EP1580833A1 - Device and method for positioning of a dish antenna - Google Patents

Device and method for positioning of a dish antenna Download PDF

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Publication number
EP1580833A1
EP1580833A1 EP05003643A EP05003643A EP1580833A1 EP 1580833 A1 EP1580833 A1 EP 1580833A1 EP 05003643 A EP05003643 A EP 05003643A EP 05003643 A EP05003643 A EP 05003643A EP 1580833 A1 EP1580833 A1 EP 1580833A1
Authority
EP
European Patent Office
Prior art keywords
satellite
indicating
identity
signal
low noise
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.)
Withdrawn
Application number
EP05003643A
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German (de)
English (en)
French (fr)
Inventor
Sven Nylund
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.)
Emitor AB
Original Assignee
Emitor AB
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 Emitor AB filed Critical Emitor AB
Publication of EP1580833A1 publication Critical patent/EP1580833A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/125—Means for positioning
    • H01Q1/1257—Means for positioning using the received signal strength

Definitions

  • the present invention relates to a device for facilitating positioning of a dish antenna having at least one low noise block downconverter for reception of signals from a satellite in a direct broadcast satellite system in accordance with the preamble of claim 1.
  • the present invention also relates to a method for positioning a dish antenna having at least one low noise block downconverter for reception of signals from a satellite in a direct broadcast satellite system in accordance with the preamble of claim 10.
  • Such a system usually comprise a dish antenna and at least one low noise block downconverter (LNB), for reception of signals from a satellite in a direct broadcast satellite system, as well as an integrated receiver/decoder (IRD), often called Set-top-box, as well as the necessary wiring.
  • LNB low noise block downconverter
  • IRD integrated receiver/decoder
  • Satbeeper is a device to be connected between the LNB and the IRD during positioning of the dish antenna.
  • the Satbeeper is arranged to detect and indicate the strength of a signal received by the LNB during positioning and usually arranged to indicate increasing signal strength through producing an acoustical signal the frequency of which increases with increased signal strength, such that correct positioning easily can be determined.
  • a problem associated with current low cost and easy to operate devices of this kind is, that even if they provide an indication of the strength of a signal received by the LNB, a number of direct broadcasting satellites are potential candidates as the origin of the signal received, and the end user will normally have to consult the screen of a television set associated with the IRD in order to establish if the correct satellite has originated the received signal. This often means that the end user will have to undertake an often cumbersome relocation from a position near the antenna, often on a roof or similar, to a position within an associated building housing the IRD and the associated television set. This relocation and renewed antenna positioning operations might have to be undertaken a number of times until reception of the desired satellite has been verified.
  • One object of the invention is to provide an improved low cost and easy to operate device for facilitating positioning of a dish antenna having at least one low noise block downconverter for reception of signals from a satellite in a direct broadcast satellite system.
  • a further object of the invention is to provide an improved method for positioning a dish antenna having at least one low noise block downconverter for reception of signals from a satellite in a direct broadcast satellite system.
  • Fig. 1 illustrates schematically the components of a satellite television system setup for positioning of the dish antenna in accordance with the present invention
  • Fig. 2 illustrates schematically a device for facilitating positioning of a dish antenna in accordance with one embodiment of the present invention.
  • a satellite television system setup for positioning of a dish antenna 2 comprises: a dish antenna 2 having a low noise block downconverter (LNB) 3 for reception of signals from a satellite (not shown) in a direct broadcast satellite system; and an integrated receiver/decoder (IRD) 5 powering said LNB 3 and associated with a television set 7; a coaxial cable 4 providing a signal path between said LNB 3 and said IRD 5.
  • LNB low noise block downconverter
  • IRD integrated receiver/decoder
  • the Low Noise Block downconverter (LNB) 3 is a device that processes weak satellite signals directed by an antenna reflector 2 into a feedhorn, whilst introducing as little electrical noise as possible in the process.
  • An LNB consists of a microwave detector followed by a high gain, low noise microwave amplifier and a frequency converter, which downconverts a block of frequencies (group of satellite signals) to a lower intermediate frequency range.
  • the feedhorn is often integrated with the LNB in a single mechanical unit.
  • a device 1 for facilitating positioning of said dish antenna 2 for reception of signals from a specific satellite is arranged in the signal path provided by the coaxial cable 4 between the LNB 3 and the IRD 5.
