CA1197561A - Satellite broadcast signal receiving system - Google Patents
Satellite broadcast signal receiving systemInfo
- Publication number
- CA1197561A CA1197561A CA000412962A CA412962A CA1197561A CA 1197561 A CA1197561 A CA 1197561A CA 000412962 A CA000412962 A CA 000412962A CA 412962 A CA412962 A CA 412962A CA 1197561 A CA1197561 A CA 1197561A
- Authority
- CA
- Canada
- Prior art keywords
- outdoor
- indoor unit
- switching means
- unit
- outdoor unit
- 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
- H04N7/00—Television systems
- H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
- H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
Abstract
ABSTRACT OF THE DISCLOSURE
A satellite broadcast signal receiving system for receiving a plurality of signals of individual transmission bands, which are mutually dif-ferent in frequency and/or polarization angle, transmitted through an artificial satellite, wherein the signals picked up by an antenna or antennas are first applied to a plurality of outdoor units each corresponding to one transmission band and comprising a convertor for converting the incomining signal into an IF signal, and the converted IF signals are then applied through a change-over switch to a common indoor unit including a demodulator to be demodulated for application to a conventional television set or the like.
A satellite broadcast signal receiving system for receiving a plurality of signals of individual transmission bands, which are mutually dif-ferent in frequency and/or polarization angle, transmitted through an artificial satellite, wherein the signals picked up by an antenna or antennas are first applied to a plurality of outdoor units each corresponding to one transmission band and comprising a convertor for converting the incomining signal into an IF signal, and the converted IF signals are then applied through a change-over switch to a common indoor unit including a demodulator to be demodulated for application to a conventional television set or the like.
Description
~ 5259-116 This in~ention relates to a satelli-te hroadcast signal receiving system used for receivlng a plurality of signals of individual bands, which are different mutually in frequency and/
or polarization angle, transmitted through an artificial satellite for applica-tion to a conventional home television set or the llke.
Broadcast signals transmitted through an artificial satellite at very high frequencies are generally amplified and otherwise processed by a particular device after heing received by an antenna or antennas and prior to application to a convention-al home television set or the like. The device is composed ofan outdooor unit generally associated with -the antenna and an indoor unit generally associated with the television set or th~
like, and both units are coupled through a coaxial cable. An example of the device is shown in United States Patent No.
3,839,676 granted October 1, 1974 to Linnecar. The broadcast signals have their own transmission bands which are different mutually in frequency and/or polarization angle, for example.
In the prior art svstems, a single device including outdoor and indoor units has been used exclusively for each transmlssion band, and, therefore, not only the output units but also the indoor units must have the same number as the transmission bands for receiving all of the transmitted signals. However, such system will become more and more massive and expensive with in-crease of the transmission bands and, therefore, unsuitable for entertainment use.
Accordingly, an object of this invention is to pro~ide 3~
an improved structure of such a system for receiving and process-ing a plurality of satellite broadcast signals, which is sign-ificantl.y simpler and cheaper than the prior art ones.
This object can be attained by the present invention which provides a satellite broadcast signal receiving system comprising a plurality of outdoo.r receiviny units for receiving a plurality of broadcast signals and converting them into inter~ediate frequen-cy si.gnals in a common freqllency band, an indoor unit having an input for receiving said intermediate frequency signals from a selected one of said outdoor units, swi-tching means~ a plurality of coaxial cables each coupling a respective outdoor Ullit to said switchi.ng means, means for connecting the input of said in-door unit to said switching means, said switching means selective-ly coupling one of said outdoor units through its associated coax-ial cable to the input of said indoor unit via said connecting means, a power supply coupled to the switching means ~or supplying operating power to said one outdoor unit through the associated coaxial cahle, said switching means including conduc-tion path means coupled through said coaxial cables to said out-door units to supply said operating power thereto through theassociated coaxial cahles and additional conduction path means for feeding respective ones of said intermediate frequency signals for the associated outdoor units to said indoor unit through said coaxial cables and connec-ting means, said switching ~eans selectively applying operating power to said one of said plurality of outdoor units, which selective power application enables a 7~
respective one of said additional conduction path means to close in order to feed sai.d selected, respective intermediate ~requency signal from the se]ectively powered outdoor uni:t to said in-door unit.
Now, the description will be made in more de-tail herein-under with reference to the accompanying drawings, in whicll:
Fi~ure 1 is a block d~a~ram representing an example o~
a satellite broadcast s~gnal rece~ving system according to the prior art; Figure 2 is a block diagram representlng an embodiment of the satellitebroadcast signal receiving system according to this invention; Figure 3 is a schematic circuit diagram repre-senting an embodiment of the change-over s~itch used in the system of Figure 2; and Figure 4 is a schematic circuit diagram repre-senting another embodiment of the change-over switch usable alternatively in place of the switch of Figure 3O
Thoughout the drawings, like reference symbols are used to denote like or corresponding components.
