JPS57147338A - Measurement system for transmission characteristics - Google Patents

Measurement system for transmission characteristics

Info

Publication number
JPS57147338A
JPS57147338A JP3292081A JP3292081A JPS57147338A JP S57147338 A JPS57147338 A JP S57147338A JP 3292081 A JP3292081 A JP 3292081A JP 3292081 A JP3292081 A JP 3292081A JP S57147338 A JPS57147338 A JP S57147338A
Authority
JP
Japan
Prior art keywords
frequency
sent
signal tone
terminating device
measurement 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.)
Granted
Application number
JP3292081A
Other languages
Japanese (ja)
Other versions
JPS6237576B2 (en
Inventor
Shoichi Zensai
Hiroshi Sakurada
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 JP3292081A priority Critical patent/JPS57147338A/en
Publication of JPS57147338A publication Critical patent/JPS57147338A/en
Publication of JPS6237576B2 publication Critical patent/JPS6237576B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To shorten a measurement time by regarding the frequency of a forward-path measurement signal tone sent from an originating device to a terminating device and that of a backward-path measurement signal tone sent reversely as those at which signals pass through only the filters of the opposite sides, and measuring transmission-frequency characteristics by both the devices simultaneously. CONSTITUTION:As a forward-path measurement signal tone from an originating device MM to a terminating device SM, a signal with a frequency f1 from an oscillator 11b is selected and sent through a line 1. Then, this signal is led to a measuring instrument 24 through an LPF67b in the terminating device SM. On the other hand, a backward-path measurement signal tone with a frequency fm+1 from an oscillator 21b in the terminating device SM is sent through a line 7. This signal tone is led to a measuring instrument 14 through an HPF57b in the originating device MM. In this state, both the devices MM and SM perform measurement in the same time zone, thus measuring levels at frequencies by adequately varying the frequency for transmission.
JP3292081A 1981-03-07 1981-03-07 Measurement system for transmission characteristics Granted JPS57147338A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3292081A JPS57147338A (en) 1981-03-07 1981-03-07 Measurement system for transmission characteristics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3292081A JPS57147338A (en) 1981-03-07 1981-03-07 Measurement system for transmission characteristics

Publications (2)

Publication Number Publication Date
JPS57147338A true JPS57147338A (en) 1982-09-11
JPS6237576B2 JPS6237576B2 (en) 1987-08-13

Family

ID=12372329

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3292081A Granted JPS57147338A (en) 1981-03-07 1981-03-07 Measurement system for transmission characteristics

Country Status (1)

Country Link
JP (1) JPS57147338A (en)

Also Published As

Publication number Publication date
JPS6237576B2 (en) 1987-08-13

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