  • the device 1 comprises means for detecting and indicating the strength of a signal received by said LNB 3 arranged to indicate increasing signal strength through producing an acoustical signal the frequency of which increases with increased signal strength. This can e.g. be achieved through rectifying a high frequency (HF) signal obtained by the LNB 3, which rectified signal is thereafter amplified, e.g. in a logarithmic amplifier, passed on to a voltage controlled oscillator and finally to an associated loudspeaker or earphone.
  • HF high frequency
  • the device 1 further comprises means for determining and indicating the identity of the satellite originating the received signals.
  • these means for determining and indicating the identity of the satellite originating the received signals are arranged to determine said identity based on information provided by said IRD 5. This information is preferably provided by the IRD 5 as DiSEqCTM commands.
  • DiSEqCTM Digital Satellite Equipment Control
  • DiSEqCTM Digital Satellite Equipment Control
  • Information is exchanged between devices interconnected by standard coaxial cable by means of a modulated 22 kHz tone.
  • DiSEqCTM is a trademark of Eutelsat.
  • the DiSEqCTM commands provided by the IRD 5 are based on information retrieved from a Network Information Table in a received bit stream signal.
  • the Network Information Table (NIT) is one of four mandatory Service Information tables transmitted with every digital broadcast to identify itself.
  • the means for determining and indicating the identity of the satellite originating the received signals can e.g. be arranged to indicate the identity of a particular satellite through illuminating a light emitting diode (LED) 6 corresponding to said satellite, i.e. the device 1 can thus either be provided with a single LED 6, if the device is adapted for identification of a single satellite, or a plurality of light emitting diodes (not shown), each of which is arranged to identify a respective satellite.
  • LED light emitting diode
  • Figure 2 further shows the device 1 having a first connector 8 providing for a signal path connection to the LNB 3 via a coaxial cable 4.
  • a second connector 9 provides for a signal path connection to the IRD via a coaxial cable 4.
  • a third connector 10 provides connectivity for an earphone 11, by which the user is able to monitor any acoustical signal output provided by the device 1.
  • the means for determining and indicating the identity of the satellite originating the received signals are arranged to indicate said identity through emitting an acoustical signal.
  • the signal strength is indicated acoustically, as described above, the acoustical signal for satellite identification needs to be easily differentiated from the acoustic signal for indicating signal strength.
  • the means connectable in said signal path 4 further comprises means for determining and indicating the signal quality of a received bit stream signal.
  • the means for determining and indicating the signal quality are arranged to determine said signal quality based on information provided by said IRD as DiSEqCTM commands, as above, which DiSEqCTM commands in this case are based on a determination of the Bit Error Rate (BER) of the received bit stream signal.
  • BER Bit Error Rate
  • the Bit Error Rate is the number of bits received in error divided by the number of bits sent. This term is an important indicator of the qualitative performance of the digital system and as such very useful information to have at hand whilst positioning the dish antenna 2.
  • the present invention also relates to a system for positioning a dish antenna 2 having at least one low noise block downconverter (LNB) 3 for reception of signals from a satellite in a direct broadcast satellite system.
  • the system in accordance with the present invention comprises an integrated receiver/decoder (IRD) 5 for powering a LNB 3 corresponding to a satellite, and means 4 for providing a signal path between said LNB 3 and said IRD 5, such as a coaxial cable, as well as device for detecting and indicating the strength of a signal received by said LNB 3 and determining and indicating the identity of the satellite originating the received signals as described in more detail above.
  • IRD integrated receiver/decoder
  • the present invention also relates to a method for positioning a dish antenna having at least one low noise block downconverter (LNB) for reception of signals from a satellite in a direct broadcast satellite system.
  • the method in accordance with the present invention comprises the steps of: arranging in a signal path, e.g.
  • a coaxial cable connection between said LNB and an integrated receiver/decoder (IRD) means for detecting and indicating the strength of a signal received by said LNB; and arranging in said signal path means for determining and indicating the identity of the satellite originating the received signals; and adjusting the positioning of said dish antenna until said means for detecting and indicating the strength of a signal received by said LNB indicates an acceptable signal strength and said means for determining and indicating the identity of the satellite originating the received signals indicates the desired satellite
  • ITD integrated receiver/decoder

