GB1490713A - Pulse code modulation data transmission systems - Google Patents

Pulse code modulation data transmission systems

Info

Publication number
GB1490713A
GB1490713A GB44364/74A GB4436474A GB1490713A GB 1490713 A GB1490713 A GB 1490713A GB 44364/74 A GB44364/74 A GB 44364/74A GB 4436474 A GB4436474 A GB 4436474A GB 1490713 A GB1490713 A GB 1490713A
Authority
GB
United Kingdom
Prior art keywords
switch
data transmission
regenerators
transmission systems
pulse code
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.)
Expired
Application number
GB44364/74A
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.)
Siemens AG
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 GB1490713A publication Critical patent/GB1490713A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems
    • H04B17/401—Monitoring; Testing of relay systems with selective localization
    • H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
    • H04B17/404—Monitoring; Testing of relay systems with selective localization using different frequencies selected by local filters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

1490713 Testing pulse regenerators SIEMENS AG 14 Oct 1974 [22 Nov 1973] 44364/74 Heading H4R In a P.C.M. communication system with means for testing pulse regenerators in intermediate stations, as disclosed in Specifications 1,212,907 and 1,212,908, the switch 12 which is actuated when the testing procedure is initiated comprises a first switch amplifier device 31 with a frequency dependent feedback network 44 and a second switch device 30 constituted by a two-stage transistor switch. The regenerators in one of the transmission paths are also provided with respective active pre-adjusted fixed value signal distortion correctors comprising a transistor amplifier stage with a frequency dependent negative feedback path (33), Fig. 5 (not shown).
GB44364/74A 1973-11-22 1974-10-14 Pulse code modulation data transmission systems Expired GB1490713A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2358272A DE2358272C2 (en) 1973-11-22 1973-11-22 Device for determining errors in a message transmission system for pulse code modulation

Publications (1)

Publication Number Publication Date
GB1490713A true GB1490713A (en) 1977-11-02

Family

ID=5898801

Family Applications (1)

Application Number Title Priority Date Filing Date
GB44364/74A Expired GB1490713A (en) 1973-11-22 1974-10-14 Pulse code modulation data transmission systems

Country Status (10)

Country Link
JP (1) JPS5411209B2 (en)
AT (1) AT341586B (en)
BE (1) BE822452A (en)
DE (1) DE2358272C2 (en)
FR (1) FR2252708B1 (en)
GB (1) GB1490713A (en)
IT (1) IT1025852B (en)
NL (1) NL165625C (en)
SE (1) SE393237B (en)
YU (1) YU36567B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2856679C3 (en) * 1978-12-29 1982-02-11 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for determining and locating errors in a transmission system for pulse code modulated signals
DE3003516A1 (en) * 1980-01-31 1981-08-06 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR FORMING A LOOP IN AN INTERMEDIATE REGENERATOR OF A PCM SYSTEM

Also Published As

Publication number Publication date
JPS5085210A (en) 1975-07-09
FR2252708B1 (en) 1978-11-24
AU7553774A (en) 1976-05-20
YU36567B (en) 1984-02-29
SE393237B (en) 1977-05-02
DE2358272B1 (en) 1975-04-17
ATA929474A (en) 1977-06-15
IT1025852B (en) 1978-08-30
YU312074A (en) 1982-02-25
NL165625C (en) 1981-04-15
NL165625B (en) 1980-11-17
BE822452A (en) 1975-03-14
SE7414645L (en) 1975-05-23
DE2358272C2 (en) 1975-12-11
NL7415246A (en) 1975-05-26
JPS5411209B2 (en) 1979-05-12
FR2252708A1 (en) 1975-06-20
AT341586B (en) 1978-02-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee