FR2376563A1 - Procede et schema des circuits assurant la production d'un signal numerique destine au controle de l'element terminal d'un systeme de transmission pcm - Google Patents
Procede et schema des circuits assurant la production d'un signal numerique destine au controle de l'element terminal d'un systeme de transmission pcmInfo
- Publication number
- FR2376563A1 FR2376563A1 FR7739240A FR7739240A FR2376563A1 FR 2376563 A1 FR2376563 A1 FR 2376563A1 FR 7739240 A FR7739240 A FR 7739240A FR 7739240 A FR7739240 A FR 7739240A FR 2376563 A1 FR2376563 A1 FR 2376563A1
- Authority
- FR
- France
- Prior art keywords
- transmission system
- control
- production
- diagram
- digital 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.)
- Pending
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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/02—Digital function generators
- G06F1/03—Digital function generators working, at least partly, by table look-up
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/02—Digital function generators
- G06F1/03—Digital function generators working, at least partly, by table look-up
- G06F1/0321—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/10—Calibration or testing
- H03M1/1009—Calibration
- H03M1/1014—Calibration at one point of the transfer characteristic, i.e. by adjusting a single reference value, e.g. bias or gain error
- H03M1/1019—Calibration at one point of the transfer characteristic, i.e. by adjusting a single reference value, e.g. bias or gain error by storing a corrected or correction value in a digital look-up table
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/50—Conversion to or from non-linear codes, e.g. companding
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2101/00—Indexing scheme relating to the type of digital function generated
- G06F2101/16—PCM companding functions
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/04—Analogue/digital conversion; Digital/analogue conversion using stochastic techniques
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/10—Calibration or testing
- H03M1/1071—Measuring or testing
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Analogue/Digital Conversion (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
L'invention permet de réduire l'encombrement de la mémoire à un seul niveau par type de signal sinusoïdal. Les mémoires de valeurs fixes 1 et 8 alimentées par les logarithmes de tensions aux fréquences f et fc sont reliées par le commutateur 9 au circuit additionneur 3 qui reçoit le mot codé de niveau 12 et dont la sortie est reliée au convertisseur de code 5 qui fournit la transformation en code A. Ce circuit permet de contrôler ou de régler l'élément final (décodeur et démultiplexeur) d'un système de transmission.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2659512A DE2659512B1 (de) | 1976-12-30 | 1976-12-30 | Verfahren und Schaltungsanordnung zum Erzeugen eines Digitalsignals zum Pruefen einer PCM-Endstelle |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2376563A1 true FR2376563A1 (fr) | 1978-07-28 |
Family
ID=5997009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7739240A Pending FR2376563A1 (fr) | 1976-12-30 | 1977-12-20 | Procede et schema des circuits assurant la production d'un signal numerique destine au controle de l'element terminal d'un systeme de transmission pcm |
Country Status (3)
Country | Link |
---|---|
US (1) | US4161627A (fr) |
DE (1) | DE2659512B1 (fr) |
FR (1) | FR2376563A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4386411A (en) * | 1980-01-08 | 1983-05-31 | National Research Development Corporation | Random pattern generator |
DE3020463C2 (de) * | 1980-05-29 | 1989-08-10 | Siemens AG, 1000 Berlin und 8000 München | Setzbarer Pseudozufallsgenerator |
DE3332305A1 (de) * | 1983-09-07 | 1985-04-04 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur steuerbaren daempfung von digitalen signalen |
EP0333942A1 (fr) * | 1988-03-22 | 1989-09-27 | Hewlett-Packard Limited | Contrôle des systèmes de communication numériques |
US5173896A (en) * | 1990-11-30 | 1992-12-22 | Bell Atlantic Network Services, Inc. | T-carrier network simulator |
US6088334A (en) * | 1997-03-13 | 2000-07-11 | U. S. Robotics Access Corp. | System and method for determining end-to-end characteristics of a data communication channel |
AU6447798A (en) * | 1997-03-07 | 1998-09-22 | 3Com Corporation | System and method for determining end-to-end characteristics of a data communication channel |
US7958267B1 (en) | 2002-11-19 | 2011-06-07 | Quadrus Corporation | Message traffic interception system |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1603175A (fr) * | 1968-07-30 | 1971-03-22 | ||
US3697892A (en) * | 1971-02-19 | 1972-10-10 | Bell Telephone Labor Inc | Digital frequency-shift modulator using a read-only-memory |
US3823376A (en) * | 1970-03-12 | 1974-07-09 | Philips Corp | Transmitter for the transmission of analogue signals by pulse code |
US3911225A (en) * | 1973-02-27 | 1975-10-07 | Cit Alcatel | Method and device for checking and adjusting a PCM transmission device |
DE2441551A1 (de) * | 1974-08-30 | 1976-03-11 | Siemens Ag | Verfahren zur einspeisung von mehrfrequenzcodezeichen in pcm-vermittlungsnetze |
FR2286552A1 (fr) * | 1974-09-30 | 1976-04-23 | Roche Bernard | Generateur numerique de signaux du code a multifrequences |
DE2320847B2 (de) * | 1973-04-25 | 1978-03-16 | Wandel & Goltermann Gmbh & Co, 7412 Eningen | Digitalsignalgenerator zum Prüfen der Empfangsseite einer PCM-Endstelle |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH545560A (fr) * | 1971-05-06 | 1974-01-31 |
-
1976
- 1976-12-30 DE DE2659512A patent/DE2659512B1/de not_active Withdrawn
-
1977
- 1977-12-20 FR FR7739240A patent/FR2376563A1/fr active Pending
- 1977-12-29 US US05/865,501 patent/US4161627A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1603175A (fr) * | 1968-07-30 | 1971-03-22 | ||
US3823376A (en) * | 1970-03-12 | 1974-07-09 | Philips Corp | Transmitter for the transmission of analogue signals by pulse code |
US3697892A (en) * | 1971-02-19 | 1972-10-10 | Bell Telephone Labor Inc | Digital frequency-shift modulator using a read-only-memory |
US3911225A (en) * | 1973-02-27 | 1975-10-07 | Cit Alcatel | Method and device for checking and adjusting a PCM transmission device |
DE2320847B2 (de) * | 1973-04-25 | 1978-03-16 | Wandel & Goltermann Gmbh & Co, 7412 Eningen | Digitalsignalgenerator zum Prüfen der Empfangsseite einer PCM-Endstelle |
DE2441551A1 (de) * | 1974-08-30 | 1976-03-11 | Siemens Ag | Verfahren zur einspeisung von mehrfrequenzcodezeichen in pcm-vermittlungsnetze |
FR2286552A1 (fr) * | 1974-09-30 | 1976-04-23 | Roche Bernard | Generateur numerique de signaux du code a multifrequences |
Non-Patent Citations (3)
Title |
---|
EXBK/62 * |
EXBK/72 * |
EXBK/75 * |
Also Published As
Publication number | Publication date |
---|---|
DE2659512B1 (de) | 1978-05-24 |
US4161627A (en) | 1979-07-17 |
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