Referring to Figure 1, the prior art satellite broadcast signal receiving system i~ncludes a vertically polari~ed X-band broadcast signal receiving section 1, a horizontally polarized X-band broadcast signal receiving section 2, a vertically polar-ized C-band broadcast signal receiving section 3 and a horizontal-ly polarized C-band broadcast signal receiving sect;.on 4. These signal receiving sections 1, 2, 3 and 4 are composed, respectively, of outdoor units la, 2a, 3a and 4a and indoor units lb, 2b, 3b and 4b. As shown -2a-in the receiving section 1, each outdoor unit, which serves a function of converting each incoming broadcast signal into an IF signal of common L-band, includes high frequency amplifier 5, first mixer 6, first fixed local oscilla-tor 7 and IF amplifier 8, and each indoor unit includes IF amplifier 9, second mixer 10, second variable local oscillator 11, band-pass filter 12, Fr~l de-modulator 13 and power supply 14. The power supplies 14 of the respective in-door units lb, 2b, 3b and 4b are arranged to supply operating currents to the corresponding outdoor units la, 2a, 3a and 4a through coaxial cables 15, 16, 17 and 18, respectively. Parabolic antennas 19 and 20 designed to pick up the broadcast signals from the satellite in X and C-bands, respectively, are coupled to supply these signals to the corresponding outdoor units. Output terminals 21, 22, 23 and 24 of the FM demodulators 13 of the indoor units lb, 2b, 3b and 4b are to be coupled to a common utilization device, such as a home television set, for reproduction or display.
In this system, the indoor units lb, 2b, 3b and 4b can be identical to each other in circuit configuration since all of the outdoor units la, 2a, 3a and 4a provide output signals in the common L-band to the indoor units. The reason why the outdoor units are accompanied with their own indoor units regardless of the above mentioned identity is possible disturbance caused by the broadcast signals other than those to be received. I-lowever, it is trouble-some and uneconomical to manufacture such a system having many indoor units of identical configuration.
Referring next to Figure 2 showing an embodiment of this invention, a common indoor unit 25 is provided for the outdoor units la, 2a, 3a and 4a.
The indoor unit 25 is substantially the same in circuit configuration as the indoor units lb, 2b, 3b and 4b of Figure 1 but differs from the latter in that its input is coupled through a change-over switch 26 to the coaxial cables 15, 16, 17 and 18 from the outputs of -the outdoor units la, 2a, 3a and 4a.
l~hen the indoor lmit 25 is coupled through the change-over switch 26 to the outdoor unit la, for example, in the arrangement of Figure 2, operating current from the power supply 14 of the indoor unit 25 is supplied only to the outdoor unit la through the change-over switch 26 and the coaxial cable 15. Accordingly, only the outdoor unit la is enabled to operate but the other outdoor units 2a, 3a and 4a are disabled. A vertically polarized X-band signal received by the parabolic antenna 19 is converted into an L-band signal in the outdoor ~mit la and applied through the coaxial cable 15 and the change-over switch 26 to the input of the common indoor unit 25. It is evident that similar operations will be executed when the change-over switch 26 is turned to couple the other outdoor units to the input of the common indoor unit 25, respectively.
As described above, in the system of this invention, the operating current source for the outdoor units is included in the common indoor unit and the operating current is supplied through the change-over switch to one of the outdoor units. Accordingly, the outdoor units having no connection to the broad-cast signal to be received cannot operate and, therefore, the signal to be received is never disturbed by the other signals.
Figures 3 and 4 show two embodiments of the change-over switch 26 arranged to supply operating current from the common indoor unit to selected one of the outdoor units and, at the same tiMe, pass the received broadcast signal from the selected outdoor unit to the common indoor unit.
In Figure 3, the coaxial cables 15, 16, 17 and 18 from the outdoor units la, 2a, 3a and 4a are coupled to input terminals INl, IN~, IN3 and IN4, respectively, which are in turn coupled through capacitors Cl, C2~ C3 and C4 to the cathodes of diodes Dl, D2, D3 and D4 whose anodes are coupled in common _ ~ _ through a capacitor C9 to the output terminal OUT, that is, the movable arm o:E
the switch 26, which is coupled to the input of IF amplifier 9 of the indoor unit 25. The input terminals INl, IN2, IN3 and IN4 are also coupled through chokes CHl, Cll2, CH3 and CH4 to fixed contacts 1, 2, 3 and 4 of a switch SWl, which are grounded through capacitors C5, C6, C7 and C8, respectively. The cathodes of the diodes Dl, D2, D3 and D4 are couplecl through chokes Cil5, Cll6, CH7 and CH8 to fixed contacts 1, 2, 3 and 4 of another switch SW2 which is inter-locked with switch SWl. The movable arm o:E switch SWl is grounded through a capacitor Cll, while the movable arm of sw:itch SW2 is grounded directly. The movable arm of switch SWl is also coupled through a choke Clllo to the input of DC supply or power supply 14 of the indoor unit 25. The input of DC supply 14 is grounded through a capacitor C12 and further coupled through a resistor R and a choke CH~ to the anodes of the diodes Dl through D~. The junction of resistor R and choke CHg is grounded through a capacitor C10.
