GB1446351A - Telecommunications transmission systems - Google Patents

Telecommunications transmission systems

Info

Publication number
GB1446351A
GB1446351A GB3757773A GB3757773A GB1446351A GB 1446351 A GB1446351 A GB 1446351A GB 3757773 A GB3757773 A GB 3757773A GB 3757773 A GB3757773 A GB 3757773A GB 1446351 A GB1446351 A GB 1446351A
Authority
GB
United Kingdom
Prior art keywords
mhz
khz
basic
frequency
pairs
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
GB3757773A
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 AG
Original Assignee
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 DE19722239714 external-priority patent/DE2239714C3/en
Priority claimed from DE19732325099 external-priority patent/DE2325099C3/en
Priority claimed from DE19732335283 external-priority patent/DE2335283C3/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB1446351A publication Critical patent/GB1446351A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/04—Frequency-transposition arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite

Abstract

1446351 Television transmission SIEMENS AG 8 Aug 1973 [11 Aug 1972 17 May 1973 11 July 1973] 37577/73 Heading H4M To transmit television programmes in frequency bands normally reserved for telecommunication channels in a carrier frequency system the programmes are first modulated on a common carrier frequency of 6799 kHz then converted in pairs to occupy a position between 20 and 40 MHz allotted to the basic quinary group of the system at which the carriers (e.g. 31041 and 32759 kHz) are separated by substantially 1À7 MHz and are centred on a frequency (31900) which is an integral multiple of 1À1 MHz, further pairs of TV channels being converted to positions each side of the basic quinary group by carrier frequencies which are different multiples of 2À2 MHz, those above the basic quinary group being spaced by 9 times 2À2 MHz. In this way interference products lie in frequency bands between channel pairs. All the carrier frequencies above 6799 kHz are provided by multiplication of a fundamental 0À44 MHz oscillator (Fig. 3, not shown).
GB3757773A 1972-08-11 1973-08-08 Telecommunications transmission systems Expired GB1446351A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19722239714 DE2239714C3 (en) 1972-08-11 1972-08-11 Method for the joint transmission of television and telephone bands on broadband TF systems
DE19732325099 DE2325099C3 (en) 1973-05-17 1973-05-17 Method for the joint transmission of television and telephone bands on broadband TF systems
DE19732335283 DE2335283C3 (en) 1973-07-11 Circuit arrangement for carrying out the method for the joint transmission of television and telephone bands on broadband TF systems

Publications (1)

Publication Number Publication Date
GB1446351A true GB1446351A (en) 1976-08-18

Family

ID=27184633

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3757773A Expired GB1446351A (en) 1972-08-11 1973-08-08 Telecommunications transmission systems

Country Status (6)

Country Link
JP (1) JPS531127B2 (en)
FR (1) FR2195879B1 (en)
GB (1) GB1446351A (en)
IT (1) IT992878B (en)
NL (1) NL165630C (en)
SE (1) SE391850B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2530394B1 (en) * 1982-07-13 1986-05-16 Thomson Csf MULTIPLEXING AND DEMULTIPLEXING DEVICE FOR VIDEO CHANNELS

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH524936A (en) * 1970-01-29 1972-06-30 Siemens Ag Method for frequency division multiplex transmission of telephone and videophone channels

Also Published As

Publication number Publication date
NL165630B (en) 1980-11-17
FR2195879B1 (en) 1979-03-16
NL7311124A (en) 1974-02-13
JPS4992918A (en) 1974-09-04
JPS531127B2 (en) 1978-01-14
SE391850B (en) 1977-02-28
IT992878B (en) 1975-09-30
NL165630C (en) 1981-04-15
FR2195879A1 (en) 1974-03-08

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee