JP2508461B2 - Satellite receiver - Google Patents
Satellite receiverInfo
- Publication number
- JP2508461B2 JP2508461B2 JP61165416A JP16541686A JP2508461B2 JP 2508461 B2 JP2508461 B2 JP 2508461B2 JP 61165416 A JP61165416 A JP 61165416A JP 16541686 A JP16541686 A JP 16541686A JP 2508461 B2 JP2508461 B2 JP 2508461B2
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- Prior art keywords
- antenna
- channel
- broadcast wave
- band
- circuit
- Prior art date
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- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radio Relay Systems (AREA)
Description
【発明の詳細な説明】 Ａ 産業上の利用分野 本発明は衛星放送受信機に関し、特にＣバンド（４
〔GHz〕帯）の衛星放送受信機に適用して好適なもので
ある。The present invention relates to a satellite broadcast receiver, and more particularly to the C band (4
It is suitable for application to [GHz] band) satellite broadcast receivers.
Ｂ 発明の概要 本発明は、衛星放送受信機において、衛星放送受信機
の受信波の通過帯域幅を狭くしてアンテナの偏波面を調
整することにより、隣接チヤンネルの放送波の影響や地
上マイクロ波回線の妨害を受けないでアンテナの偏波面
を調整するようにとしたものである。B Outline of the Invention The present invention is, in a satellite broadcast receiver, narrowing the pass band width of the received wave of the satellite broadcast receiver to adjust the polarization plane of the antenna, thereby affecting the influence of the broadcast wave of the adjacent channel and the ground microwave. The polarization plane of the antenna is adjusted without interference from the line interference.
Ｃ 従来の技術 従来、米国等のＣバンドの衛星放送は第４図に示すよ
うに所定の放送周波数帯域内で、できるだけ多くのチヤ
ンネルの放送波を放送するために、隣り合うチヤンネル
の放送波の帯域B1、B2、B3が一部重なり合うように、各
チヤンネルの放送波の周波数帯域を20〔MHz〕間隔で割
り当てるようになされている。C Conventional Technology Conventionally, in the C band satellite broadcasting in the United States and the like, in order to broadcast as many channels of a channel as possible within a predetermined broadcasting frequency band as shown in FIG. The frequency bands of the broadcast waves of the respective channels are allocated at intervals of 20 MHz so that the bands B 1 , B 2 and B 3 partially overlap each other.
そして、隣り合うチヤンネルの放送波に互いに偏波面
が90°異なる水平偏波及び垂直偏波の直線偏波の放送波
を割り当てることにより、隣り合うチヤンネルの放送波
間の混信を防止するようになされている。Then, by allocating the broadcast waves of the horizontal polarization and the vertical polarization of which the polarization planes are different from each other by 90 ° to the broadcast waves of the adjacent channels, the interference between the broadcast waves of the adjacent channels is prevented. There is.
従つて混信のない衛星放送を受信するためには、受信
しようとするチヤンネルの放送波の偏波面と受信アンテ
ナの偏波面とが一致するように、アンテナの偏波面を切
り換える必要がある。Therefore, in order to receive satellite broadcasting without interference, it is necessary to switch the polarization plane of the antenna so that the polarization plane of the broadcast wave of the channel to be received matches the polarization plane of the receiving antenna.
このためアンテナを設置した際に、予めアンテナの偏
波面と所望のチヤンネルの放送波の偏波面とが一致する
位置を各放送衛星ごとに求めておき、受信チヤンネルを
切り換えると自動的にアンテナの偏波面を切り換えて、
最適な受信状態を得るようになされている。Therefore, when an antenna is installed, the position where the plane of polarization of the antenna matches the plane of polarization of the broadcast wave of the desired channel is found in advance for each broadcasting satellite, and the antenna polarization is automatically changed when the reception channel is switched. Switch the wavefront,
It is designed to obtain the optimum reception condition.
従来、この放送波の偏波面とアンテナの偏波面とが一
致する位置を求めるために、衛星放送受信機のAGC（aut
omatic gain control）電圧をモニタしながら、アンテ
ナの偏波面を微調整する方法が用いられている。Conventionally, in order to find the position where the plane of polarization of this broadcast wave and the plane of polarization of the antenna match, the AGC (aut
omatic gain control) A method of finely adjusting the polarization plane of the antenna while monitoring the voltage is used.
すなわち、衛星放送受信機の受信アンテナの放送波の
偏波面とアンテナの偏波面とが一致すると、チヤンネル
を介して得られる当該受信チヤンネルの放送波の信号が
最大値をとることに注目して、AGC電圧が最大値をとる
アンテナの偏波面の位置を求めることによつて受信チヤ
ンネルの放送波の偏波面とアンテナの偏波面とが一致す
る位置を求めるようになされている。That is, when the polarization plane of the broadcast wave of the reception antenna of the satellite broadcast receiver and the polarization plane of the antenna match, the signal of the broadcast wave of the reception channel obtained via the channel takes the maximum value, By finding the position of the antenna polarization plane where the AGC voltage takes the maximum value, the position where the polarization plane of the broadcast wave of the reception channel and the polarization plane of the antenna coincide is found.