In operation, when the movable arms of switches SWl and SW2 are turned to the fixed contacts 1 as shown, DC operating current is supplied from the source 14 through choke CHlo, sw.itch SWl, choke CHl, input INl and coaxial cable 15 to the outdoor unit la to operate it. In addition, DC voltage is applied from the source 14 through resistor R and choke CH~ to the anode of diode Dl whose cathode is grounded through choke CH5 and switch SW2, to make thi.s diode conduc-tive. Thus, the high frequency signal processed in the outdoor unit la and applied through coaxial cable 15 to input terminal INl is passed through capacitor Cl, conductive diode Dl and capacitor C9 to output terminal OUT and applied to the.indoor unit 25. As readily understood from the above descril,tion, any broad-cast,signal can be selectively introduced into the indoor unit 25 by turning the two-pole multi-throw switch SWl-SW2 to a corresponding contact.
Figure 4 shows a modification of the circuit of Figure 3. In Figure ~, normally-opeTI contacts Sl, S2, S3 and S~ o:E electromagnetic relays RYl, RY2, RY3 and RY4 are inserted in place of diodes Dl, D2, D3 and D~ of Figure 3 and the solenoids L of these relays a.re respectively inserted between chokes C~1l, CH2, CH3 and CH~ and the fixed contacts of switch SWl of Figure 3. The switch SW2 has been removed together with chokes CH5 through C~19, resistor R and capacitor ClO. In operation, when switch SWl is turned to contact l, DC cur-rent is supplied from the source l~ through this contact to the outdoor uni.t la beyond the input INl. This current also energizes the solenoid of relay RYl to close the contact Sl, thereby introducing the broadcast signal from the outdoor unit la through this closed contact Sl to the indoor unit 25. Thus, the same effect as o:E the switch arrangement of Figure 3 is obtained by turning the switch SWl to a selected contact.
The above description has been made in conjunction with some examples only for the purpose of explanation and it does not mean the invention is limited thereto. Various modifications and changes can be made by those skilled :.n the art within the scope of this invention as defined in the appended claims. For example, the invention can be applied to those broadcast signals of clockwise and anticloc]cwise circular polarizations instead of vertical and horizontal polarizations.
or polarization angle, transmitted through an artificial satellite for applica-tion to a conventional home television set or the llke.
Broadcast signals transmitted through an artificial satellite at very high frequencies are generally amplified and otherwise processed by a particular device after heing received by an antenna or antennas and prior to application to a convention-al home television set or the like. The device is composed ofan outdooor unit generally associated with -the antenna and an indoor unit generally associated with the television set or th~
like, and both units are coupled through a coaxial cable. An example of the device is shown in United States Patent No.
3,839,676 granted October 1, 1974 to Linnecar. The broadcast signals have their own transmission bands which are different mutually in frequency and/or polarization angle, for example.
In the prior art svstems, a single device including outdoor and indoor units has been used exclusively for each transmlssion band, and, therefore, not only the output units but also the indoor units must have the same number as the transmission bands for receiving all of the transmitted signals. However, such system will become more and more massive and expensive with in-crease of the transmission bands and, therefore, unsuitable for entertainment use.
Accordingly, an object of this invention is to pro~ide 3~
an improved structure of such a system for receiving and process-ing a plurality of satellite broadcast signals, which is sign-ificantl.y simpler and cheaper than the prior art ones.
This object can be attained by the present invention which provides a satellite broadcast signal receiving system comprising a plurality of outdoo.r receiviny units for receiving a plurality of broadcast signals and converting them into inter~ediate frequen-cy si.gnals in a common freqllency band, an indoor unit having an input for receiving said intermediate frequency signals from a selected one of said outdoor units, swi-tching means~ a plurality of coaxial cables each coupling a respective outdoor Ullit to said switchi.ng means, means for connecting the input of said in-door unit to said switching means, said switching means selective-ly coupling one of said outdoor units through its associated coax-ial cable to the input of said indoor unit via said connecting means, a power supply coupled to the switching means ~or supplying operating power to said one outdoor unit through the associated coaxial cahle, said switching means including conduc-tion path means coupled through said coaxial cables to said out-door units to supply said operating power thereto through theassociated coaxial cahles and additional conduction path means for feeding respective ones of said intermediate frequency signals for the associated outdoor units to said indoor unit through said coaxial cables and connec-ting means, said switching ~eans selectively applying operating power to said one of said plurality of outdoor units, which selective power application enables a 7~
respective one of said additional conduction path means to close in order to feed sai.d selected, respective intermediate ~requency signal from the se]ectively powered outdoor uni:t to said in-door unit.
