JPS55619A - Transmission monitor system - Google Patents

Transmission monitor system

Info

Publication number
JPS55619A
JPS55619A JP7206978A JP7206978A JPS55619A JP S55619 A JPS55619 A JP S55619A JP 7206978 A JP7206978 A JP 7206978A JP 7206978 A JP7206978 A JP 7206978A JP S55619 A JPS55619 A JP S55619A
Authority
JP
Japan
Prior art keywords
transmission
amplifier
output
circuit
monitor
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
JP7206978A
Other languages
Japanese (ja)
Inventor
Kazuo Saito
Nagao Sasahara
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP7206978A priority Critical patent/JPS55619A/en
Publication of JPS55619A publication Critical patent/JPS55619A/en
Pending legal-status Critical Current

Links

Landscapes

  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE: To avoid the non-operation due to the lowering of the transmission output level in the transmission monitor system of the power line protecting carrier terminal equipment by adding both the multiplier and the integrator to the transmission monitor circuit and then carrying out the monitor for the input/output signals of the transmission amplifier.
CONSTITUTION: The output signal of transmission circuit 1 is sent to hybrid transformer 5 via transmission amplifier 2 and then transmitted to the line via line filter 6 and insulating transformer 7. Here the transmission monitor is carried out via the signals which are sent through integrator 9 and multiplier 8 supplying the output of circuit 1 and amplifier 2 plus the reception output of transformer 5 in the form of the input. At the same time, the fault of amplifier 2 is decided through 2nd transmission monitor circuit 10.
COPYRIGHT: (C)1980,JPO&Japio
JP7206978A 1978-06-16 1978-06-16 Transmission monitor system Pending JPS55619A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7206978A JPS55619A (en) 1978-06-16 1978-06-16 Transmission monitor system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7206978A JPS55619A (en) 1978-06-16 1978-06-16 Transmission monitor system

Publications (1)

Publication Number Publication Date
JPS55619A true JPS55619A (en) 1980-01-07

Family

ID=13478735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7206978A Pending JPS55619A (en) 1978-06-16 1978-06-16 Transmission monitor system

Country Status (1)

Country Link
JP (1) JPS55619A (en)

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