ES8609857A1 - Un tranmisor de television - Google Patents
Un tranmisor de televisionInfo
- Publication number
- ES8609857A1 ES8609857A1 ES547052A ES547052A ES8609857A1 ES 8609857 A1 ES8609857 A1 ES 8609857A1 ES 547052 A ES547052 A ES 547052A ES 547052 A ES547052 A ES 547052A ES 8609857 A1 ES8609857 A1 ES 8609857A1
- Authority
- ES
- Spain
- Prior art keywords
- output
- corrector
- linearity
- distortion
- control signals
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
TRANSMISOR DE FUERZA. CONSTA DE: UNA ENTRADA (1) DE SEÑAL DE VIDEO; UN MODULADOR (2) EN DONDE SE MODULA LA SEÑAL PORTADORA POR LA SEÑAL DE VIDEO; UN CIRCUITO PRECORRECTOR (3) EN DONDE SE APLICA UNA CORRECCION PARA COMPENSAR LA DISTORSION INTRODUCIDA POR UN PASO DE AMPLIFICACION DE POTENCIA POSTERIOR; UN CONVERTIDOR ELEVADOR (4); UN AMPLIFICADOR (5); UN AMPLIFICADOR DE POTENCIA (6) ACOPLADO A UN DEMODULADOR (8); UNA ANTENA (7); UNOS DISPOSITIVOS (9) DE MEDIDA QUE GENERAN UNA SEÑAL REPRESENTATIVA DE LA DISTORSION EN LA SALIDA DEL AMPLIFICADOR DE POTENCIA; UN CIRCUITO DE ACOPLAMIENTO (10) Y UN COMPUTADOR (11) QUE GENERA UNA SEÑAL DE CONTROL A PARTIR DE LA SEÑAL APLICADA EN (9). SE UTILIZA EN TELEVISION.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08423440A GB2164823A (en) | 1984-09-17 | 1984-09-17 | Television transmitter |
Publications (2)
Publication Number | Publication Date |
---|---|
ES8609857A1 true ES8609857A1 (es) | 1986-09-01 |
ES547052A0 ES547052A0 (es) | 1986-09-01 |
Family
ID=10566834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES547052A Expired ES8609857A1 (es) | 1984-09-17 | 1985-09-17 | Un tranmisor de television |
Country Status (7)
Country | Link |
---|---|
US (1) | US4670789A (es) |
EP (1) | EP0176138B1 (es) |
JP (1) | JPS6174472A (es) |
CA (1) | CA1238406A (es) |
DE (1) | DE3581152D1 (es) |
ES (1) | ES8609857A1 (es) |
GB (1) | GB2164823A (es) |
Families Citing this family (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2176669A (en) * | 1985-06-05 | 1986-12-31 | Philips Electronic Associated | Digitising television signals |
GB2179216B (en) * | 1985-07-02 | 1989-04-26 | English Electric Valve Co Ltd | Amplifying arrangements |
GB2211045B (en) * | 1987-10-10 | 1991-08-21 | Marconi Co Ltd | Linearity adjusting circuit |
US4905086A (en) * | 1987-11-30 | 1990-02-27 | Nec Corporation | Television transmitter employing klystron with nonlinearity correction circuit |
US5125100A (en) * | 1990-07-02 | 1992-06-23 | Katznelson Ron D | Optimal signal synthesis for distortion cancelling multicarrier systems |
US5161021A (en) * | 1990-12-18 | 1992-11-03 | Tsai Ching Yun | Wireless video/audio signal or data transmission device and its remote control circuit |
DE4119796A1 (de) * | 1991-06-15 | 1992-12-17 | Rohde & Schwarz | Fernsehsender mit verzerrungs-korrektureinrichtung |
JP3101102B2 (ja) * | 1992-12-02 | 2000-10-23 | 富士通株式会社 | 電波盗視試験装置 |
FI109740B (fi) * | 1993-06-11 | 2002-09-30 | Nokia Corp | Menetelmä lähetinvastaanotinyksikön testaamiseksi sekä aikajakoisen radiojärjestelmän tukiasema |
US6018358A (en) * | 1994-06-09 | 2000-01-25 | Trilithic, Inc. | Radio frequency leakage detection system for CATV system |
WO1997009798A1 (en) * | 1995-09-07 | 1997-03-13 | Sherwood Robert D | Airplane pilot communication aid |
JPH09199948A (ja) * | 1996-01-12 | 1997-07-31 | Fujitsu Ltd | 非線形補償回路 |
US6278743B1 (en) | 1996-11-12 | 2001-08-21 | Zenith Electronics Corporation | Non linear amplitude precorrection for HDTV transmitter |