Now, the description will be made in more de-tail herein-under with reference to the accompanying drawings, in whicll:
Fi~ure 1 is a block d~a~ram representing an example o~
a satellite broadcast s~gnal rece~ving system according to the prior art; Figure 2 is a block diagram representlng an embodiment of the satellitebroadcast signal receiving system according to this invention; Figure 3 is a schematic circuit diagram repre-senting an embodiment of the change-over s~itch used in the system of Figure 2; and Figure 4 is a schematic circuit diagram repre-senting another embodiment of the change-over switch usable alternatively in place of the switch of Figure 3O
Thoughout the drawings, like reference symbols are used to denote like or corresponding components.
Referring to Figure 1, the prior art satellite broadcast signal receiving system i~ncludes a vertically polari~ed X-band broadcast signal receiving section 1, a horizontally polarized X-band broadcast signal receiving section 2, a vertically polar-ized C-band broadcast signal receiving section 3 and a horizontal-ly polarized C-band broadcast signal receiving sect;.on 4. These signal receiving sections 1, 2, 3 and 4 are composed, respectively, of outdoor units la, 2a, 3a and 4a and indoor units lb, 2b, 3b and 4b. As shown -2a-in the receiving section 1, each outdoor unit, which serves a function of converting each incoming broadcast signal into an IF signal of common L-band, includes high frequency amplifier 5, first mixer 6, first fixed local oscilla-tor 7 and IF amplifier 8, and each indoor unit includes IF amplifier 9, second mixer 10, second variable local oscillator 11, band-pass filter 12, Fr~l de-modulator 13 and power supply 14. The power supplies 14 of the respective in-door units lb, 2b, 3b and 4b are arranged to supply operating currents to the corresponding outdoor units la, 2a, 3a and 4a through coaxial cables 15, 16, 17 and 18, respectively. Parabolic antennas 19 and 20 designed to pick up the broadcast signals from the satellite in X and C-bands, respectively, are coupled to supply these signals to the corresponding outdoor units. Output terminals 21, 22, 23 and 24 of the FM demodulators 13 of the indoor units lb, 2b, 3b and 4b are to be coupled to a common utilization device, such as a home television set, for reproduction or display.
In this system, the indoor units lb, 2b, 3b and 4b can be identical to each other in circuit configuration since all of the outdoor units la, 2a, 3a and 4a provide output signals in the common L-band to the indoor units. The reason why the outdoor units are accompanied with their own indoor units regardless of the above mentioned identity is possible disturbance caused by the broadcast signals other than those to be received. I-lowever, it is trouble-some and uneconomical to manufacture such a system having many indoor units of identical configuration.
Referring next to Figure 2 showing an embodiment of this invention, a common indoor unit 25 is provided for the outdoor units la, 2a, 3a and 4a.
The indoor unit 25 is substantially the same in circuit configuration as the indoor units lb, 2b, 3b and 4b of Figure 1 but differs from the latter in that its input is coupled through a change-over switch 26 to the coaxial cables 15, 16, 17 and 18 from the outputs of -the outdoor units la, 2a, 3a and 4a.
l~hen the indoor lmit 25 is coupled through the change-over switch 26 to the outdoor unit la, for example, in the arrangement of Figure 2, operating current from the power supply 14 of the indoor unit 25 is supplied only to the outdoor unit la through the change-over switch 26 and the coaxial cable 15. Accordingly, only the outdoor unit la is enabled to operate but the other outdoor units 2a, 3a and 4a are disabled. A vertically polarized X-band signal received by the parabolic antenna 19 is converted into an L-band signal in the outdoor ~mit la and applied through the coaxial cable 15 and the change-over switch 26 to the input of the common indoor unit 25. It is evident that similar operations will be executed when the change-over switch 26 is turned to couple the other outdoor units to the input of the common indoor unit 25, respectively.
As described above, in the system of this invention, the operating current source for the outdoor units is included in the common indoor unit and the operating current is supplied through the change-over switch to one of the outdoor units. Accordingly, the outdoor units having no connection to the broad-cast signal to be received cannot operate and, therefore, the signal to be received is never disturbed by the other signals.
Figures 3 and 4 show two embodiments of the change-over switch 26 arranged to supply operating current from the common indoor unit to selected one of the outdoor units and, at the same tiMe, pass the received broadcast signal from the selected outdoor unit to the common indoor unit.
