GB1318824A – Error-measurement systems
– Google Patents
GB1318824A – Error-measurement systems
– Google Patents
Error-measurement systems
Info
Publication number
GB1318824A
GB1318824A
GB1178071*[A
GB1178071A
GB1318824A
GB 1318824 A
GB1318824 A
GB 1318824A
GB 1178071 A
GB1178071 A
GB 1178071A
GB 1318824 A
GB1318824 A
GB 1318824A
Authority
GB
United Kingdom
Prior art keywords
gate
test pattern
block
bit
register
Prior art date
1970-04-29
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
GB1178071*[A
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.)
1970-04-29
Filing date
1971-04-28
Publication date
1973-05-31
1970-04-29
Priority claimed from DE19702021098
external-priority
patent/DE2021098C2/en
1971-04-28
Application filed by Siemens AG
filed
Critical
Siemens AG
1973-05-31
Publication of GB1318824A
publication
Critical
patent/GB1318824A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L43/00—Arrangements for monitoring or testing data switching networks
H04L43/50—Testing arrangements
Abstract
1318824 Data transmission system testing SIEMENS AG 28 April 1971 [29 April 1970] 11780/71 Heading H4P In a testing of a data transmission system where a test pattern of predetermined length is transmitted and compared at the receiver bitby-bit with an identical locally generated test pattern and the total number of errors counted or alternatively the number of bit-blocks containing at least one error counted, the receiver can vary the bit-length of the block on which an assessment is based. In the receiver of Fig. 2 a test pattern received at E is compared bit-by-bit in a comparator V with an identical pattern generated by shiftregister SR having mod-2 addition feedback A1. The two patterns are initially synchronized before measurements are taken by setting the register to a point 20 bit positions before the end of the pattern and then comparing the register output with the received pattern. Any lack of coincidence found by comparator V causes the register to be reset via gate G2 to the 20 bit point. The register on attaining the end of the pattern is deemed to be synchronized and a gate G3 detects the all-zero condition of the register to reset bi-stable K1 via gate G4, so removing the inhibition from gate G1 Any subsequent error pulses from comparator V pass through gates G1, G5 to error counter F2. To measure block-errors, each error signal from the comparator via a now closed switch (not shown) sets bi-stable K2 to close gate G5 so blocking pulses to counter FZ. K2 is only reset at the end of each block by counter Z, so that only one error pulse per block reaches counter FZ. Counter Z is set to the derived block length and is driven by clock pulses T (S1 down) if the block length is less than the test pattern length or by pulses from gate G3 at the end of each test pattern (S1 up) if the block length is greater than the test pattern length. To terminate either measurement switch S2 is put to position 1 and at the end of the next test cycle, for total errors, or at the next coincidence of the end of a test pattern and block length, for block errors, switching unit D operates to set bi-stable K1 via gate G6, so inhibiting gate G1 to further error pulses. The circuit of Fig. 2 may act as a transmitter of the test pattern by putting switch S3 to position 1 and feeding the output of register SR via gate G7 to output A.
GB1178071*[A
1970-04-29
1971-04-28
Error-measurement systems
Expired
GB1318824A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DE19702021098
DE2021098C2
(en)
1970-04-29
Method for measuring the frequency of bit and block errors with selectable block length when transmitting binary-coded data characters
Publications (1)
Publication Number
Publication Date
GB1318824A
true
GB1318824A
(en)
1973-05-31
Family
ID=5769839
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1178071*[A
Expired
GB1318824A
(en)
1970-04-29
1971-04-28
Error-measurement systems
Country Status (11)
Country
Link
US
(1)
US3725860A
(en)
JP
(1)
JPS5520414B1
(en)
AT
(1)
AT315252B
(en)
BE
(1)
BE766456A
(en)
CH
(1)
CH531282A
(en)
DK
(1)
DK141390C
(en)
FR
(1)
FR2090947A5
(en)
GB
(1)
GB1318824A
(en)
LU
(1)
LU63062A1
(en)
NL
(1)
NL7105915A
(en)
SE
(1)
SE367297B
(en)
Families Citing this family (12)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3914740A
(en)
*
1973-09-04
1975-10-21
Northern Electric Co
Error detector for pseudo-random sequence of digits
US3916379A
(en)
*
1974-04-08
1975-10-28
Honeywell Inf Systems
Error-rate monitoring unit in a communication system
US3934224A
(en)
*
1974-10-29
1976-01-20
Honeywell Information Systems, Inc.