US6215514B1 (en) | 1997-06-27 | 2001-04-10 | Trilithic, Inc. | Ingress monitoring system |
US6804826B1 (en) * | 1999-07-28 | 2004-10-12 | Trilithic, Inc. | Radio frequency leakage detection system for CATV system |
US7151807B2 (en) * | 2001-04-27 | 2006-12-19 | The Directv Group, Inc. | Fast acquisition of timing and carrier frequency from received signal |
US7184473B2 (en) * | 2001-04-27 | 2007-02-27 | The Directv Group, Inc. | Equalizers for layered modulated and other signals |
US7822154B2 (en) * | 2001-04-27 | 2010-10-26 | The Directv Group, Inc. | Signal, interference and noise power measurement |
US7639759B2 (en) * | 2001-04-27 | 2009-12-29 | The Directv Group, Inc. | Carrier to noise ratio estimations from a received signal |
US7583728B2 (en) * | 2002-10-25 | 2009-09-01 | The Directv Group, Inc. | Equalizers for layered modulated and other signals |
US7471735B2 (en) | 2001-04-27 | 2008-12-30 | The Directv Group, Inc. | Maximizing power and spectral efficiencies for layered and conventional modulations |
US7184489B2 (en) * | 2001-04-27 | 2007-02-27 | The Directv Group, Inc. | Optimization technique for layered modulation |
US8005035B2 (en) * | 2001-04-27 | 2011-08-23 | The Directv Group, Inc. | Online output multiplexer filter measurement |
US7502430B2 (en) * | 2001-04-27 | 2009-03-10 | The Directv Group, Inc. | Coherent averaging for measuring traveling wave tube amplifier nonlinearity |
US7173981B1 (en) * | 2001-04-27 | 2007-02-06 | The Directv Group, Inc. | Dual layer signal processing in a layered modulation digital signal system |
US7209524B2 (en) | 2001-04-27 | 2007-04-24 | The Directv Group, Inc. | Layered modulation for digital signals |
US7423987B2 (en) * | 2001-04-27 | 2008-09-09 | The Directv Group, Inc. | Feeder link configurations to support layered modulation for digital signals |
US7245671B1 (en) | 2001-04-27 | 2007-07-17 | The Directv Group, Inc. | Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers |
US7483505B2 (en) * | 2001-04-27 | 2009-01-27 | The Directv Group, Inc. | Unblind equalizer architecture for digital communication systems |
CA2489569C (en) | 2002-07-01 | 2012-05-22 | The Directv Group, Inc. | Improving hierarchical 8psk performance |
EP1529347B1 (en) * | 2002-07-03 | 2016-08-24 | The Directv Group, Inc. | Method and apparatus for layered modulation |
US7173977B2 (en) * | 2002-10-25 | 2007-02-06 | The Directv Group, Inc. | Method and apparatus for tailoring carrier power requirements according to availability in layered modulation systems |
CA2503530C (en) | 2002-10-25 | 2009-12-22 | The Directv Group, Inc. | Lower complexity layered modulation signal processor |
US7463676B2 (en) * | 2002-10-25 | 2008-12-09 | The Directv Group, Inc. | On-line phase noise measurement for layered modulation |
US7474710B2 (en) * | 2002-10-25 | 2009-01-06 | The Directv Group, Inc. | Amplitude and phase matching for layered modulation reception |
US7529312B2 (en) * | 2002-10-25 | 2009-05-05 | The Directv Group, Inc. | Layered modulation for terrestrial ATSC applications |
US7230480B2 (en) * | 2002-10-25 | 2007-06-12 | The Directv Group, Inc. | Estimating the operating point on a non-linear traveling wave tube amplifier |
US7502429B2 (en) * | 2003-10-10 | 2009-03-10 | The Directv Group, Inc. | Equalization for traveling wave tube amplifier nonlinearity measurements |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB526437A (en) * | 1939-03-16 | 1940-09-18 | Eric Lawrence Casling White | Improvements in or relating to modulated high frequency transmitters |