Landscapes

  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Circuits Of Receivers In General (AREA)
EP05003643A 2004-03-18 2005-02-21 Device and method for positioning of a dish antenna Withdrawn EP1580833A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0400711 2004-03-18
SE0400711A SE526934C2 (sv) 2004-03-18 2004-03-18 Anordning och metod för inställning av en parabolantenn

Publications (1)

Publication Number Publication Date
EP1580833A1 true EP1580833A1 (en) 2005-09-28

Family

ID=32067467

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05003643A Withdrawn EP1580833A1 (en) 2004-03-18 2005-02-21 Device and method for positioning of a dish antenna

Country Status (2)

Country Link
EP (1) EP1580833A1 (sv)
SE (1) SE526934C2 (sv)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20080692A1 (it) * 2008-11-13 2010-05-14 Stab S R L Rotore per antenna parabolica e procedimento di installazione di un'antenna parabolica.
ITBO20080725A1 (it) * 2008-12-01 2010-06-02 Stab S R L Dispositivo rilevatore di segnale per installare antenne paraboliche.
EP2830241A1 (en) * 2013-07-23 2015-01-28 Advanced Digital Broadcast S.A. A method and system for determining parameters of a satellite signal
EP1860454B1 (de) * 2006-05-24 2015-05-06 Schwaiger GmbH Messgerät zur Erfassung und Anzeige verschiedener Satellitenpositionen bei einer Satelliten-Empfangsanlage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5386587A (en) * 1991-12-20 1995-01-31 Sony Corporation Satellite broadcasting receiving system with reception level indicator using control signal from receiver
US5749046A (en) * 1994-07-05 1998-05-05 Dx Antenna Company, Limited Signal level measuring apparatus for directing an antenna toward a satellite
US5966638A (en) * 1995-04-25 1999-10-12 Sony Corporation Receiving apparatus, signal demodulating method, antenna apparatus, receiving system and antenna direction adjusting method
WO2000024083A1 (en) * 1998-10-16 2000-04-27 British Sky Broadcasting Limited An antenna alignment meter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5386587A (en) * 1991-12-20 1995-01-31 Sony Corporation Satellite broadcasting receiving system with reception level indicator using control signal from receiver
US5749046A (en) * 1994-07-05 1998-05-05 Dx Antenna Company, Limited Signal level measuring apparatus for directing an antenna toward a satellite
US5966638A (en) * 1995-04-25 1999-10-12 Sony Corporation Receiving apparatus, signal demodulating method, antenna apparatus, receiving system and antenna direction adjusting method
WO2000024083A1 (en) * 1998-10-16 2000-04-27 British Sky Broadcasting Limited An antenna alignment meter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1860454B1 (de) * 2006-05-24 2015-05-06 Schwaiger GmbH Messgerät zur Erfassung und Anzeige verschiedener Satellitenpositionen bei einer Satelliten-Empfangsanlage
ITBO20080692A1 (it) * 2008-11-13 2010-05-14 Stab S R L Rotore per antenna parabolica e procedimento di installazione di un'antenna parabolica.
ITBO20080725A1 (it) * 2008-12-01 2010-06-02 Stab S R L Dispositivo rilevatore di segnale per installare antenne paraboliche.
EP2830241A1 (en) * 2013-07-23 2015-01-28 Advanced Digital Broadcast S.A. A method and system for determining parameters of a satellite signal
US9360513B2 (en) 2013-07-23 2016-06-07 Advanced Digital Broadcast S.A. Method and system for determining parameters of a satellite signal

Also Published As

Publication number Publication date
SE0400711D0 (sv) 2004-03-18
SE526934C2 (sv) 2005-11-22
SE0400711L (sv) 2005-09-19

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