ES452438A1 - Instalacion telefonica de radiodifusion de alta frecuencia con disposicion de mensaje de alarma. - Google Patents

Instalacion telefonica de radiodifusion de alta frecuencia con disposicion de mensaje de alarma.

Info

Publication number
ES452438A1
ES452438A1 ES452438A ES452438A ES452438A1 ES 452438 A1 ES452438 A1 ES 452438A1 ES 452438 A ES452438 A ES 452438A ES 452438 A ES452438 A ES 452438A ES 452438 A1 ES452438 A1 ES 452438A1
Authority
ES
Spain
Prior art keywords
carrier frequency
translation
modulated
frequency
signal
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
ES452438A
Other languages
English (en)
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.)
Hasler AG
Original Assignee
Hasler 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
Application filed by Hasler AG filed Critical Hasler AG
Publication of ES452438A1 publication Critical patent/ES452438A1/es
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B27/00—Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations
    • G08B27/006—Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations with transmission via telephone network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/76—Wired systems
    • H04H20/77—Wired systems using carrier waves
    • H04H20/81—Wired systems using carrier waves combined with telephone network over which the broadcast is continuously available

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Circuits Of Receivers In General (AREA)
ES452438A 1975-12-23 1976-10-15 Instalacion telefonica de radiodifusion de alta frecuencia con disposicion de mensaje de alarma. Expired ES452438A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1667675A CH593593A5 (online.php) 1975-12-23 1975-12-23

Publications (1)

Publication Number Publication Date
ES452438A1 true ES452438A1 (es) 1977-11-01

Family

ID=4419295

Family Applications (1)

Application Number Title Priority Date Filing Date
ES452438A Expired ES452438A1 (es) 1975-12-23 1976-10-15 Instalacion telefonica de radiodifusion de alta frecuencia con disposicion de mensaje de alarma.

Country Status (3)

Country Link
CH (1) CH593593A5 (online.php)
DE (1) DE2645330A1 (online.php)
ES (1) ES452438A1 (online.php)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324517A1 (de) * 1983-07-07 1985-01-17 ANT Nachrichtentechnik GmbH, 7150 Backnang Notrufsystem

Also Published As

Publication number Publication date
CH593593A5 (online.php) 1977-12-15
DE2645330A1 (de) 1977-07-07

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