JPS57133733A - Measuring device for digital transmission characteristics - Google Patents

Measuring device for digital transmission characteristics

Info

Publication number
JPS57133733A
JPS57133733A JP56019428A JP1942881A JPS57133733A JP S57133733 A JPS57133733 A JP S57133733A JP 56019428 A JP56019428 A JP 56019428A JP 1942881 A JP1942881 A JP 1942881A JP S57133733 A JPS57133733 A JP S57133733A
Authority
JP
Japan
Prior art keywords
signal
pcm
filter
circuit
digital
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
JP56019428A
Other languages
Japanese (ja)
Other versions
JPH0124381B2 (en
Inventor
Nobuo Furuya
Shoichi Zensai
Fumihiko Deguchi
Takashi Yamamoto
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.)
Anritsu Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Anritsu Corp
Nippon Telegraph and Telephone Corp
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 Anritsu Corp, Nippon Telegraph and Telephone Corp filed Critical Anritsu Corp
Priority to JP56019428A priority Critical patent/JPS57133733A/en
Publication of JPS57133733A publication Critical patent/JPS57133733A/en
Publication of JPH0124381B2 publication Critical patent/JPH0124381B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To achieve a transmission characteristic measuring device with high stability, accuracy and small size, without requiring troublesome adjustment, by adopting a digital signal processing system. CONSTITUTION:In level measuring of a PCM signal, a channel filter coefficient is given from a coefficient storage circuit 23 to a digital filter 22 and a switch 29 is set to m. A PCM signal is applied to an input terminal Y, and when this signal is received at a code conversion circuit 21, a PCM nonlinear code is converted into a digital signal of a linear code. This signal is applied to the filter 22 and processed for channel filter, and inputted to an accumulator 25 after being squared at a square circuit 24. A digital signal representing the power of PCM signal is outputted at each time from the accumulator 25, and decibel value is displayed on a display circuit 27. The measurement of talking noise on the PCM lines can be made.
JP56019428A 1981-02-12 1981-02-12 Measuring device for digital transmission characteristics Granted JPS57133733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56019428A JPS57133733A (en) 1981-02-12 1981-02-12 Measuring device for digital transmission characteristics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56019428A JPS57133733A (en) 1981-02-12 1981-02-12 Measuring device for digital transmission characteristics

Publications (2)

Publication Number Publication Date
JPS57133733A true JPS57133733A (en) 1982-08-18
JPH0124381B2 JPH0124381B2 (en) 1989-05-11

Family

ID=11998999

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56019428A Granted JPS57133733A (en) 1981-02-12 1981-02-12 Measuring device for digital transmission characteristics

Country Status (1)

Country Link
JP (1) JPS57133733A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006230A1 (en) * 1985-04-13 1986-10-23 Anritsu Corporation Apparatus for analysing two-channel transmission/reflection characteristics
WO2006044638A3 (en) * 2004-10-14 2008-02-14 Tenneco Automotive Operating Amplitude controlled orifice valving

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51129112A (en) * 1975-05-02 1976-11-10 Anritsu Corp Transmission quality measuring device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51129112A (en) * 1975-05-02 1976-11-10 Anritsu Corp Transmission quality measuring device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006230A1 (en) * 1985-04-13 1986-10-23 Anritsu Corporation Apparatus for analysing two-channel transmission/reflection characteristics
US4812738A (en) * 1985-04-13 1989-03-14 Anritsu Corporation Apparatus for analyzing transmission/reflection characteristics
WO2006044638A3 (en) * 2004-10-14 2008-02-14 Tenneco Automotive Operating Amplitude controlled orifice valving
GB2433303B (en) * 2004-10-14 2009-08-26 Tenneco Automotive Operating Amplitude controlled orifice valving

Also Published As

Publication number Publication date
JPH0124381B2 (en) 1989-05-11

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