JP3065487B2 - Satellite receiver control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling a satellite receiver for receiving a signal transmitted from a geostationary satellite, for example, a broadcasting satellite or a communication satellite, for example, a satellite broadcasting signal or a satellite communication signal.

[0002]

2. Description of the Related Art Some satellite receivers have the following configuration. A satellite broadcast signal received by a satellite broadcast receiving antenna is frequency-converted into a 1 GHz band first intermediate frequency signal by a converter attached to the satellite broadcast receiving antenna and supplied to a satellite broadcast and satellite communication receiver. . Further, the satellite communication signal received by the satellite communication receiving antenna is frequency-converted into a 1 GHz band first intermediate frequency signal by a converter attached to the satellite communication receiving antenna, and supplied to the receiver. The receiver demodulates the input satellite broadcast first intermediate frequency signal and satellite communication first intermediate frequency signal into a video signal and an audio signal, respectively. These demodulated video and audio signals are supplied to a television receiver when the receiver is used at home, and to a television modulator when used at the head end. And modulates the carrier at the desired channel frequency and provides the modulated signal to the mains of the co-hearing facility.

[0003] Incidentally, there are many channels in satellite broadcasting, and there are many channels in satellite communication. Also, while circular polarization is used for the polarization of satellite broadcasting, vertical or horizontal polarization is used for the polarization of satellite communication. In addition, satellite communication includes one having the same transmission bandwidth as satellite broadcasting and one having a different transmission bandwidth. Then, the receiver does not receive all the channels of each satellite broadcast and each satellite communication at the same time, but selects and receives one of them.

Therefore, it is necessary to change the selection of the polarization and the bandwidth of the filter in the receiver according to the channel of the satellite to be received. That is, it is necessary to set the reception mode according to the channel to be received. Conventionally, such a change of the reception mode has been performed by manually operating a button provided on the front of the receiver.

[0005]

However, such switching of the receiving mode requires manual operation of each button, and has a problem that the operation is troublesome.
In particular, when used in a head end or the like, there are cases where it is desired to change the reception mode at various predetermined times. In such a case, the operator must operate the buttons one by one every time a predetermined time comes, which is very troublesome.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a first method in which a signal from a geostationary satellite received by a satellite signal receiving antenna is frequency-converted by a converter.
Storage means which is provided in a satellite receiver to which the intermediate frequency signal is supplied, and which stores in advance reception modes of different contents indicating reception conditions in the receiver, and which is provided outside the satellite receiver. A switch automatically opened and closed, and a switch provided in the satellite receiver, connected to the switch, and reading a reception mode corresponding to an open / closed state of the switch from the storage means and setting the reception mode in the receiver. And control means.

One switch is provided, and the number of times the switch is opened and closed is associated with each of the reception modes, and the control means sets the reception mode corresponding to the number of times the switch is opened and closed. You can also.

In addition, a plurality of switches are provided, and the respective open / close states of the switches correspond to the respective reception modes, and the control means sets the reception mode corresponding to the open / close states of the respective switches. You can also.

Further, a plurality of the switches are provided, and the number of repetitions of the open / closed states of the switches and the respective reception modes correspond to each other, and the control means corresponds to the number of repetitions of the open / closed states of the switches. The receiving mode can be set.

[0010]

According to the present invention, when a switch provided outside the satellite receiver is automatically opened and closed, the control unit in the satellite receiver detects this and stores the reception mode according to the opening and closing. From the satellite receiver and set the satellite receiver to the selected state. As a mode of opening and closing the switch,
For example, as described above, each reception mode corresponds to the number of times of opening and closing of one switch, one corresponding to each reception mode to the opening and closing state of a plurality of switches, and the number of times of repeating the opening and closing state of a plurality of switches. Some reception modes correspond.

[0011]

1 to 3 show a first embodiment. As shown in FIG. 1, the satellite receiver according to the first embodiment has a satellite signal receiving antenna, for example, a satellite broadcast receiving antenna 2,
4 and a satellite communication receiving antenna 6.

The satellite broadcast receiving antennas 2 and 4 are provided with converters 8 and 10 for frequency-converting each satellite broadcast signal received by the antennas 2 and 4 into a 1 GHz band satellite broadcast first intermediate frequency signal. These satellite broadcast first intermediate frequency signals are supplied to the input terminal 1 of the satellite receiver 12.
4 and 16. Each of the satellite broadcast receiving antennas 2 and 4 is provided with a direction adjusting mechanism 18 and 20 for adjusting the direction thereof so as to face the satellite to be received. The directions of the satellite broadcast receiving antennas 2 and 4 are adjusted.

