ES182502A1 - METHOD OR MEANS FOR THE TRANSMISSION OF LOW FREQUENCY CALLS IN TELECOMMUNICATION SYSTEMS - Google Patents

METHOD OR MEANS FOR THE TRANSMISSION OF LOW FREQUENCY CALLS IN TELECOMMUNICATION SYSTEMS

Info

Publication number
ES182502A1
ES182502A1 ES0182502A ES182502A ES182502A1 ES 182502 A1 ES182502 A1 ES 182502A1 ES 0182502 A ES0182502 A ES 0182502A ES 182502 A ES182502 A ES 182502A ES 182502 A1 ES182502 A1 ES 182502A1
Authority
ES
Spain
Prior art keywords
transmission
telecommunication systems
frequency
low frequency
modulation
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
ES0182502A
Other languages
Spanish (es)
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.)
ESTANDAR ELECTRICA S A
Original Assignee
ESTANDAR ELECTRICA S A
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 ESTANDAR ELECTRICA S A filed Critical ESTANDAR ELECTRICA S A
Priority to ES0182502A priority Critical patent/ES182502A1/en
Publication of ES182502A1 publication Critical patent/ES182502A1/en
Expired legal-status Critical Current

Links

Landscapes

  • Transmitters (AREA)
  • Transceivers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

En un método y medios para la transmisión de llamadas de baja frecuencia en sistemas de telecomunicación un método de transmisión de llamadas de baja frecuencia que comprende un sistema transmisor en el cual se disponen medios para producir la modificación de una corriente portadora por modulación a una frecuencia relativamente baja y medios para introducir en la modulación importantes armónicos de la citada frecuencia de llamada que aseguren una gran profundidad de modulación de la mencionada corriente portadora, y un sistema receptor en el que se disponen medios para seleccionar uno o más de los citados armónicos producidos en el referido sistema transmisor y medios para que la corriente de dichos armónicos seleccionados actúe los dispositivos de llamada.In a method and means for the transmission of low-frequency calls in telecommunication systems, a method of transmission of low-frequency calls comprising a transmitter system in which means are arranged to produce the modification of a carrier current by modulation to a frequency relatively low and means to introduce into the modulation important harmonics of said calling frequency that ensure a great depth of modulation of said carrier current, and a receiver system in which means are provided to select one or more of said harmonics produced in said transmitter system and means for the current of said selected harmonics to actuate the call devices.

ES0182502A 1944-12-26 1948-02-20 METHOD OR MEANS FOR THE TRANSMISSION OF LOW FREQUENCY CALLS IN TELECOMMUNICATION SYSTEMS Expired ES182502A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES0182502A ES182502A1 (en) 1944-12-26 1948-02-20 METHOD OR MEANS FOR THE TRANSMISSION OF LOW FREQUENCY CALLS IN TELECOMMUNICATION SYSTEMS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES49590744 1944-12-26
ES0182502A ES182502A1 (en) 1944-12-26 1948-02-20 METHOD OR MEANS FOR THE TRANSMISSION OF LOW FREQUENCY CALLS IN TELECOMMUNICATION SYSTEMS

Publications (1)

Publication Number Publication Date
ES182502A1 true ES182502A1 (en) 1948-05-16

Family

ID=38468373

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0182502A Expired ES182502A1 (en) 1944-12-26 1948-02-20 METHOD OR MEANS FOR THE TRANSMISSION OF LOW FREQUENCY CALLS IN TELECOMMUNICATION SYSTEMS

Country Status (1)

Country Link
ES (1) ES182502A1 (en)

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