JPS52117016A - Remote observation - Google Patents

Remote observation

Info

Publication number
JPS52117016A
JPS52117016A JP3462376A JP3462376A JPS52117016A JP S52117016 A JPS52117016 A JP S52117016A JP 3462376 A JP3462376 A JP 3462376A JP 3462376 A JP3462376 A JP 3462376A JP S52117016 A JPS52117016 A JP S52117016A
Authority
JP
Japan
Prior art keywords
remote observation
wireless
modulate
notice
trouble
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
JP3462376A
Other languages
Japanese (ja)
Inventor
Noriaki Kanda
Soichi Akao
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3462376A priority Critical patent/JPS52117016A/en
Publication of JPS52117016A publication Critical patent/JPS52117016A/en
Pending legal-status Critical Current

Links

Landscapes

  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE: To notice the trouble in simple constitution by providing the failure signal modulation part to modulate the wireless frequency carrier directly with the tone frequency etc. corresponding to the failure state in the wireless relay unit side and detecting it with using the band pass filter in receiving side.
COPYRIGHT: (C)1977,JPO&Japio
JP3462376A 1976-03-29 1976-03-29 Remote observation Pending JPS52117016A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3462376A JPS52117016A (en) 1976-03-29 1976-03-29 Remote observation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3462376A JPS52117016A (en) 1976-03-29 1976-03-29 Remote observation

Publications (1)

Publication Number Publication Date
JPS52117016A true JPS52117016A (en) 1977-10-01

Family

ID=12419505

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3462376A Pending JPS52117016A (en) 1976-03-29 1976-03-29 Remote observation

Country Status (1)

Country Link
JP (1) JPS52117016A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63238746A (en) * 1987-03-26 1988-10-04 Nec Corp Trouble supervising system for transmission line signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63238746A (en) * 1987-03-26 1988-10-04 Nec Corp Trouble supervising system for transmission line signal

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