The satellite communication receiving antenna 6 is provided with a converter 22 for frequency-converting each satellite communication signal received by the antenna 6 into a satellite communication first intermediate frequency signal. Since the satellite communication signal is transmitted by either vertical polarization or horizontal polarization, the changeover switch 24 is switched according to which polarization the satellite communication desired to receive is,
A satellite communication first intermediate frequency signal based on the desired polarization is provided to an input 26 of the satellite receiver 12.

Of the respective satellite broadcast first intermediate frequency signals and the respective satellite communication first intermediate frequency signals supplied to the input terminals 14, 16, 26, the one selected by the changeover switch 28 is supplied to the receiving circuit 30. Is done. The signal supplied to the receiving circuit 30 in this manner is
The signal is demodulated into a baseband video signal and a baseband audio signal and output from the output terminal 32.

In this embodiment, each of the antennas 2, 4, 6,
Since the satellite receiving device including the converters 8, 10, 22 and the satellite receiver 12 is used for the head end,
The baseband video signal and the baseband audio signal from the output terminal 32 are supplied to a television modulator 34, which modulates a carrier having a predetermined frequency. This TV modulator 3
The output signal of No. 4 is sent to the trunk line of a joint hearing facility (not shown).

In the receiving circuit 30, when demodulating each satellite broadcast first intermediate frequency signal and each satellite communication first intermediate frequency signal, the first intermediate frequency signal is first converted into a second intermediate frequency signal having another predetermined frequency. After frequency conversion into frequency signals, the signals are supplied to a demodulation circuit and demodulated. Therefore, when the second intermediate frequency signal is input to the demodulation circuit, a band-pass filter is used to prevent an unnecessary signal from being input. It is necessary to match the bandwidth of the signal and each satellite communication first intermediate frequency signal.

As described above, the first intermediate frequency signal for satellite communication includes a signal having a bandwidth of 27 MHz, which is the same as the first intermediate frequency signal for satellite broadcasting, and a signal having a bandwidth of 30 MHz, which is different from the first intermediate frequency signal. Therefore, when demodulating the satellite broadcast first intermediate frequency signal and the specific satellite communication first intermediate frequency signal, a bandpass filter having a bandwidth of 27 MHz is used to demodulate other satellite communication first intermediate frequency signals. If the bandwidth is 3
The filter must be switched to use a 0 MHz bandpass filter.

As described above, in accordance with the satellite broadcast or satellite communication desired to be received, the direction is adjusted by the direction adjusting mechanisms 18 and 20, the polarization is switched by the changeover switch 24, the input is changed by the changeover switch 28, and the reception circuit 30 It is necessary to switch the band-pass filter. Such a setting state of the device required to receive a certain channel is called a reception mode.

The switching of the receiving mode is performed by a control unit 36 provided in the satellite receiver 12, for example, a microcomputer. Therefore, the storage means including the memory 37 such as the RAM provided in the satellite receiver 12 includes:
As shown in FIG. 2, L parameters of various reception mode parameters (states of the above-described devices) necessary for receiving each channel are stored. That is, it is preset. A preset state number is assigned to each reception mode.

Further, an external controller 38 is provided outside the satellite receiver 12. The external controller 38 has one open / close switch 40 therein, which is connected to the control unit 36 in the satellite receiver 12 via a general-purpose single line, not a dedicated cable. That is, the external controller 38
The open / close switch 40 is connected to the output terminals 42, 42 of
The output terminals 42, 42 are connected to control input terminals 44a, 44b provided on the satellite receiver 12 via a general-purpose single line or the like, and these control input terminals 44a, 44b are connected to the control unit 36.
It is connected to the.

The open / close switch 40 is connected to an external controller 38.
It is automatically opened and closed by a control unit 46 including a computer or a timer provided therein. Then, the control unit 36 reads a reception mode having a preset state number corresponding to the number of times of opening / closing of the open / close switch 40 from the memory 37, and sets the changeover switch 28, the reception circuit 30, and the like to the reception mode state. In addition, 47 is a power supply provided in the satellite receiver 12.

In order to make such settings, the control unit 36
Will be described based on the flowchart shown in FIG. When the power of the satellite receiver 12 is turned on, first, it is determined whether or not the parameters of each reception mode are preset in the memory 37 (step S2).

If preset (step S2 is YES), it is determined whether the preset parameters need to be changed (step S4). This determination is made, for example, by determining whether a specific key (not shown) provided on the satellite receiver 12 has been operated.

