JPS5715540A - Comparator of antenna reception level - Google Patents

Comparator of antenna reception level

Info

Publication number
JPS5715540A
JPS5715540A JP9034880A JP9034880A JPS5715540A JP S5715540 A JPS5715540 A JP S5715540A JP 9034880 A JP9034880 A JP 9034880A JP 9034880 A JP9034880 A JP 9034880A JP S5715540 A JPS5715540 A JP S5715540A
Authority
JP
Japan
Prior art keywords
level
signals
circuit
signal
horizontal synchronizing
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.)
Pending
Application number
JP9034880A
Other languages
Japanese (ja)
Inventor
Michiro Ikenishi
Yumio Kawai
Hideo Iwata
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP9034880A priority Critical patent/JPS5715540A/en
Publication of JPS5715540A publication Critical patent/JPS5715540A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
    • H04B7/0808—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching comparing all antennas before reception

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To compare the level of a plurality of antennas in a short time with a simple circuit, by sampling the reception level with a little longer time than the period of a horizontal synchronizing signal per one antenna, for the signl received on a plurality of antennas. CONSTITUTION:TV high-frequency signals 1-3 received on each antenna are sequentially switched with longer than the horizontal synchronizing signal with drive signals 5-7 at a high-frequency switch 4 and become a video signal 10 at a TV receiver 9. In a switch circuit 11, the horizontal synchronizing signal is picked up at a horizontal synchronizing pulse 29, the peak value is stored with a peak hold circuit 13, and each antenna level is sampled with a switch circuit 18. Sampling level signals 20-22 are converted into a DC voltage signal at a peak hold circuit 23 and compared at a level comparison circuit 27. Only the signals with higher level become on-signals and others become off-signals, and they are synthesized with a level sampling signal at a control circuit 19 to obtain a driving signal.
JP9034880A 1980-07-01 1980-07-01 Comparator of antenna reception level Pending JPS5715540A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9034880A JPS5715540A (en) 1980-07-01 1980-07-01 Comparator of antenna reception level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9034880A JPS5715540A (en) 1980-07-01 1980-07-01 Comparator of antenna reception level

Publications (1)

Publication Number Publication Date
JPS5715540A true JPS5715540A (en) 1982-01-26

Family

ID=13996018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9034880A Pending JPS5715540A (en) 1980-07-01 1980-07-01 Comparator of antenna reception level

Country Status (1)

Country Link
JP (1) JPS5715540A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58201633A (en) * 1982-05-19 1983-11-24 大東セロフアン株式会社 Manufacture of bag with gore
JPS5974065A (en) * 1982-10-15 1984-04-26 出光石油化学株式会社 Square bottom bag and manufacture of said bag
FR2605822A1 (en) * 1986-10-22 1988-04-29 Beugin Marc Method of selecting television signals, especially within a two-channel redundant link, and device for implementing this method.
US4885625A (en) * 1986-02-06 1989-12-05 Northern Telecom Limited Integrated circuit chip manufacture

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58201633A (en) * 1982-05-19 1983-11-24 大東セロフアン株式会社 Manufacture of bag with gore
JPS5974065A (en) * 1982-10-15 1984-04-26 出光石油化学株式会社 Square bottom bag and manufacture of said bag
US4885625A (en) * 1986-02-06 1989-12-05 Northern Telecom Limited Integrated circuit chip manufacture
FR2605822A1 (en) * 1986-10-22 1988-04-29 Beugin Marc Method of selecting television signals, especially within a two-channel redundant link, and device for implementing this method.

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