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DE354701C - Arrangement for high-frequency traffic on parallel double lines operated with almost the same wave - Google Patents

Arrangement for high-frequency traffic on parallel double lines operated with almost the same wave

Info

Publication number
DE354701C
DE354701C DED37710D DED0037710D DE354701C DE 354701 C DE354701 C DE 354701C DE D37710 D DED37710 D DE D37710D DE D0037710 D DED0037710 D DE D0037710D DE 354701 C DE354701 C DE 354701C
Authority
DE
Germany
Prior art keywords
arrangement
same
double lines
parallel double
same wave
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
DED37710D
Other languages
German (de)
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.)
DEUTSCHE TELEPHONWERKE GmbH
Original Assignee
DEUTSCHE TELEPHONWERKE GmbH
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 DEUTSCHE TELEPHONWERKE GmbH filed Critical DEUTSCHE TELEPHONWERKE GmbH
Priority to DED37710D priority Critical patent/DE354701C/en
Application granted granted Critical
Publication of DE354701C publication Critical patent/DE354701C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J1/00Frequency-division multiplex systems
    • H04J1/02Details
    • H04J1/12Arrangements for reducing cross-talk between channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Description

Anordnung zum Hochfrequenzverkehr auf parallelen, mit annähernd gleicher Welle betriebenen Doppelleitungen. Beim Betriebe von Höchfrequenzleitungen für Telephonie und Telegraphie, die arn gleichen Gestänge verlegt sind, tritt eine gegenseitige Induktion auf, die zu Störungen Anlaß gibt und ein unbefugtes Mithören gestattet.Arrangement for high-frequency traffic on parallel, with approximately the same Wave operated double lines. When operating high-frequency lines for telephony and telegraphy, which are laid in the same frame, occurs mutually Induction, which gives rise to interference and allows unauthorized eavesdropping.

Um dies zu vermeiden, werden gemäß der Erfindung die beiden Wellen, die zum Hin-und Rückverkehr auf einer Doppelleitung dienen, derart benutzt, daß diejenige von ihnen, die einer Welle der benachbarten Leitung gleich oder nahezu gleich ist, auch in gleicher Richtung wie letztere verläuft, wobei der Sender als Ausgangspunkt gilt. Auf diese Weise kann eine solche Welle erst am Endpunkt der Leitung, wo sie durch die Leitungsdämpfung schon wesentlich geschwächt ist, in den Empfänger am gleichliegenden Endpunkt der anderen Leitung, der für dieselbe Wellenfrequenz empfänglich ist, eindringen, wobei man es nun durch die bekannten Mittel in der Hand hat, diesen Rest eindringender Energie entweder so klein zu halten oder den Empfänger derart dagegen zu schützen, daß eine ungewollte Wirkung im letzteren nicht mehr auftritt.To avoid this, according to the invention, the two shafts, which are used for round-trip traffic on a double line, used in such a way that that of them which is equal to or close to a wave of the adjacent line is the same, also runs in the same direction as the latter, the transmitter being as The starting point applies. In this way, such a wave can only be reached at the end point of the Line, where it is already considerably weakened by the line attenuation, into the Receiver at the same end point of the other line, which is for the same wave frequency is susceptible to penetrate, which can now be done by the known means in the Hand has to keep this rest of penetrating energy either so small or that To protect the recipient against it in such a way that an undesired effect in the latter does not occur occurs more.

Würde man dagegen die Wellen Wahl- und regellos auf den Hin- und Rückverkehr der para11ellaufendenLeitungen verteilen, sowürde es geschehen, daß zwei gleiche Wellen beider Leitungen in entgegengesetzter Richtung laufen. Dabei würde die Sendewelle der einen Leitung schon am Anfangspunkt der Leitung auf den für diese Welle empfindlichen gleichliegenden Empfänger der anderen Leitung einwirken und mit erheblicher Energie in diesen eindringen, so daß die erwähnten Übelstände auftreten. Die Erfindung benutzt die vorhandeneLeitungsdämpfung als Hilfsmittel, um diese Übelstände zu beseitigen, was insbesondere bei kurzen Leitungen, wo Leitungs-und Wellenkreuzungen nicht anwendbar sind, von Vorteil ist. Der Abstand der Leitungen braucht bei Anwendung der Erfindung selbst bei. größerer über die Leitung gehender Energie nicht vergrößert zu werden.If, on the other hand, one would choose the waves randomly and randomly on the outward and return traffic of the parallel lines, it would happen that two of the same Waves of both lines run in opposite directions. This would be the transmission wave the one line already at the starting point of the line to the one sensitive to this wave equal recipients of the other line act and with considerable energy penetrate into these, so that the abuses mentioned occur. The invention uses the existing line attenuation as an aid to eliminate these deficiencies, which is particularly important for short lines, where line and wave crossings are not applicable are beneficial. The distance between the lines is required when using the invention even at. greater energy going over the line not to be increased.

Claims (1)

PATENTANSPRUCH: Anordnung zum Hochfrequenzverkehr auf parallelen, mit annähernd gleicher Welle betriebenenDoppelleitungen, dadurch gekennzeichnet, daß zwecks Verhinderung der gegenseitigen Induktion die Wellen jeder Doppelleitung dem Hin- und Rückverkehr derart zugeordnet werden, daß gleiche (oder nahezu gleiche) Wellen in gleicher Richtung vom -Sender aus auf beiden Leitungen laufen.PATENT CLAIM: Arrangement for high-frequency traffic on parallel, double lines operated with approximately the same shaft, characterized in that that in order to prevent mutual induction, the waves of each double line be assigned to the outward and return traffic in such a way that the same (or almost the same) Waves run in the same direction from the transmitter on both lines.
DED37710D 1920-06-06 1920-06-06 Arrangement for high-frequency traffic on parallel double lines operated with almost the same wave Expired DE354701C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED37710D DE354701C (en) 1920-06-06 1920-06-06 Arrangement for high-frequency traffic on parallel double lines operated with almost the same wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED37710D DE354701C (en) 1920-06-06 1920-06-06 Arrangement for high-frequency traffic on parallel double lines operated with almost the same wave

Publications (1)

Publication Number Publication Date
DE354701C true DE354701C (en) 1922-06-12

Family

ID=7043735

Family Applications (1)

Application Number Title Priority Date Filing Date
DED37710D Expired DE354701C (en) 1920-06-06 1920-06-06 Arrangement for high-frequency traffic on parallel double lines operated with almost the same wave

Country Status (1)

Country Link
DE (1) DE354701C (en)

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