When it is necessary to change the parameters (Yes in step S4), or when the parameters of each reception mode are not preset in the memory 37 (step S2).
No), the user operates a key (not shown) provided on the satellite receiver 12 to store various parameters in the preset state numbers 1 to L of the memory 37 (step S6).

Subsequent to step S6 or in memory 37
If the reception mode is preset and the parameter of the reception mode does not need to be changed (the determination in step S2 is YES and the determination in step S4 is NO), the preset state number provided in the control unit 36 is counted. The value of the counter K is set to 1 (step S8). The reception mode corresponding to the value of the counter K (in this case, K = 1) is read from the memory 37, and the state of each device is set to the reception mode (step S9).

Next, it is determined whether the control input terminals 44a and 44b are short-circuited, that is, whether the switch 40 is closed (step S10). If it is not short-circuited (step S
Step S10 is repeated until a short circuit occurs (No in step S10). If a short circuit occurs (YES in step S10), it is determined whether the control input terminals 44a and 44b have been opened (step S12). That is, it is determined whether the switch 40 has been opened. If it is not open (step S
If the determination in step S12 is NO), step S12 is repeated until it is released, and if released (YES in step S12), the value of the counter K is advanced by 1 (step S1).
4). That is, the counter K advances the value by 1 when the switch 40 is changed from the open state to the closed state and becomes the open state again.

Then, it is determined whether the value of the counter K is smaller than or equal to the final value L of the preset state number (step S18). If the value is smaller than or equal to L (step S18 is YES), step S9 is performed. By executing, the reception mode corresponding to the value of the counter K is read from the memory 37, and the state of each device of the receiving apparatus is set to the reception mode. If the value of the counter K is larger than L (No in step S18), the receiving mode of the preset state number is not set any more, so the process returns to step S8, and the value of the counter K is set to 1.

Therefore, each time the switch 40 is short-circuited and opened, the reception mode is sequentially changed. When the switch 40 is short-circuited and opened in the state where the reception mode of the final preset state number L is set, the preset mode The reception mode of state number 1 is set.

The switch 40 is short-circuited and opened by the control unit 46 of the external controller 38.
When the timer 6 is set, when the set time has come, the switch 40 is opened and closed a predetermined number of times to set a predetermined reception mode.

A second embodiment is shown in FIGS. In this embodiment, as shown in FIG. 4, the switch 40 _1, 40 ₂ ···· 40 _n a plurality outside controller in 38a, for example, n
Are provided. These switches 40 ₁ , 40 ₂ ...
40 _n is a common terminal 48 and n output terminals 50 ₁ , 50
It is provided between the _{2 ····} 50 _n. The switches 40 ₁ , 40 _2, ..., 40 _n are automatically opened and closed by the control unit 46a as in the first embodiment.

The common terminal 48 of the external controller 38a is connected to the common terminal 52 of the satellite receiver 12 by a general-purpose wire or the like, and the output terminals 50 ₁ , 50 ₂ ,.
Reference numeral 50 _n is connected to each control input terminal 54 ₁ , 54 ₂ ... 54 _n of the satellite receiver 12 by a general-purpose line or the like.
Common terminal 52 and each control input terminal 54 of the satellite receiver 12
_1, 54 _{2 ····} 54 _n is connected to the control unit 36.

The memory 37 of the satellite receiver 12 stores the parameters of each reception mode corresponding to each preset state number, as in the first embodiment.
Further, as shown in FIG. 6, each of the switches 40 ₁ , 40 _2.
It is also possible to store which preset state number each of the various open / close states of 40 _n corresponds to.

Control performed by the control unit 36 in the satellite receiver 12 in such a configuration will be described with reference to the flowchart shown in FIG. Step S2 from the power-on state to setting to the reception mode of preset state number 1
Steps S8 to S8 are performed in the same manner as in the first embodiment. And
After setting the value of K to 1 in step S8, the reception mode corresponding to the value of the counter K (in this case, K = 1) is read from the memory in step S28, and the preset state number K (in this case, K = 1) The operation of the receiver is controlled (step S28).

The control input terminals 54 ₁ , 54 ₂ ...
It is determined whether any one of the terminals 54 _n is connected to the common terminal 48 (step S20). That is, the switches 40 ₁ , 4
It is determined whether any of 0 ₂ ... 40 _n is closed. If none are closed (step S
20 is no), any of the switches 40 ₁ , 40
Repeated step S20 to ₂ · · · · 40 _n is closed.

