NO830825L - PROCEDURE AND DEVICE FOR MONITORING A PCM CODE / DECODER DEVICE - Google Patents

PROCEDURE AND DEVICE FOR MONITORING A PCM CODE / DECODER DEVICE

Info

Publication number
NO830825L
NO830825L NO830825A NO830825A NO830825L NO 830825 L NO830825 L NO 830825L NO 830825 A NO830825 A NO 830825A NO 830825 A NO830825 A NO 830825A NO 830825 L NO830825 L NO 830825L
Authority
NO
Norway
Prior art keywords
test signal
analogue
digital
converter
sample
Prior art date
Application number
NO830825A
Other languages
Norwegian (no)
Other versions
NO158360B (en
NO158360C (en
Inventor
Heinz Richter
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of NO830825L publication Critical patent/NO830825L/en
Publication of NO158360B publication Critical patent/NO158360B/en
Publication of NO158360C publication Critical patent/NO158360C/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/14—Monitoring arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Dc Digital Transmission (AREA)
  • Analogue/Digital Conversion (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

1. A method of monitoring a PCM-coder/decoder device comprising an analogue-/digital converter (3) and a multiplex device (6) which precedes said converter (3) at the transmitting end and comprising a digital-/analogue converter (2) and a demultiplex device (5) which follows said converter (2) at the receiving end, wherein a digital test signal (DT) is inserted into a time slot of the PCM received signal which is not used for the transmission of telephone signals, where said digital test signal (DT), following digital-/analogue conversion, is fed as an analogue test signal (AT), via a sample- and hold circuit (4) and via the multiplex device (6), to the analogue-/digital converter (3) and, as reconverted digital test signal (DT'), is subjected to comparison with the transmitted digital test signal (DT), characterised in that the same analogue test signal (AT) is sampled several times in succession by the sample- and hold circuit (4), that during a following multiplex frame no sampling is carried out by the sample-and hold circuit (4), and that the analysis of the reconverted digital test signal (DT') at the output of the analogue-/digital converter (3) is carried out after a safety time period (T0 ) following the last sampling procedure of the same analogue test signal (AT) during the time duration (T1 ) of a multiplex frame.
NO830825A 1982-03-17 1983-03-09 PROCEDURE AND DEVICE FOR MONITORING A PCM CODE / DECODER DEVICE. NO158360C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823209724 DE3209724A1 (en) 1982-03-17 1982-03-17 METHOD AND DEVICE FOR MONITORING A PCM CODING / DECODING DEVICE

Publications (3)

Publication Number Publication Date
NO830825L true NO830825L (en) 1983-09-19
NO158360B NO158360B (en) 1988-05-16
NO158360C NO158360C (en) 1988-08-24

Family

ID=6158509

Family Applications (1)

Application Number Title Priority Date Filing Date
NO830825A NO158360C (en) 1982-03-17 1983-03-09 PROCEDURE AND DEVICE FOR MONITORING A PCM CODE / DECODER DEVICE.

Country Status (7)

Country Link
EP (1) EP0089063B1 (en)
AT (1) ATE25312T1 (en)
AU (1) AU538868B2 (en)
BR (1) BR8301290A (en)
DE (2) DE3209724A1 (en)
GR (1) GR77157B (en)
NO (1) NO158360C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825448A (en) * 1986-08-07 1989-04-25 International Mobile Machines Corporation Subscriber unit for wireless digital telephone system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2240218B2 (en) * 1972-08-16 1977-05-18 TEKA DE Feiten & Guilleaume Fernmeldeanlagen GmbH, 500 Nürnberg MONITORING DEVICE FOR A PULSE CODE MODULATION SYSTEM
FR2252711A1 (en) * 1973-11-27 1975-06-20 Cit Alcatel Surveillance of multiplexed pulse code telephonic signals - is enabled by test word loop between coder and decoder
FR2341996A1 (en) * 1976-02-19 1977-09-16 Caurant Hubert Transmission quantity measurement of system input - using signal lines, generator and level meter for transmission of analogue signals via digital channels
US4266292A (en) * 1978-11-20 1981-05-05 Wescom Switching, Inc. Method and apparatus for testing analog-to-digital and digital-to-analog code converters

Also Published As

Publication number Publication date
BR8301290A (en) 1983-11-22
NO158360B (en) 1988-05-16
EP0089063B1 (en) 1987-01-28
DE3369619D1 (en) 1987-03-05
AU1250783A (en) 1983-09-22
AU538868B2 (en) 1984-08-30
GR77157B (en) 1984-09-07
DE3209724A1 (en) 1983-09-29
EP0089063A3 (en) 1984-12-05
EP0089063A2 (en) 1983-09-21
NO158360C (en) 1988-08-24
ATE25312T1 (en) 1987-02-15

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