In Figure 3, the coaxial cables 15, 16, 17 and 18 from the outdoor units la, 2a, 3a and 4a are coupled to input terminals INl, IN~, IN3 and IN4, respectively, which are in turn coupled through capacitors Cl, C2~ C3 and C4 to the cathodes of diodes Dl, D2, D3 and D4 whose anodes are coupled in common _ ~ _ through a capacitor C9 to the output terminal OUT, that is, the movable arm o:E
the switch 26, which is coupled to the input of IF amplifier 9 of the indoor unit 25. The input terminals INl, IN2, IN3 and IN4 are also coupled through chokes CHl, Cll2, CH3 and CH4 to fixed contacts 1, 2, 3 and 4 of a switch SWl, which are grounded through capacitors C5, C6, C7 and C8, respectively. The cathodes of the diodes Dl, D2, D3 and D4 are couplecl through chokes Cil5, Cll6, CH7 and CH8 to fixed contacts 1, 2, 3 and 4 of another switch SW2 which is inter-locked with switch SWl. The movable arm o:E switch SWl is grounded through a capacitor Cll, while the movable arm of sw:itch SW2 is grounded directly. The movable arm of switch SWl is also coupled through a choke Clllo to the input of DC supply or power supply 14 of the indoor unit 25. The input of DC supply 14 is grounded through a capacitor C12 and further coupled through a resistor R and a choke CH~ to the anodes of the diodes Dl through D~. The junction of resistor R and choke CHg is grounded through a capacitor C10.
In operation, when the movable arms of switches SWl and SW2 are turned to the fixed contacts 1 as shown, DC operating current is supplied from the source 14 through choke CHlo, sw.itch SWl, choke CHl, input INl and coaxial cable 15 to the outdoor unit la to operate it. In addition, DC voltage is applied from the source 14 through resistor R and choke CH~ to the anode of diode Dl whose cathode is grounded through choke CH5 and switch SW2, to make thi.s diode conduc-tive. Thus, the high frequency signal processed in the outdoor unit la and applied through coaxial cable 15 to input terminal INl is passed through capacitor Cl, conductive diode Dl and capacitor C9 to output terminal OUT and applied to the.indoor unit 25. As readily understood from the above descril,tion, any broad-cast,signal can be selectively introduced into the indoor unit 25 by turning the two-pole multi-throw switch SWl-SW2 to a corresponding contact.
Figure 4 shows a modification of the circuit of Figure 3. In Figure ~, normally-opeTI contacts Sl, S2, S3 and S~ o:E electromagnetic relays RYl, RY2, RY3 and RY4 are inserted in place of diodes Dl, D2, D3 and D~ of Figure 3 and the solenoids L of these relays a.re respectively inserted between chokes C~1l, CH2, CH3 and CH~ and the fixed contacts of switch SWl of Figure 3. The switch SW2 has been removed together with chokes CH5 through C~19, resistor R and capacitor ClO. In operation, when switch SWl is turned to contact l, DC cur-rent is supplied from the source l~ through this contact to the outdoor uni.t la beyond the input INl. This current also energizes the solenoid of relay RYl to close the contact Sl, thereby introducing the broadcast signal from the outdoor unit la through this closed contact Sl to the indoor unit 25. Thus, the same effect as o:E the switch arrangement of Figure 3 is obtained by turning the switch SWl to a selected contact.
The above description has been made in conjunction with some examples only for the purpose of explanation and it does not mean the invention is limited thereto. Various modifications and changes can be made by those skilled :.n the art within the scope of this invention as defined in the appended claims. For example, the invention can be applied to those broadcast signals of clockwise and anticloc]cwise circular polarizations instead of vertical and horizontal polarizations.
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A broadcast signal receiving system comprising a plural-ity of outdoor receiving units for receiving a plurality of broadcast signals and converting them into intermediate frequency signals in a common frequency band, an indoor unit having an input for receiving said intermediate frequency signals from a selected one of said outdoor units, switching means, a plurality of coaxial cables each coupling a respective outdoor unit to said switching means, means for connecting the input of said indoor unit to said switching means, said switching means selectively coupling one of said outdoor units through its associated coaxial cable to the input of said indoor unit via said connecting means, a power supply coupled to the switching means for supplying oper-ating power to said one outdoor unit through the associated coaxial cable, said switching means including conduction path means coupled through said coaxial cables to said outdoor units to supply said operating power thereto through the associated coaxial cables and additional conduction path means for feeding respective ones of said intermediate frequency signals from the associated outdoor units to said indoor unit though said coaxial cables and connecting means, said switching means selectively applying operating power to said one of said plurality of outdoor units, which selective power application enables a respective one of said additional conduction path means to close in order to feed said selected, respective intermediate frequency signal from the selectively powered outdoor unit to said indoor unit.