US2963579A (en) * | 1956-07-20 | 1960-12-06 | Cons Electrodynamics Corp | Stair-step voltage function generator |
GB1125336A (en) * | 1966-03-23 | 1968-08-28 | British Broadcasting Corp | Improvements in amplitude limiters |
GB1246209A (en) * | 1969-05-21 | 1971-09-15 | Marconi Co Ltd | Improvements in or relating to high frequency power amplifying arrangements |
GB1381597A (en) * | 1971-07-22 | 1975-01-22 | Marconi Co Ltd | High frequency amplifier arrangements |
US3730984A (en) * | 1972-03-31 | 1973-05-01 | Columbia Broadcasting Syst Inc | Method and apparatus for automatic video distortion correction |
US4092674A (en) * | 1973-03-22 | 1978-05-30 | Tektronix, Inc. | Video transmission stabilization system |
US3900823A (en) * | 1973-03-28 | 1975-08-19 | Nathan O Sokal | Amplifying and processing apparatus for modulated carrier signals |
DE2424491A1 (de) * | 1974-05-20 | 1975-12-04 | Hans H Plisch Fabrikation Elek | Elektronische schaltung zur linearisierung eines breitbandigen verstaerkers, insbesondere eines fernsehsignal-verstaerkers |
FR2275065A1 (fr) * | 1974-06-11 | 1976-01-09 | Lgt Lab Gen Telecomm | Dispositif amplificateur linearise par correction automatique |
FR2299759A1 (fr) * | 1974-10-22 | 1976-08-27 | Lgt Lab Gen Telecomm | Dispositif correcteur de phase differentielle et emetteur de television comportant un tel dispositif |
FR2301133A1 (fr) * | 1975-02-14 | 1976-09-10 | Thomson Csf | Dispo |
US3996419A (en) * | 1975-05-27 | 1976-12-07 | Westinghouse Electric Corporation | Technique for minimizing multi-path distortion effects in video transmission |
GB1604678A (en) * | 1978-05-30 | 1981-12-16 | Indep Broadcasting Authority | Television systems |
US4249214A (en) * | 1979-03-23 | 1981-02-03 | Rca Corporation | Exciter having incidental phase correction compensation in consonance with output power level |
US4359779A (en) * | 1980-12-08 | 1982-11-16 | International Telephone And Telegraph Corporation | FM Transmitter with frequency ramp phase and amplitude correction means |
US4434440A (en) * | 1981-11-24 | 1984-02-28 | Rca Corporation | FM/TV Transmission system |
FR2520572B1 (fr) * | 1982-01-28 | 1986-01-17 | Lgt Lab Gen Telecomm | Systeme de correction de non-linearites par premodulation en frequences intermediaires dans un equipement de television |
GB8403067D0 (en) * | 1984-02-06 | 1984-03-07 | Indep Broadcasting Authority | Broadcast signal transmitters |
-
1984
- 1984-09-17 GB GB08423440A patent/GB2164823A/en not_active Withdrawn
-
1985
- 1985-09-10 US US06/774,421 patent/US4670789A/en not_active Expired - Fee Related
- 1985-09-12 DE DE8585201453T patent/DE3581152D1/de not_active Expired - Lifetime
- 1985-09-12 EP EP85201453A patent/EP0176138B1/en not_active Expired
- 1985-09-17 JP JP60205170A patent/JPS6174472A/ja active Granted
- 1985-09-17 ES ES547052A patent/ES8609857A1/es not_active Expired
- 1985-09-17 CA CA000490930A patent/CA1238406A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0176138B1 (en) | 1990-12-27 |
GB2164823A (en) | 1986-03-26 |
EP0176138A3 (en) | 1987-02-04 |
US4670789A (en) | 1987-06-02 |
CA1238406A (en) | 1988-06-21 |
JPH052034B2 (es) | 1993-01-11 |
ES547052A0 (es) | 1986-09-01 |
JPS6174472A (ja) | 1986-04-16 |
EP0176138A2 (en) | 1986-04-02 |
GB8423440D0 (en) | 1984-10-24 |
DE3581152D1 (de) | 1991-02-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 19990201 |