Ｄ 発明が解決しようとする問題点 ところが、受信チヤンネルの放送波の信号レベルに比
して隣接チヤンネルの放送波の信号レベルが極めて大き
い場合や、地上マイクロ波回線の妨害を受けた場合な
ど、アンテナの偏波面と受信チヤンネルの放送波の偏波
面とが一致した位置を確認することが困難な場合があ
る。D The problem to be solved by the invention is that the antenna is used when the signal level of the broadcast wave of the adjacent channel is extremely higher than the signal level of the broadcast wave of the receiving channel, or when the terrestrial microwave circuit is disturbed. It may be difficult to confirm the position where the plane of polarization of and the plane of polarization of the broadcast wave of the reception channel match.
すなわち、第５図に示すように、隣接チヤンネルCH3
の信号レベルL2が、極めて大きな場合は、受信チヤンネ
ルCH2の放送波及び隣接チヤンネルCH3の放送波とが重な
り合う帯域において、当該隣接チヤンネルCH3の放送波
の信号成分のレベルが大きくなり、AGC電圧の変化が隣
接チヤンネルCH3の放送波の信号レベルの影響を受ける
ようになる。That is, as shown in FIG. 5, the adjacent channel CH3
When the signal level L2 of is extremely large, the level of the signal component of the broadcast wave of the adjacent channel CH3 becomes large in the band where the broadcast wave of the reception channel CH2 and the broadcast wave of the adjacent channel CH3 overlap, and the AGC voltage changes. Will be affected by the signal level of the broadcast wave of the adjacent channel CH3.
その結果アンテナの偏波面の位置変化に対してAGC電
圧が一様に変化しなくなり、AGC電圧が最大値になるア
ンテナの偏波面の位置と、受信チヤンネルの放送波の偏
波面にアンテナの偏波面が一致する位置とが異なるよう
になる。As a result, the AGC voltage does not change uniformly with respect to the position change of the polarization plane of the antenna, and the position of the polarization plane of the antenna where the AGC voltage becomes the maximum value and the polarization plane of the antenna on the polarization plane of the broadcast wave of the reception channel. Will be different from the matching position.
さらに米国においては、第３図に示すように各チヤン
ネルの中心周波数から10〔MHz〕だけずれた位置に地上
マイクロ波回線の帯域SMが割り当てられており、このよ
うな信号波がアンテナに到来する場合においても、アン
テナの偏波面と受信チヤンネルの放送波の偏波面とが一
致した位置を確認することが困難になる。Further, in the United States, as shown in FIG. 3, the band SM of the terrestrial microwave circuit is allocated at a position shifted by 10 [MHz] from the center frequency of each channel, and such a signal wave arrives at the antenna. Even in such a case, it becomes difficult to confirm the position where the polarization plane of the antenna and the polarization plane of the broadcast wave of the reception channel match.
この結果、アンテナ設置時のアンテナの調整作業の手
間が煩雑になると共に、調整時間が長大になる問題があ
つた。As a result, there is a problem that the work of adjusting the antenna when installing the antenna becomes complicated and the adjustment time becomes long.
本発明は以上の問題点を考慮してなされたもので、隣
接チヤンネルの放送波の影響や地上マイクロ波回線の妨
害を受けることなく、アンテナの偏波面と受信チヤンネ
ルの放送波の偏波面とが一致する位置を容易に確認する
ことができる衛星放送受信機を提案しようとするもので
ある。The present invention has been made in view of the above problems, and the polarization plane of the antenna and the polarization plane of the broadcast wave of the reception channel are not affected by the influence of the broadcast waves of the adjacent channels or the interference of the terrestrial microwave circuit. It aims to propose a satellite broadcast receiver that can easily confirm the matching position.
Ｅ 問題点を解決するための手段 かかる問題点を解決するために、本発明においては、
受信波S1の１チヤンネル分CH2の帯域幅を有する第１の
通過帯域幅B1とその第１の通過帯域幅B1より狭い第２の
通過帯域幅B2とを切り換える通過帯域切換手段６、７、
９と、その通過帯域切換手段６、７、９を介して得られ
る受信波S1の信号レベルを検出する検出手段10、11と、
その検出手段10、11で検出された受信波S1の信号レベル
を表示する表示手段13とを設けるようにする。E Means for Solving Problems In order to solve such problems, in the present invention,
Pass band switching means 6, 7 for switching between a first pass bandwidth B1 having a bandwidth of one channel CH2 of the received wave S1 and a second pass bandwidth B2 narrower than the first pass bandwidth B1.