2. A broadcast signal receiving system according to claim 1 wherein said switching means includes a common capacitor in series with the input to said indoor unit, a plurality of series connected diode/capacitor pairs with each series connected diode/
capacitor pair connected between said common capacitor and a re-spective coaxial cable connected to an associated outdoor unit whereby each diode is positioned in series relationship between two capacitors, a switch, means for applying operating power through at least one inductor via said switch to a selected out-door unit through the coaxial cable associated therewith and means including at least two frequency isolating inductors for producing a current flow through the diode associated with the selected outdoor unit to effect transmission of the respective intermediate frequency signals from the selected outdoor unit to the indoor unit.
capacitor pair connected between said common capacitor and a re-spective coaxial cable connected to an associated outdoor unit whereby each diode is positioned in series relationship between two capacitors, a switch, means for applying operating power through at least one inductor via said switch to a selected out-door unit through the coaxial cable associated therewith and means including at least two frequency isolating inductors for producing a current flow through the diode associated with the selected outdoor unit to effect transmission of the respective intermediate frequency signals from the selected outdoor unit to the indoor unit.
3. A broadcast signal receiving system according to claim 1 wherein said switching means includes a common capacitor in series with the input to said indoor unit, a respective relay means associated with each outdoor unit including signal current control means having two terminals and open and closed positions, each of said signal current control means having one terminal connected to said common capacitor, a series connected capacitor connecting the other terminal of said current control means to the coaxial cable associated with a respective one of said outdoor units, a respective current conducting means having a pair of terminals associated with each current control means to close its respective current control means when current flows there-through, one terminal of each current conducting means being connected through an inductor to the coaxial cable of the associat-ed outdoor unit, said switching means applying an operating current to the other terminal of a current conducting means for energizing the associated outdoor unit and placing the associated signal current control means in said closed position to feed said select-ed, respective intermediate frequency signals from the selected outdoor unit to said indoor unit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56-155916 | 1981-10-19 | ||
| JP1981155916U JPS5861547U (en) | 1981-10-19 | 1981-10-19 | satellite receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1197561A true CA1197561A (en) | 1985-12-03 |
Family
ID=15616308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000412962A Expired CA1197561A (en) | 1981-10-19 | 1982-10-06 | Satellite broadcast signal receiving system |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4509198A (en) |
| JP (1) | JPS5861547U (en) |
| CA (1) | CA1197561A (en) |
| DE (1) | DE3238671A1 (en) |
| FR (1) | FR2514970A1 (en) |
| GB (1) | GB2107539B (en) |
Families Citing this family (69)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60149227A (en) * | 1984-01-13 | 1985-08-06 | Sony Corp | Shf receiver |
| GB2161044B (en) * | 1984-06-28 | 1988-01-27 | Stc Plc | Telephone subscribers circuits |
| US4761827A (en) * | 1984-09-17 | 1988-08-02 | Satellite Technology Services, Inc. | Polarity switch for satellite television receiver |
| US4672687A (en) * | 1985-01-29 | 1987-06-09 | Satellite Technology Services, Inc. | Polarity switch for satellite television receiver |
| JPH07107966B2 (en) * | 1985-07-18 | 1995-11-15 | 株式会社東芝 | Switch distribution device |
| JPH0666707B2 (en) * | 1985-10-21 | 1994-08-24 | ソニー株式会社 | Receiving machine |
| US4907003A (en) * | 1986-12-22 | 1990-03-06 | Microdyne Corporation | Satellite receiver and acquisiton system |
| US4777657A (en) * | 1987-04-01 | 1988-10-11 | Iss Engineering, Inc. | Computer controlled broadband receiver |
| CA1329640C (en) * | 1987-07-24 | 1994-05-17 | Miyoshi Yamauchi | Outdoor unit low noise converter for satellite broadcast reception use |
| JPH0644171Y2 (en) * | 1987-10-01 | 1994-11-14 | シャープ株式会社 | 2-band mixer circuit |
