JPS58142634A - Satellite receiving device - Google Patents

Abstract

PURPOSE:To obtain the best receiving state at all times, by providing a display means for executing the display when a signal from an antenna is applied, and its signal level is a specified value or above, on plural antennas, respectively. CONSTITUTION:Parabolic antennas 1, 1a are connected to an adaptor 8 by use of feeder lines 2, 2b, respectively. Subsequently, an output of this adaptor 8 is applied to a television receiver 3a by a feeder line 2a. In this regard, display lamps 7a, 7b of the adaptor 8 are connected as display for the parabolic antennas 1, 1a, and only when a signal from the parabolic antennas 1, 1a is of a specified value or above, the display lamps 7a, 7b are lighted.

Description

[Detailed Description of the Invention] The present invention relates to a satellite receiving device that receives radio waves from the Daio satellite, and provides a device that can accurately confirm whether or not the direction of the antenna of one station on the ground is correct. The purpose is to

In recent years, there has been considerable development in communication technology, and the use of higher Ul' (F and SHF bands) has been significantly developed, avoiding crowded frequency bands. The use of SHF band has become more active.

Communication using the EHF band is also increasingly used. Parabolic antennas, which efficiently transmit and receive weak radio waves, are generally used for transmitting and receiving such high frequencies.

Recently, experiments and practical use using broadcasting satellites have begun. Broadcasting satellites emit, for example, television broadcast waves from geostationary satellites at the equator.
Broadcasting is directly received and enjoyed by each home in the local area without going through an earth station, eliminating the need for conventional microcircuits that require huge amounts of money. This has the great advantage of being able to send content programs at the same time.

Particularly in households hidden behind high-rise buildings in subcommittee meetings, there is a problem in which radio waves from transmission towers cannot be received well for 1 minute, and in remote islands and remote areas, broadcasting equipment is not sufficient, so the radio waves from only a few stations and of poor quality are a problem. There are a lot of problems with RAI 1 that are being received, and resolving them will cost more than you can imagine, but a single broadcasting satellite will solve all of these problems all at once.

With the advent of the era of broadcasting satellites, the Yagi antennas that had been installed on the roofs of each home facing the tower were now equator-L.
A parabolic antenna will be attached to the static image satellite.

The problem here is that in the current situation, the Yagi antenna only needs to be rotated horizontally at 3600 degrees and the tower is directed in one direction, and radio waves can be received well if the direction is in the opposite direction. Therefore, antenna installation 1-military equipment does not require much precision. 1. While navigating, when receiving weak radio waves from a broadcasting satellite with a parabolic antenna, ii:
, 11- It is necessary to point the parabolic antenna exactly in the direction of broadcast technique J11. This accuracy can be improved as the output of the broadcasting satellite increases.Although it is possible to increase the tolerance M of the ζ setting, it is possible to achieve this accuracy by measuring the weak radio waves from the sky in the best possible way. To receive it in the morning, first send the antenna to i.
The first thing to do is to point in the L direction, that is, toward the satellite. Moreover, unlike the current situation, it is not only the east direction of the water, but also the 1-
Since the downward direction also falls within the installation requirements, the installation work is extremely difficult, similar to that of a typical Jc. Whether or not good radio waves can be received no matter how far the parabolic antenna is oriented toward the broadcasting satellite is determined by the output of the broadcasting satellite and other conditions. However, the angle is generally limited to a few degrees, and good reception cannot be expected at angles beyond that.

On the other hand, if such systems become commonplace and enter every household, new problems will arise. It is a problem of ←j parabola type middle line direction. Even today, when the reception of a television receiver becomes poor, people mistakenly think that the problem is with the antenna system, even though the problem actually lies with the antenna system, and people often turn the adjustment knobs without realizing it, or service personnel are called out. Phenomena such as "calling" have been observed, but it is thought that such phenomena will become more common as the era of parabolic antennas for home use arrives.

Even if the IF reception is poor when the parabolic antenna is first installed, it can withstand earthquakes, typhoons, snow, lightning strikes, heavy rain, strong winds, vibrations from airplanes, trains, automobiles, etc., high winds, peak periods, severe cold, etc. Due to temperature changes in the antenna (↓ deterioration, natural loosening of the installation due to aging, tilting of the house □ on which the parabolic antenna is mounted, board sinking, children's pranks, birds and maru, etc.) Due to various reasons, the direction of the parabolic antenna may deviate.If the parabolic antenna deviates beyond the allowable angle, the television receiver will naturally not be able to receive normal IE images. To an untrained eye, it appears that the television receiver itself is malfunctioning.

Therefore, the strength of the radio waves received by the parabolic antenna is ia
If the radio field strength reaches a certain value or higher, it will be displayed and the user will be informed that the parabolic antenna is not pointing in the correct direction. It is convenient because you can immediately know that there is a problem with the orientation of the parabolic antenna and take appropriate measures.

Hereinafter, the configuration that has been prepared prior to the present invention will be explained.

As shown in FIG. 1, ? from a satellite received by parabolic antenna 1? The TL wave is guided to a television receiver 3 through a feeder line 2. In this way, you can receive television broadcasts like never before.

FIG. 2 shows a display circuit of the present invention. A part of the received signal received by the parabolic antenna 1 is applied from the terminal 4 to the Schmitt trigger circuit 5. The received signal is constantly detected by the signal circuit 5, and when the level of the received signal is higher than a certain fixed level, the transistor 6 is turned on and the display lamp is turned on. 7 is turned on, and when this indicator lamp 7 is on, it is displayed to the user that the parabolic antenna 1 is correctly oriented in the direction of the satellite.

If the parabolic antenna 1 deviates from the correct direction, the reception level will drop and the output of the Schmitt trigger circuit 5 will drop. Therefore, the base potential of the transistor 6 becomes low, so the transistor 6 becomes non-conductive and the display lamp 7
The lights go out.

Therefore, the user knows that the cause of image disturbance is that the parabolic antenna 1 is oriented incorrectly.

Therefore, you can immediately go to adjust the direction of antenna 1. If you still cannot get a good reception condition, you will know that the cause is in the circuit of the pre-vision receiver itself. In addition, this indicator lamp 7 is extremely useful for easily finding the correct satellite direction when a new parabolic antenna is installed or replaced during normal use.

Furthermore, instead of providing the display lamp 7a on the main body of the television receiver 3a, it is also possible to interpose a display adapter 8 between the parabolic antenna 1 and the television receiver 3a as shown in FIG. . By using such an adapter, the conventional 6J1 TV receiver 3a can be used as is.
This is a feeder line that connects the adapter 8 and the television receiver 3a.

The present invention makes it possible to use a plurality of antennas in the face of such a disaster, and will be described below with reference to FIG. 4.

As shown in FIG. 4, parabolic antennas 1 and 18 are connected to adapter 8 using feeder lines 2 and 2b, respectively. The Ill force of this adapter 8 is applied to the television receiver 3a through the feeder line 2a.

Indicator lamp 7a of adapter 8 [display for parabolic antenna 1; indicator lamp 7b is for parabolic antenna 1
It is connected as a display for a.

This adapter 8 can house IT, booster, and other antenna circuits all at once. In such a usage example, for example, the antenna 1 may be directed toward a satellite, and the antenna 1a may be used for broadcast reception only in a limited area.

In addition, in the first embodiment, a parabolic type antenna was used as an example of the antenna, but the antenna is not limited to this as long as it can receive radio waves from a satellite (Yagi type, ring type, etc.) Q1: Of course, the display lamp is not limited to an incandescent nail or the like, and can be replaced with another display.

As mentioned above, according to the present invention, each home can easily receive RJZ waves from a satellite using an adapter. I'-na lI
With the I'r configuration, you can know the +F and L directions of multiple antennas, so you can always obtain the best reception condition. Furthermore, it is possible to quickly determine whether the cause of the image failure is the antenna or the TV receiver.

Furthermore, depending on the role, you can choose whether to turn on the indicator lamp when the antenna is facing 1F, 1F, or 11.

[Brief explanation of drawings]

Fig. 1 is a system diagram of a satellite receiving device conceived prior to the present invention, Fig. 2 is a circuit diagram of an intermediary device, Fig. 3 is a further system diagram, and Fig. 4 is a satellite receiving device according to an embodiment of the present invention. FIG. 2 is a system diagram of a receiving device. 1.18... Parabolic antenna, 3d...
... Television receiver, 7a, 7b ... Display lamp, 8 ... Adapter. Name of agent: Patent attorney Toshio Nakao, 1st person, 2nd person
Figure 10 Figure 4

Claims (3)

[Claims] (1) Equipped with a plurality of antennas and a television receiver to which signals are supplied from the antennas, the signal from the antennas described in 1 is applied and the signal level exceeds a certain value -1-
A display f stage for displaying whether or not is inserted between the plurality of antennas and the television receiver, and the display means corresponding to each of the plurality of antennas. Satellite receiving device installed. (2) The satellite receiving device according to claim 1, wherein the display means is turned on only when the signal from the antenna is less than a certain value (1-). (3) A satellite receiving device according to claim 1, which uses a light emitting body as a display means.