9 and detection means 10 and 11 for detecting the signal level of the received wave S1 obtained through the pass band switching means 6, 7 and 9.
Display means 13 for displaying the signal level of the received wave S1 detected by the detection means 10, 11 is provided.
Ｆ 作用 アンテナの偏波面の調整の際に、通過帯域幅を狭い通
過帯域幅B2に切り換えることにより、隣接チヤンネルの
放送波及び地上マイクロ波回線の信号を通過帯域B2外に
設定することができ、受信波S1の信号レベルのみを検出
すると共に表示し得る。これによりユーザは隣接チヤン
ネルの放送波の影響や地上マイクロ波回線の妨害の無い
受信波S1の信号レベルの表示を見ながら、確実かつ容易
にアンテナの偏波面を調整できる。F-action When adjusting the polarization plane of the antenna, by switching the pass band width to the narrow pass band width B2, it is possible to set the broadcast wave of the adjacent channel and the signal of the terrestrial microwave circuit outside the pass band B2. Only the signal level of the received wave S1 can be detected and displayed. This allows the user to adjust the polarization plane of the antenna reliably and easily while observing the signal level display of the received wave S1 without the influence of the broadcast wave of the adjacent channel or the interference of the terrestrial microwave circuit.
Ｇ 実施例 以下図面と共に本発明の一実施例について詳述する。G Embodiment One embodiment of the present invention will be described in detail below with reference to the drawings.
第１図において、１は全体として衛星放送受信機を示
し、ダブルスーパーヘテロダイン構成でなる。In FIG. 1, reference numeral 1 denotes a satellite broadcast receiver as a whole, which has a double superheterodyne configuration.
すなわち、アンテナ及びダウンコンバータ（図示せ
ず）を介して得られた例えば周波数950〔MHz〕〜1450
〔MHz〕の帯域に周波数変換された放送波信号S1を第１
中間周波増幅回路２に受けて増幅した後、混合回路３に
出力する。That is, for example, frequencies 950 [MHz] to 1450 obtained via an antenna and a down converter (not shown).
First, the broadcast wave signal S1 whose frequency is converted to the [MHz] band
After being received by the intermediate frequency amplifier circuit 2 and amplified, it is output to the mixing circuit 3.
混合回路３は、局部発振回路４の局部発振出力S2を受
け、周波数変換した所定の放送波信号S3を第２中間周波
増幅回路５を介してバンドパスフイルタ７及び９と共に
通過帯域切換手段を構成する選択回路６に送出する。The mixing circuit 3 receives the local oscillation output S2 of the local oscillation circuit 4, and forms a frequency band-converted predetermined broadcast wave signal S3 through a second intermediate frequency amplification circuit 5 together with bandpass filters 7 and 9 to form pass band switching means. To the selection circuit 6.
選択回路６は選択信号SHに応動して切換動作し、通常
の受信状態で選択される選択出力端6aを有し、この出力
端6aを、第２図に示すように、放送波の１チヤンネル分
の通過帯域幅B1（例えば30〔MHz〕）を有するバンドパ
スフイルタ７に接続する。The selection circuit 6 performs a switching operation in response to the selection signal SH, and has a selection output end 6a which is selected in a normal receiving state. This output end 6a is, as shown in FIG. It is connected to a bandpass filter 7 having a minute passband width B1 (for example, 30 [MHz]).
従って通常の受信状態においてバンドパスフイルタ７
の出力端には、隣接チヤンネルCH1及びCH3との重なり合
う帯域を含む１チヤンネルCH2分の帯域制限を受けた放
送波信号S4が得られる。このときアンテナの偏波面がこ
の１チヤンネル分の放送波の偏波面と一致していると
き、たとえ隣接チヤンネルの信号レベルが極端に大きく
なつても混信のない中間周波出力信号S4を得ることがで
きる。Therefore, in the normal reception state, the bandpass filter 7
A broadcast wave signal S4 that is band-limited to one channel CH2 including a band overlapping with the adjacent channels CH1 and CH3 is obtained at the output terminal of. At this time, when the plane of polarization of the antenna coincides with the plane of polarization of the broadcast wave for one channel, it is possible to obtain the intermediate frequency output signal S4 without interference even if the signal level of the adjacent channel becomes extremely large. .
これに対して選択回路６は衛星放送受信機がアンテナ
調整モードになると選択出力端6bを選択して選択出力を
バンドパスフイルタ９に与える。On the other hand, the selection circuit 6 selects the selection output terminal 6b when the satellite broadcast receiver is in the antenna adjustment mode, and gives the selection output to the bandpass filter 9.