Apparatus for continuous assessment of data transmission accuracy in a communication system
GB1548001A
(en)
*
1975-04-11
1979-07-04
Marconi Co Ltd
Error measurement for digital systems
US4080589A
(en)
*
1975-06-02
1978-03-21
Gte Automatic Electric Laboratories Incorporated
Error density detector
US4234953A
(en)
*
1978-12-07
1980-11-18
Gte Automatic Electric Laboratories Incorporated
Error density detector
JPH0618358B2
(en)
*
1985-04-09
1994-03-09
沖電気工業株式会社
Error control coding system
US4745603A
(en)
*
1986-05-27
1988-05-17
American Telephone And Telegraph Company, At&T Bell Laboratories
Code sequence generator for a digital transmission line fault location system
US4920537A
(en)
*
1988-07-05
1990-04-24
Darling Andrew S
Method and apparatus for non-intrusive bit error rate testing
DE3933262A1
(en)
*
1989-10-05
1991-04-11
Bosch Gmbh Robert
METHOD AND DEVICE FOR BIDIRECTIONAL TRANSMISSION OF DATA
US5197062A
(en)
*
1991-09-04
1993-03-23
Picklesimer David D
Method and system for simultaneous analysis of multiplexed channels
JPH07225263A
(en)
*
1994-02-09
1995-08-22
Advantest Corp
Bit-error measuring instrument
Family Cites Families (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3069498A
(en)
*
1961-01-31
1962-12-18
Richard J Frank
Measuring circuit for digital transmission system
US3496536A
(en)
*
1966-05-02
1970-02-17
Xerox Corp
Data link test apparatus
US3491338A
(en)
*
1967-04-17
1970-01-20
Us Air Force
System for synchronizing a receiver and transmitter at opposite ends of a transmission path and for evaluating the noise level thereof
US3562710A
(en)
*
1968-04-24
1971-02-09
Ball Brothers Res Corp
Bit error detector for digital communication system
US3596245A
(en)
*
1969-05-21
1971-07-27
Hewlett Packard Ltd
Data link test method and apparatus
1971
1971-03-02
CH
CH304371A
patent/CH531282A/en
not_active
IP Right Cessation
1971-03-15
AT
AT223171A
patent/AT315252B/en
not_active
IP Right Cessation
1971-04-20
US
US00135645A
patent/US3725860A/en
not_active
Expired – Lifetime
1971-04-27
LU
LU63062D
patent/LU63062A1/xx
unknown
1971-04-28
SE
SE05493/71A
patent/SE367297B/xx
unknown
1971-04-28
GB
GB1178071*[A
patent/GB1318824A/en
not_active
Expired
1971-04-28
DK
DK204771A
patent/DK141390C/en
active
1971-04-29
BE
BE766456A
patent/BE766456A/en
unknown
1971-04-29
FR
FR7115389A
patent/FR2090947A5/fr
not_active
Expired
1971-04-29
NL
NL7105915A
patent/NL7105915A/xx
unknown
1971-04-30
JP
JP2883471A
patent/JPS5520414B1/ja
active
Pending
Also Published As
Publication number
Publication date
LU63062A1
(en)
1972-03-02
NL7105915A
(en)
1971-11-02
FR2090947A5
(en)
1972-01-14
CH531282A
(en)
1972-11-30
BE766456A
(en)
1971-10-29
AT315252B
(en)
1974-05-27
SE367297B
(en)
1974-05-20
US3725860A
(en)
1973-04-03
DE2021098B1
(en)
1971-11-04
DK141390C
(en)
1980-09-01
JPS5520414B1
(en)
1980-06-02
DK141390B
(en)
1980-03-03
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Legal Events
Date
Code
Title
Description
1973-10-10
PS
Patent sealed [section 19, patents act 1949]
1983-12-14
PCNP
Patent ceased through non-payment of renewal fee
