BE788949A - Procede d'essai de modulateur-demodulateur - Google Patents
Procede d'essai de modulateur-demodulateurInfo
- Publication number
- BE788949A BE788949A BE788949DA BE788949A BE 788949 A BE788949 A BE 788949A BE 788949D A BE788949D A BE 788949DA BE 788949 A BE788949 A BE 788949A
- Authority
- BE
- Belgium
- Prior art keywords
- modulator
- test process
- demodulator
- demodulator test
- test
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/24—Testing correct operation
- H04L1/242—Testing correct operation by comparing a transmitted test signal with a locally generated replica
- H04L1/243—Testing correct operation by comparing a transmitted test signal with a locally generated replica at the transmitter, using a loop-back
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/24—Testing correct operation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
- Bidirectional Digital Transmission (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Communication Control (AREA)
- Mechanical Operated Clutches (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US19427071A | 1971-11-01 | 1971-11-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE788949A true BE788949A (fr) | 1973-03-19 |
Family
ID=22716941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE788949D BE788949A (fr) | 1971-11-01 | Procede d'essai de modulateur-demodulateur |
Country Status (8)
Country | Link |
---|---|
US (1) | US3769454A (fr) |
JP (1) | JPS5644621B2 (fr) |
BE (1) | BE788949A (fr) |
CA (1) | CA964593A (fr) |
DE (1) | DE2248234C2 (fr) |
FR (1) | FR2159877A1 (fr) |
GB (2) | GB1401669A (fr) |
IT (1) | IT975316B (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3952163A (en) * | 1972-04-24 | 1976-04-20 | General Datacomm Industries, Inc. | Method and apparatus for testing in FDM system |
US4039751A (en) * | 1972-04-24 | 1977-08-02 | General Datacomm Industries, Inc. | Method and apparatus for closed loop testing of first and second modulators and demodulators |
US3937882A (en) * | 1974-04-11 | 1976-02-10 | Vadic Corporation | Full-duplex communication system on a two wire line |
US3908086A (en) * | 1974-06-03 | 1975-09-23 | Redactron Corp | Method for establishing a data communication connection between two full duplex modems |
DE2522725C3 (de) * | 1975-05-22 | 1979-02-22 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Verfahren zur Fehlererkennung in einem Fahrzeugortungssystem |
GB1540900A (en) * | 1975-06-30 | 1979-02-21 | Ericsson L M Pty Ltd | Digital testing and power control in a digital communication system |
US4095045A (en) * | 1977-01-19 | 1978-06-13 | General Datacomm Industries, Inc. | Method and apparatus for signaling in a communication system |
US4383312A (en) * | 1980-11-28 | 1983-05-10 | The United States Of America As Represented By The Secretary Of The Navy | Multiplex system tester |
US4471489A (en) * | 1981-03-19 | 1984-09-11 | General Datacomm Industries, Inc. | Automatic answer/originate mode selection in modem |
KR100467587B1 (ko) * | 2002-06-07 | 2005-01-24 | 삼성전자주식회사 | 팩시 밀리의 자기 진단 방법 및 이 방법을 수행하는팩시밀리 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3571530A (en) * | 1965-05-27 | 1971-03-16 | Bell Telephone Labor Inc | System for remote testing of telephone subscribers{3 {0 lines |
US3622877A (en) * | 1969-11-07 | 1971-11-23 | Sanders Associates Inc | Apparatus for testing modulator demodulator units for transmission errors and indicating the errors per power of 10 |
US3655915A (en) * | 1970-05-07 | 1972-04-11 | Gen Datacomm Ind Inc | Closed loop test method and apparatus for duplex data transmission modem |
-
0
- BE BE788949D patent/BE788949A/fr unknown
-
1971
- 1971-11-01 US US00194270A patent/US3769454A/en not_active Expired - Lifetime
-
1972
- 1972-06-21 CA CA145,291A patent/CA964593A/en not_active Expired
- 1972-06-26 GB GB2981072A patent/GB1401669A/en not_active Expired
- 1972-06-26 GB GB84575A patent/GB1401670A/en not_active Expired
- 1972-09-18 FR FR7233035A patent/FR2159877A1/fr not_active Withdrawn
- 1972-10-02 DE DE2248234A patent/DE2248234C2/de not_active Expired
- 1972-10-20 IT IT70309/72A patent/IT975316B/it active
- 1972-10-20 JP JP10458172A patent/JPS5644621B2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3769454A (en) | 1973-10-30 |
DE2248234C2 (de) | 1982-12-16 |
JPS5644621B2 (fr) | 1981-10-21 |
IT975316B (it) | 1974-07-20 |
DE2248234A1 (de) | 1973-05-10 |
JPS4853613A (fr) | 1973-07-27 |
CA964593A (en) | 1975-03-18 |
FR2159877A1 (fr) | 1973-06-22 |
GB1401670A (en) | 1975-07-16 |
GB1401669A (en) | 1975-07-16 |
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