GB785544A - Improvements in or relating to high frequency transmitting systems - Google Patents

Improvements in or relating to high frequency transmitting systems

Info

Publication number
GB785544A
GB785544A GB2256754A GB2256754A GB785544A GB 785544 A GB785544 A GB 785544A GB 2256754 A GB2256754 A GB 2256754A GB 2256754 A GB2256754 A GB 2256754A GB 785544 A GB785544 A GB 785544A
Authority
GB
United Kingdom
Prior art keywords
modulated
fed
carriers
relating
high frequency
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
GB2256754A
Inventor
Thomas Snowden Robson
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB2256754A priority Critical patent/GB785544A/en
Publication of GB785544A publication Critical patent/GB785544A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/06—Systems for the simultaneous transmission of one television signal, i.e. both picture and sound, by more than one carrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Amplitude Modulation (AREA)

Abstract

785,544. Multiplex radio signalling. ELECTRIC & MUSICAL INDUSTRIES, Ltd. July 29, 1955 [Aug. 4, 1954], No. 22567/54. Class 40 (5). In a system for transmitting television and the accompanying sound signals at U.H.F., the two carriers, which are of closely related frequency, are amplitude modulated at low level, combined, and then amplified together by a klystron amplifier. The two carriers derived at 3 and 6 from crystal oscillators are modulated at 2 and 5 by the video and audio signals respectively. The modulated outputs are fed to a combining filler 7 and thence to the input cavity 9 of a klystron amplifier which is coupled to the aerial by cavity 11. To reduce cross-talk, overall negative feed-back of signal components up to 20 kc/s. is applied via frequency selective circuits 14, 15; or a part of the video signal may be fed in anti-phase to the audio modulator and vice versa.
GB2256754A 1954-08-04 1954-08-04 Improvements in or relating to high frequency transmitting systems Expired GB785544A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2256754A GB785544A (en) 1954-08-04 1954-08-04 Improvements in or relating to high frequency transmitting systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2256754A GB785544A (en) 1954-08-04 1954-08-04 Improvements in or relating to high frequency transmitting systems

Publications (1)

Publication Number Publication Date
GB785544A true GB785544A (en) 1957-10-30

Family

ID=10181510

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2256754A Expired GB785544A (en) 1954-08-04 1954-08-04 Improvements in or relating to high frequency transmitting systems

Country Status (1)

Country Link
GB (1) GB785544A (en)

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