Any of the switches 40 ₁ , 40 ₂ ... 4
0 When _n is closed (step S20 the determination is YES), the control input terminals 54 _1, 54 ₂ ···· 54 _n states, among the switches 40 _1, 40 ₂ ···· 40 _n Which is closed is stored (step S22). Next, it is determined whether any of the control input terminals 54 ₁ , 54 ₂ ... 54 _n has been opened (step S24). That is, it is determined whether all the switches 40 ₁ , 40 ₂ ... 40 _n have been opened. If all switches 40 ₁ , 40 ₂ ... 40 _n
Is not released (No in step S24), the process returns to step S20.

All switches 40 ₁ , 40 ₂ ... 40 _n
Is open (Yes in step S24), the control input terminals 5 stored in step S22
The preset state numbers K corresponding to the states of 4 ₁ , 54 ₂ ... 54 _n are determined using the correspondence table (see FIG. 6) in the memory 37 (step S26), and correspond to the preset state numbers K. The state of each device of the receiving apparatus is set to the receiving mode to be performed (step S28), and the process returns to step S20.

Accordingly, each of the switches 40 ₁ , 40 ₂ ... 4
The receiving apparatus can be set to a receiving mode corresponding to the open / close state of 0 _n . In particular, a timer is used for the control unit 46 of the external controller 38, and each time the set time comes, each of the switches 40 ₁ , 40 _2.
By opening and closing _n , programs of different satellites and channels can be automatically switched according to time and transmitted from one satellite receiver 12.

FIG. 7 and FIG. 8 show a third embodiment. In this embodiment, as in the second embodiment, a plurality of switches 40 ₁ , 40 ₂ ... 40 _n are provided as shown in FIG. The preset state of the reception mode in the memory 37 is
This is different from the first and second embodiments.

[0039] That is, in this embodiment, as shown in FIG. 8 (a), according to different opening and closing states of the switches _{40 1, 40 2 ···· 40 n} , the preset state of the example A to Z Various reception modes are allocated according to the number of repetitions of each of the preset states. For example, _assuming that a state in which only one of the switches 40 ₁ , 40 ₂ ... 40 _n is closed is a preset state A, only this one switch is closed as shown in FIG. In contrast to the state in which the reception mode is performed only once, the reception mode of the preset state number A-1 is assigned, and the state in which only the one switch is closed is repeated twice. , Preset state number A-
Two reception modes are assigned,..., While the state in which only the one switch is closed is repeated L times, whereas the reception mode of the preset state numbers AL is assigned.

Similarly, as shown in FIGS. 8 (c) and 8 (d), various reception modes are assigned to other preset states according to the number of repetitions of the switch corresponding to the preset state. ing. Various parameters of the reception mode corresponding to various numbers of such preset states are stored in the memory 37.

Control performed by the control unit 36 in the satellite receiver 12 in such a configuration will be described with reference to the flowchart shown in FIG. From the power-on state, the memory 37
Steps S2 to S6 for checking the state of the above and performing the processing corresponding thereto are performed in the same manner as in the first embodiment.

Then, the reception mode corresponding to the preset state number A-1 is set (step S30). Next, the control input terminals 54 _1, 54 ₂ ···· 54 _n Do are all open, i.e. it is determined whether the switches 40 _1, 40 ₂ ···· 40 _n are all opened (step S32). If they are all open (Yes in step S32),
Until one of the switches 40 ₁ , 40 ₂ ... 40 _n is closed (until the determination in step S32 becomes NO).
Step S32 is repeated.

Any of the switches 40 ₁ , 40 ₂ ... 4
0 _n are closed, the control input terminals 54 ₁ , 54 _2.
· · 54 _n shorts, detects the opening, i.e. which is opened among the switches _{40 1, 40 2 ···· 40 n} , which detects whether it is closed, corresponding to the detected contents The first part P of the preset state number to be performed is determined (step S34).

Subsequently, the value of a counter K for counting the number of repetitions of the previously detected preset state number is incremented by 1 (step S36). The value of the counter K is the second part of the preset state number.

Then, it is determined whether or not all the control input terminals 54 are open (step S38). If not open (No in step S38), step S38 is repeated until the control input terminals 54 are open. When all of the control input terminals 54 are opened (the determination in step S38 is YES), the P-state including the first part and the second part of the preset state number is set.
The reception mode corresponding to K is set (step S4).
0).

