JPS52117506A (enExample)
DE (1) DE2613054C2 (enExample)
FR (1) FR2345861A1 (enExample)
GB (1) GB1573643A (enExample)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2817646B2 (de) * 1978-04-21 1980-05-29 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren und Einrichtung zur Streckenmessung in elektrischen Nachrichtenübertragungssystemen
US4303896A (en) * 1980-05-21 1981-12-01 The Babcock & Wilcox Company Wide range data cable equalizer
GB2090984B (en) * 1981-01-08 1985-02-06 Hewlett Packard Ltd Measuring the frequency response of an element or elements in a digital transmission path
US4627071A (en) * 1984-11-09 1986-12-02 Rockwell International Corporation Distortion analyzer for quadrature demodulated data
JPH06779B2 (ja) * 1985-06-10 1994-01-05 武田薬品工業株式会社 チアゾリジオン誘導体およびそれを含んでなる医薬組成物
DE3681379D1 (de) * 1985-07-16 1991-10-17 Matsushita Electric Industrial Co Ltd Uebertragungs-/empfangssystem fuer ein bezugssignal zur geisterbildausloeschung.
US5059915A (en) * 1989-12-01 1991-10-22 Wiltron Company Vector network analyzer RF pulse profiling method and apparatus
US6873827B1 (en) 1998-09-28 2005-03-29 Nokia Corporation Method and apparatus for providing feeder cable insertion loss detection in a transmission system without interfering with normal operation

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE964332C (de) * 1955-05-25 1957-05-23 Siemens Ag Verfahren zur Erzeugung einer aus einer groesseren Anzahl von Einzelfrequenzen bestehenden Frequenzfolge
US2967998A (en) * 1956-08-22 1961-01-10 Hurvitz Hyman Non-scan spectrum analyzer
US2972108A (en) * 1959-03-17 1961-02-14 Jr Robert R Stone Frequency measuring system employing frequency comparison
DE1126934B (de) * 1961-03-29 1962-04-05 Telefunken Patent Verfahren zur Gewinnung des Einstellkriteriums fuer Orthogonalentzerrer einer Vielkanal-Traegerfrequenz-UEbertragungsstrecke
US3654554A (en) * 1963-01-29 1972-04-04 Sperry Rand Corp Secure pulse compression coding system
NL151596B (nl) * 1964-10-06 1976-11-15 Philips Nv Communicatiestelsel voor de tweedraadsoverdracht van signalen tussen een beginpost en een eindpost over een transmissieleiding.
US3415952A (en) * 1964-12-04 1968-12-10 Plessey Uk Ltd Automatic power level control for radiotelephony communication systems including a repeater station
NL6612386A (enExample) * 1966-09-02 1968-03-04
FR2068850A5 (enExample) * 1969-10-03 1971-09-03 Cit Alcatel
DE2013475C3 (de) * 1970-03-20 1975-12-11 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zur Einstellung eines Kosinus- oder Echoentzerrers in einem Trägerfrequenz-Übertragungssystem
DE2247190C3 (de) * 1972-09-26 1980-12-04 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zur Einstellung der Trägerphase bei der Übertragung von Signalen
CH559983A5 (enExample) * 1972-12-28 1975-03-14 Zellweger Uster Ag
DE2360930C2 (de) * 1973-12-06 1975-05-07 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zur Auswahl eines Diversitykanals

Also Published As

Publication number Publication date
US4176317A (en) 1979-11-27
FR2345861B1 (enExample) 1981-12-24
DE2613054A1 (de) 1977-09-29
FR2345861A1 (fr) 1977-10-21
DE2613054C2 (de) 1983-04-07
JPS52117506A (en) 1977-10-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee