JPS5511627A - Test circuit for remote monitor control unit - Google Patents

Test circuit for remote monitor control unit

Info

Publication number
JPS5511627A
JPS5511627A JP8399178A JP8399178A JPS5511627A JP S5511627 A JPS5511627 A JP S5511627A JP 8399178 A JP8399178 A JP 8399178A JP 8399178 A JP8399178 A JP 8399178A JP S5511627 A JPS5511627 A JP S5511627A
Authority
JP
Japan
Prior art keywords
circuit
serial
test
parallel
signal
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
JP8399178A
Other languages
Japanese (ja)
Inventor
Hiroshi Shimizu
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8399178A priority Critical patent/JPS5511627A/en
Publication of JPS5511627A publication Critical patent/JPS5511627A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H04L1/242—Testing correct operation by comparing a transmitted test signal with a locally generated replica
    • H04L1/243—Testing correct operation by comparing a transmitted test signal with a locally generated replica at the transmitter, using a loop-back

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To obtain a test circuit which can confirm the operation with its own unit only and without including the transmission line by installing the test switching circuit for the remote monitor control unit and thus supplying the output signal of the parallel-serial converter circuit into the serial-parallel converter circuit. CONSTITUTION:The input signal taken into input circuit 1 is converted into the serial signal through parallel-serial converter circuit 2 by closing test switching circuit 10 to the a-side. Then the serial signal is converted into the parallel signal through transmission line 7 and serial-parallel converter circuit 3 and then delivered for display to the lamp display line or the like from output circuit 4. For test execution, line 7 is isolated by switching circuit 10 to the b-side, and the serial signal delivered from circuit 2 is supplied to circuit 3 of the self-station to make its own lamp glow through circuit 4. In such way, the test is possible through isolation of line 7, thus enhancing the reliability for the test itself.
JP8399178A 1978-07-12 1978-07-12 Test circuit for remote monitor control unit Pending JPS5511627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8399178A JPS5511627A (en) 1978-07-12 1978-07-12 Test circuit for remote monitor control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8399178A JPS5511627A (en) 1978-07-12 1978-07-12 Test circuit for remote monitor control unit

Publications (1)

Publication Number Publication Date
JPS5511627A true JPS5511627A (en) 1980-01-26

Family

ID=13817996

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8399178A Pending JPS5511627A (en) 1978-07-12 1978-07-12 Test circuit for remote monitor control unit

Country Status (1)

Country Link
JP (1) JPS5511627A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4721690A (en) * 1984-02-08 1988-01-26 Ludwig Ross High PbO-content glasses in the system SiO2 --PbO--M2 O with increased chemical stability

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4721690A (en) * 1984-02-08 1988-01-26 Ludwig Ross High PbO-content glasses in the system SiO2 --PbO--M2 O with increased chemical stability

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