Next, it is determined whether the value of the counter K is smaller than the final number of repetitions L (step S42). If the value of the counter K is smaller than L (step S4)
If the determination of step 2 is yes, step S32
Return to If the value of the counter K is larger than L (No in step S42), the counter K
Is set to 0 (step S44), and the process returns to step S32.

Therefore, each of the switches 40 ₁ , 40 ₂ ... 4
The receiving mode is sequentially changed by short-circuiting and opening 0 _n to a certain state and repeating this state. Also, the state of each switch 40 ₁ , 40 ₂ ... 40 _n is short-circuited and opened to another state, and this state is repeated, whereby the reception mode is sequentially changed.

Also in this embodiment, the switches 40 ₁ ,
40 ₂ .... 40 _n shorts, open, so performed by the control unit 46, for example, when the control unit 46 is a timer, when the set time, the switch 40 _1, 40 ₂ ... 4
By opening and closing the 0 _n, it can be a predetermined reception mode.

In each of the above embodiments, two satellite broadcast receiving antennas and one satellite communication receiving antenna are used, but the number of antennas can be arbitrarily changed according to the situation. Further, when the polarizations from a plurality of satellites are horizontal and vertical, a mechanism may be provided that can perform polarization adjustment and direction adjustment with one antenna.

[0050]

As described above, according to the first aspect of the present invention, the satellite receiving apparatus is automatically set to the receiving mode corresponding to the open / closed state of the automatically opened / closed switch. The desired reception mode can be automatically set at a preset time, so that it is not necessary for the operator to operate one by one. In addition, the configuration for that only needs to connect the switch that is automatically opened and closed to the control means in the satellite receiver. The configuration is very simple, and the contents of the presets of a plurality of satellite receivers are the same. It is also possible to control a plurality of satellite receivers by simply changing the state number and attaching a switch in parallel with the plurality of satellite receivers.

According to the second aspect of the present invention, since only one switch is used, the circuit configuration can be further simplified.

Further, according to the third aspect of the present invention, since a plurality of switches are used and the receiving mode can be switched in accordance with the open / closed state of these switches, many receiving modes can be set. . In addition, in the first aspect of the present invention, the switching of the reception mode is performed by the number of times of opening / closing of one switch. Although it takes time, according to the third aspect of the invention, a desired reception mode can be set in a short time.

According to the fourth aspect of the present invention, the plurality of switches are set to various open / close states, and the receiving mode is switched according to the number of repetitions of the open / close states. According to the present invention, many reception modes can be set.

[Brief description of the drawings]

FIG. 1 is a block diagram of a first embodiment of a control device for a satellite receiver according to the present invention.

FIG. 2 is a diagram showing storage contents of a memory used in the first embodiment.

FIG. 3 is a flowchart of the first embodiment.

FIG. 4 is a block diagram of a main part of the second embodiment.

FIG. 5 is a flowchart of the second embodiment.

FIG. 6 is a diagram showing the contents of a memory used in the second embodiment.

FIG. 7 is a flowchart of the third embodiment.

FIG. 8 is a diagram showing the contents of a memory used in the third embodiment.

[Explanation of symbols]

 2 4 Satellite broadcast receiving antenna 6 Satellite communication receiving antenna 8 10 22 Converter 12 Satellite receiver 36 Control unit 37 Memory 40 Switch

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04B 1/08-1/18 H04N 7/20

Claims (4)

(57) [Claims] 1. A receiving state provided in a satellite receiver to which a first intermediate frequency signal obtained by frequency-converting a signal from a geostationary satellite received by a satellite signal receiving antenna by a converter is supplied. Storage means for previously storing reception modes having different contents, a switch provided outside the satellite receiver and automatically opened and closed, and provided inside the satellite receiver and connected to the switch. And a control means for reading a reception mode corresponding to the open / closed state of the switch from the storage means and setting the reception mode in the receiver. 2. The control device for a satellite receiver according to claim 1, wherein one switch is provided, and the number of times the switch is opened / closed is associated with each of the reception modes. A control device for a satellite receiver, wherein the reception mode corresponding to the number of times of opening and closing is set. 3. The control device for a satellite receiver according to claim 1, wherein a plurality of said switches are provided, and different opening / closing states of said switches correspond to said respective reception modes. A control device for a satellite receiver, wherein a reception mode corresponding to the open / closed state of the switch is set. 4. The control device for a satellite receiver according to claim 1, wherein a plurality of said switches are provided, and the number of repetitions of different open / close states of said switches is associated with each of said reception modes. The control device for a satellite receiver, wherein the means sets a reception mode corresponding to the number of repetitions of the open / close state of each switch.