DE483515C - Circuit arrangement for telegraphing with alternating current via cable - Google Patents

Circuit arrangement for telegraphing with alternating current via cable

Info

Publication number
DE483515C
DE483515C DES65538D DES0065538D DE483515C DE 483515 C DE483515 C DE 483515C DE S65538 D DES65538 D DE S65538D DE S0065538 D DES0065538 D DE S0065538D DE 483515 C DE483515 C DE 483515C
Authority
DE
Germany
Prior art keywords
telegraphing
circuit arrangement
alternating current
transmitter
cable
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
DES65538D
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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
Priority claimed from DES62402D external-priority patent/DE473139C/en
Application filed by Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Priority to DES65538D priority Critical patent/DE483515C/en
Priority to US17315A priority patent/US1669041A/en
Application granted granted Critical
Publication of DE483515C publication Critical patent/DE483515C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/04—Modulator circuits; Transmitter circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Description

Schaltungsanordnung zum Telegraphieren mit Wechselstrom über Kabel In dem Patent ¢73 139 ist gezeigt worden, daß beim Telegraphieren mit Wechselstrom über lange Kabel der Kabelstrom sich zusammensetzt aus einem Gleichstromimpuls (flüchtige Komponente) oder Ausgleichstrom mit der darüber gelagerten Trägerwelle. Um hohe Telegraphiergeschwindigkeiten zu erreichen, ist es wichtig, den tieffrequenten Gleichstromimpuls zu unterdrücken.Circuit arrangement for telegraphing with alternating current over cables In the patent [73,139 ] it has been shown that when telegraphing with alternating current over long cables, the cable current is composed of a direct current pulse (volatile component) or equalizing current with the carrier wave superimposed on it. In order to achieve high telegraph speeds, it is important to suppress the low-frequency direct current pulse.

Entsprechend dem Hauptpatent wird dies dadurch erreicht, daß am Leitungsende vor den Empfangsapparat ein Übertrager eingeschaltet wird, der dem Kabel und dem Empfangsapparat für die Trägerfrequenz angepaßt ist, den Ausgleichstrom aber stark dämpft.According to the main patent, this is achieved in that at the end of the line a transmitter is switched on in front of the receiving apparatus, the cable and the Receiver is adapted for the carrier frequency, but the equalizing current is strong dampens.

Man kann nun die Wirkung des Ausgleichstromes auf den Empfangsapparat ebenfalls herabsetzen, wenn der Übertrager am Anfang des Kabels hinter dem Sender angeordnet wird. Dies ist in Abb. 1 dargestellt. Der Sender s kann mit Hilfe des Tasters t an die Primärwicklung des Übertragers u angelegt werden. Die Sekundärwicklung ist mit dem Kabel k verbunden, an dessen fernem Ende der Empfangsapparat zu denken ist. Eine erhebliche Verbesserung der Wirkung erhält man dagegen durch Verwendung von Übertragern sowohl am Sender- als auch am Empfangsende.One can now see the effect of the equalizing current on the receiving apparatus also reduce if the transformer is at the beginning of the cable behind the transmitter is arranged. This is shown in Fig. 1. The sender s can use the Button t can be applied to the primary winding of the transformer u. The secondary winding is connected to the cable k, think of the receiving apparatus at its far end is. On the other hand, a considerable improvement in the effect is obtained through use of transmitters at both the sender and the receiving end.

Auf der Zeichnung sind z. B. zwei Oszillogramme veranschaulicht, von denen das Oszillogramm a bei ,Anordnung des übertragers hinter dem Sender aufgenommen ist und das Oszill@ogramm 3 bei Anordnung der Übertrager an beiden Enden der Telegraphenlinie. Wie aus den unteren Kurvenlinien beider Oszillogramme, welche das Empfangszeichen darstellen, während die oberen Kurven die Sendezeichen veranschaulichen, zu ersehen ist, erfolgt die Übertragung der Zeichen bei dem Oszillogramm 3 fast vollständig' regelmäßig, ohne daß ein Einfuß des Ausgleichstromes zu bemerken wäre, während bei dem Oszillogramm a die Wirkung des Ausgleichstromes noch sehr stark bemerkbar ist.On the drawing are z. B. illustrates two oscillograms from where the oscillogram a is included, arrangement of the transmitter behind the transmitter and the Oszill @ ogramm 3 with the arrangement of the transformers at both ends of the telegraph line. As from the lower curve lines of both oscillograms, which show the received signal while the curves above show the send signals is, the characters are transmitted almost completely in oscillogram 3 ' regularly, without any noticeable influence of the equalizing current, while at the effect of the equalizing current is still very noticeable on the oscillogram a.

Claims (1)

PATENTANSPRÜCFIE: i. Schaltungsänordnung zum Telegraphieren mit Wechselstrom über Kabel nach Patent q.73139, dadurch gekennzeichnet, daß. der Sender an das Kabel mittels eines Übertragers angeschlossen ist, der einerseits an den Sender, andererseits an das Kabel angepaßt ist für die Trägerwelle, zum Zwecke, den Ausgleichstrom (Gleichstromimpuls) stark zu dämpfen. a. Schaltungsanordnung nach Anspruch i, dadurch gekennzeichnet, daß Sender und Empfänger mittels Übertrager an das Kabel angeschlossen sind.PATENT CLAIM: i. Circuit arrangement for telegraphing with alternating current via cable according to patent q.73139, characterized in that. the transmitter to the cable is connected by means of a transmitter, on the one hand to the transmitter, on the other hand is adapted to the cable for the carrier wave, for the purpose of compensating current (direct current pulse) to dampen heavily. a. Circuit arrangement according to Claim i, characterized in that that the transmitter and receiver are connected to the cable by means of a transmitter.
DES65538D 1923-03-16 1924-03-25 Circuit arrangement for telegraphing with alternating current via cable Expired DE483515C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DES65538D DE483515C (en) 1923-03-16 1924-03-25 Circuit arrangement for telegraphing with alternating current via cable
US17315A US1669041A (en) 1924-03-25 1925-03-21 Alternating-current cable transmitter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DES62402D DE473139C (en) 1923-03-16 1923-03-16 Receiving circuit for alternating current telegraphy over long submarine cables
DES65538D DE483515C (en) 1923-03-16 1924-03-25 Circuit arrangement for telegraphing with alternating current via cable

Publications (1)

Publication Number Publication Date
DE483515C true DE483515C (en) 1929-10-02

Family

ID=25995659

Family Applications (1)

Application Number Title Priority Date Filing Date
DES65538D Expired DE483515C (en) 1923-03-16 1924-03-25 Circuit arrangement for telegraphing with alternating current via cable

Country Status (1)

Country Link
DE (1) DE483515C (en)

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