| DE3827105A1 (en) * | 1988-08-10 | 1990-02-15 | Hirschmann Richard Gmbh Co | SATELLITE RECEIVER |
| FR2642598A1 (en) * | 1989-01-27 | 1990-08-03 | Donatec Sa | Apparatus for receiving television broadcast transmissions resent by artificial satellites |
| US5073930A (en) * | 1989-10-19 | 1991-12-17 | Green James A | Method and system for receiving and distributing satellite transmitted television signals |
| JPH03235079A (en) * | 1990-02-13 | 1991-10-21 | Pioneer Electron Corp | Gps receiver |
| GB9008898D0 (en) * | 1990-04-20 | 1990-06-20 | Ferguson Ltd | Receiver for satellite reception |
| KR940002968B1 (en) * | 1990-07-28 | 1994-04-09 | 삼성전자 주식회사 | Double band frequency transformation circuit |
| JP2552030B2 (en) * | 1990-09-27 | 1996-11-06 | マスプロ電工株式会社 | Satellite signal receiver |
| US5666658A (en) * | 1991-03-07 | 1997-09-09 | Recoton Corporation | Wireless signal transmission system, method and apparatus |
| DE4117208A1 (en) * | 1991-05-06 | 1992-11-19 | Teleka Gmbh | Multichannel reception appts. for satellite TV - has one output channel of both polarisation planes supplied to high pass filter for frequency conversion |
| JP2778293B2 (en) * | 1991-07-04 | 1998-07-23 | ソニー株式会社 | Satellite broadcast receiving system and switching distributor |
| JP2788560B2 (en) * | 1991-07-10 | 1998-08-20 | 富士通株式会社 | Receiving satellite switching device |
| JPH05176329A (en) * | 1991-12-20 | 1993-07-13 | Sony Corp | Satellite broadcast receiving system |
| JP3252378B2 (en) * | 1992-03-30 | 2002-02-04 | ソニー株式会社 | Satellite broadcast receiver |
| US7168084B1 (en) | 1992-12-09 | 2007-01-23 | Sedna Patent Services, Llc | Method and apparatus for targeting virtual objects |
| ES2152712T3 (en) * | 1992-12-09 | 2001-02-01 | Discovery Communicat Inc | DISTRIBUTION SYSTEM OF TELEVISION PROGRAMS. |
| US9286294B2 (en) * | 1992-12-09 | 2016-03-15 | Comcast Ip Holdings I, Llc | Video and digital multimedia aggregator content suggestion engine |
| US5790601A (en) * | 1995-02-21 | 1998-08-04 | Hughes Electronics | Low cost very small aperture satellite terminal |
| US6122482A (en) * | 1995-02-22 | 2000-09-19 | Global Communications, Inc. | Satellite broadcast receiving and distribution system |
| US5805975A (en) * | 1995-02-22 | 1998-09-08 | Green, Sr.; James A. | Satellite broadcast receiving and distribution system |
| US5557617A (en) * | 1995-02-24 | 1996-09-17 | Harris Corporation | Frequency division switching using RF buss |
| US5774788A (en) * | 1995-03-17 | 1998-06-30 | Hughes Electronics | Remote ground terminal having an outdoor unit with a frequency-multiplier |
| JP2988844B2 (en) * | 1995-04-25 | 1999-12-13 | シャープ株式会社 | Switching circuit for satellite broadcast converter. |
| KR0161946B1 (en) * | 1995-11-03 | 1998-12-01 | 구자홍 | Setting detecting apparatus of satellite broadcasting antenna |
| US5956620A (en) * | 1997-01-17 | 1999-09-21 | Com Dev Limited | Analog processor for digital satellites |
| US5940737A (en) * | 1997-02-27 | 1999-08-17 | Hughes Electronics Corporation | Signal selector |
| US5966646A (en) * | 1997-05-13 | 1999-10-12 | Ericsson, Inc. | Dual-band radio receiver |
| US6047162A (en) * | 1997-09-25 | 2000-04-04 | Com Dev Limited | Regional programming in a direct broadcast satellite |
| JPH11103215A (en) * | 1997-09-26 | 1999-04-13 | Matsushita Electric Ind Co Ltd | Microwave mixer circuit and down converter |
| US6944878B1 (en) * | 1999-07-19 | 2005-09-13 | Thomson Licensing S.A. | Method and apparatus for selecting a satellite signal |
| US7142809B1 (en) * | 2001-02-27 | 2006-11-28 | The Directv Group, Inc. | Device and method to locally fill gaps in spotbeam satellite systems with frequency re-use |
| US20020154055A1 (en) * | 2001-04-18 | 2002-10-24 | Robert Davis | LAN based satellite antenna/satellite multiswitch |
| US7908628B2 (en) | 2001-08-03 | 2011-03-15 | Comcast Ip Holdings I, Llc | Video and digital multimedia aggregator content coding and formatting |
| US7793326B2 (en) | 2001-08-03 | 2010-09-07 | Comcast Ip Holdings I, Llc | Video and digital multimedia aggregator |
| JP3920061B2 (en) * | 2001-09-26 | 2007-05-30 | シャープ株式会社 | Local oscillation signal distributor and low noise converter using the same |
| JP2003143028A (en) * | 2001-11-01 | 2003-05-16 | Sharp Corp | Low-noise converter |
| US7428403B2 (en) * | 2001-12-21 | 2008-09-23 | Thomson Licensing | Bi-directional communication apparatus |
| US7954127B2 (en) * | 2002-09-25 | 2011-05-31 | The Directv Group, Inc. | Direct broadcast signal distribution methods |
