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JPS55138931A - Change-over system of existing unit and reserve unit - Google Patents

Change-over system of existing unit and reserve unit

Info

Publication number
JPS55138931A
JPS55138931A JP4598179A JP4598179A JPS55138931A JP S55138931 A JPS55138931 A JP S55138931A JP 4598179 A JP4598179 A JP 4598179A JP 4598179 A JP4598179 A JP 4598179A JP S55138931 A JPS55138931 A JP S55138931A
Authority
JP
Japan
Prior art keywords
unit
change
existing
reserve
detector
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.)
Granted
Application number
JP4598179A
Other languages
Japanese (ja)
Other versions
JPS6142972B2 (en
Inventor
Hiroaki Shimayama
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4598179A priority Critical patent/JPS55138931A/en
Publication of JPS55138931A publication Critical patent/JPS55138931A/en
Publication of JPS6142972B2 publication Critical patent/JPS6142972B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To make it unnecessary to do a complicated consideration for completing two characteristics of the existing system and the reserve system, by changing for use one set of a diode detector and a logarithmic amplifier to the existing unit and the reserve unit by the chopper method. CONSTITUTION:An input signal of the carrier wave input terminal 1 is equally divided by the branch circuit 2 and is provided to both the existing unit and the reserve unit. The directional couplers 4 and 14 divide a part of the input carrier wave, and these two carrier waves are supplied to a change-over device 31 by which a chopper signal is provided to the change-over control input, and are changed mutually. An output of the change-over device 31 is provided to the phase synchronous amplitude detector 35 by which a chopper signal is provided to the control input terminal through the diode detector 33 and the logarithmic amplifier 34. An output of the detector 35 is provided to the threshold detector 37 through the low band filter 36, and the change-over device 38 of the existing unit and the reseve unit is driven by the above output.
JP4598179A 1979-04-17 1979-04-17 Change-over system of existing unit and reserve unit Granted JPS55138931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4598179A JPS55138931A (en) 1979-04-17 1979-04-17 Change-over system of existing unit and reserve unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4598179A JPS55138931A (en) 1979-04-17 1979-04-17 Change-over system of existing unit and reserve unit

Publications (2)

Publication Number Publication Date
JPS55138931A true JPS55138931A (en) 1980-10-30
JPS6142972B2 JPS6142972B2 (en) 1986-09-25

Family

ID=12734352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4598179A Granted JPS55138931A (en) 1979-04-17 1979-04-17 Change-over system of existing unit and reserve unit

Country Status (1)

Country Link
JP (1) JPS55138931A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007150990A (en) * 2005-11-30 2007-06-14 Yagi Antenna Co Ltd Video signal demodulator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6572364B1 (en) 2018-10-23 2019-09-11 祥友 新井 End pin body fixing member and fixing tool and musical instrument provided with the fixing tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007150990A (en) * 2005-11-30 2007-06-14 Yagi Antenna Co Ltd Video signal demodulator

Also Published As

Publication number Publication date
JPS6142972B2 (en) 1986-09-25

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