| US7900230B2 (en) * | 2005-04-01 | 2011-03-01 | The Directv Group, Inc. | Intelligent two-way switching network |
| US7958531B2 (en) | 2005-04-01 | 2011-06-07 | The Directv Group, Inc. | Automatic level control for incoming signals of different signal strengths |
| US8024759B2 (en) * | 2005-04-01 | 2011-09-20 | The Directv Group, Inc. | Backwards-compatible frequency translation module for satellite video delivery |
| US7945932B2 (en) * | 2005-04-01 | 2011-05-17 | The Directv Group, Inc. | Narrow bandwidth signal delivery system |
| US7987486B2 (en) * | 2005-04-01 | 2011-07-26 | The Directv Group, Inc. | System architecture for control and signal distribution on coaxial cable |
| US8549565B2 (en) * | 2005-04-01 | 2013-10-01 | The Directv Group, Inc. | Power balancing signal combiner |
| US8621525B2 (en) * | 2005-04-01 | 2013-12-31 | The Directv Group, Inc. | Signal injection via power supply |
| US7950038B2 (en) * | 2005-04-01 | 2011-05-24 | The Directv Group, Inc. | Transponder tuning and mapping |
| US8789115B2 (en) * | 2005-09-02 | 2014-07-22 | The Directv Group, Inc. | Frequency translation module discovery and configuration |
| US7937732B2 (en) * | 2005-09-02 | 2011-05-03 | The Directv Group, Inc. | Network fraud prevention via registration and verification |
| US20080016535A1 (en) * | 2005-09-02 | 2008-01-17 | The Directv Group, Inc. | Frequency shift key control in video delivery systems |
| US8019275B2 (en) * | 2005-10-12 | 2011-09-13 | The Directv Group, Inc. | Band upconverter approach to KA/KU signal distribution |
| US7991348B2 (en) | 2005-10-12 | 2011-08-02 | The Directv Group, Inc. | Triple band combining approach to satellite signal distribution |
| US20070089142A1 (en) * | 2005-10-14 | 2007-04-19 | John Norin | Band converter approach to Ka/Ku signal distribution |
| FR2898006B1 (en) * | 2006-02-28 | 2009-01-02 | Tonna Electronique Sa | SYSTEM FOR DISTRIBUTING AUDIOVISUAL SATELLITE PROGRAMS, IN A COLLECTIVE ENVIRONMENT, AND FOR SIMULTANEOUSLY DISTRIBUTING PROGRAMS ISSUED BY SEVERAL SATELLITES |
| BRPI0712582A2 (en) * | 2006-06-09 | 2012-10-16 | Directv Group Inc | system for receiving satellite video signals for display on a monitor and apparatus for displaying video information |
| WO2007149403A2 (en) * | 2006-06-16 | 2007-12-27 | The Directv Group, Inc. | Digital storage media command and control data indexing |
| US8719875B2 (en) | 2006-11-06 | 2014-05-06 | The Directv Group, Inc. | Satellite television IP bitstream generator receiving unit |
| US8712318B2 (en) | 2007-05-29 | 2014-04-29 | The Directv Group, Inc. | Integrated multi-sat LNB and frequency translation module |
| US8238813B1 (en) | 2007-08-20 | 2012-08-07 | The Directv Group, Inc. | Computationally efficient design for broadcast satellite single wire and/or direct demod interface |
| US9942618B2 (en) * | 2007-10-31 | 2018-04-10 | The Directv Group, Inc. | SMATV headend using IP transport stream input and method for operating the same |
| AR074992A1 (en) | 2009-01-06 | 2011-03-02 | Directv Group Inc | ESTIMATION OF FREQUENCY RUNNING FOR FREQUENCY CONVERSIONS AND SYSTEM DIAGNOSIS OF LOW-COST EXTERNAL UNITS |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2815440A (en) * | 1953-04-27 | 1957-12-03 | Wendell S Fletcher | Remotely controlled plural antennas and radio frequency amplifiers for receiver |
| US3242433A (en) * | 1962-08-13 | 1966-03-22 | Rca Corp | Uhf adaptor for vhf television receivers |
| GB1359752A (en) * | 1972-05-02 | 1974-07-10 | Mullard Ltd | Reception of hf electrical signals |
| JPS5513445B2 (en) * | 1974-01-24 | 1980-04-09 | ||
| JPS5850666Y2 (en) * | 1977-06-09 | 1983-11-18 | ホーチキ株式会社 | Remote control device for amplifier variable attenuation circuit |
| JPS5513445U (en) * | 1978-07-11 | 1980-01-28 |
-
1981
- 1981-10-19 JP JP1981155916U patent/JPS5861547U/en active Granted
-
1982
- 1982-09-22 US US06/421,083 patent/US4509198A/en not_active Expired - Lifetime
- 1982-09-24 FR FR8216128A patent/FR2514970A1/en active Granted
- 1982-09-28 GB GB08227693A patent/GB2107539B/en not_active Expired
- 1982-10-06 CA CA000412962A patent/CA1197561A/en not_active Expired
- 1982-10-19 DE DE19823238671 patent/DE3238671A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR2514970A1 (en) | 1983-04-22 |
| GB2107539B (en) | 1985-01-30 |
| DE3238671A1 (en) | 1983-05-05 |
| JPS5861547U (en) | 1983-04-25 |
| US4509198A (en) | 1985-04-02 |
| FR2514970B1 (en) | 1985-01-18 |
| JPS6238355Y2 (en) | 1987-09-30 |
| GB2107539A (en) | 1983-04-27 |
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