バンドパスフイルタ９は、第３図に示すように、その
通過帯域幅B2がバンドパスフイルタ７と比較して、隣接
チヤンネルとの重なり合う帯域部分を含まなくなるよう
に狭い通過帯域幅B2（例えば15〔MHz〕）に選定されて
いる。As shown in FIG. 3, the band pass filter 9 has a narrow pass band width B2 (for example, 15 [ MHz]).
従つて、アンテナ調整モードにおいて、バンドパスフ
イルタ９の出力端には、アンテナの偏波面と受信チヤン
ネルの放送波の偏波面とが一致しても、しなくても、受
信チヤンネルの放送波信号S4だけが得られることとな
る。Therefore, in the antenna adjustment mode, the output end of the bandpass filter 9 may or may not match the polarization plane of the antenna with the polarization plane of the broadcast wave of the reception channel, and the broadcast wave signal S4 of the reception channel may be obtained. Only will be obtained.
因に地上マイクロ波回線SMの周波数帯域は、当該受信
チヤンネルの中心周波数から10〔MHz〕離調したバンド
パスフイルタ９の通過帯域外の位置にあるから、当該受
信チヤンネルに妨害を与えなくなる。Because the frequency band of the terrestrial microwave circuit SM is located outside the pass band of the band pass filter 9 detuned by 10 [MHz] from the center frequency of the receiving channel, it does not interfere with the receiving channel.
バンドパスフイルタ７及び９の出力は表示装置13及び
アナログ／デイジタル変換回路11と共に受信波の信号レ
ベルを検出する検出手段を構成するAGC回路10に出力さ
れる。AGC回路10は、中間周波数信号S4の信号レベルに
応じたAGC電圧を帰還回路（図示せず）に出力すると同
時に、例えば８ビツトのアナログ／デイジタル変換回路
11にAGC電圧を出力する。さらにAGC回路10は検波回路12
に持続され、検波回路12において得られるチヤンネル信
号S5がビデオ回路及びオーデイオ回路（図示せず）に出
力される。The outputs of the band pass filters 7 and 9 are output to the display device 13 and the analog / digital conversion circuit 11 as well as to the AGC circuit 10 which constitutes a detection means for detecting the signal level of the received wave. The AGC circuit 10 outputs an AGC voltage corresponding to the signal level of the intermediate frequency signal S4 to a feedback circuit (not shown), and at the same time, for example, an 8-bit analog / digital conversion circuit.
The AGC voltage is output to 11. Furthermore, the AGC circuit 10 is a detection circuit 12
, And the channel signal S5 obtained in the detection circuit 12 is output to the video circuit and the audio circuit (not shown).
同時にアナログ／デイジタル変換回路11の出力は例え
ばCRT（陰極線管）デイスプレイでなる表示装置13に出
力され、衛星放送受信機１がアンテナ調整モードになる
とAGC電圧レベルが表示装置13のCRTデイスプレイ上に表
示されるようになされている。At the same time, the output of the analog / digital conversion circuit 11 is output to the display device 13 which is, for example, a CRT (cathode ray tube) display, and when the satellite broadcast receiver 1 is in the antenna adjustment mode, the AGC voltage level is displayed on the CRT display of the display device 13. It is designed to be done.
因に当該CRTデイスプレイは、通常の受信動作におい
は受信チヤンネルの放送番組を表示するようになされて
いる。Incidentally, the CRT display is designed to display the broadcast program of the reception channel in the normal reception operation.
以上の構成において、アンテナ設置時に衛星放送受信
機１をアンテナ調整モードに設定すると、選択回路６は
バンドパスフイルタ９を選択する。In the above configuration, when the satellite broadcast receiver 1 is set to the antenna adjustment mode when the antenna is installed, the selection circuit 6 selects the bandpass filter 9.
このとき地上マイクロ波回線及び隣接チヤンネルの放
送波の信号は、バンドパスフイルタ９の通過帯域外にな
るので、地上マイクロ波回線の妨害及び隣接チヤンネル
の放送波の信号レベルの影響を受けずに、受信チヤンネ
ルの放送波の信号レベルを検出することができる。At this time, the signals of the broadcast waves of the terrestrial microwave circuit and the adjacent channel are out of the pass band of the band pass filter 9, so that they are not affected by the interference of the terrestrial microwave circuit and the signal level of the broadcast wave of the adjacent channel, The signal level of the broadcast wave of the reception channel can be detected.
当該受信チヤンネルの信号レベルは表示装置13に表示
され、かくしてこの表示値が最大値になるようにアンテ
ナの偏波面を調整することにより、アンテナの偏波面を
受信チヤンネルの放送波の偏波面の位置に設定すること
ができる。The signal level of the reception channel is displayed on the display device 13. Thus, by adjusting the polarization plane of the antenna so that this display value becomes the maximum value, the polarization plane of the antenna is positioned on the polarization plane of the broadcast wave of the reception channel. Can be set to.
このアンテナの調整が完了した後、通常の受信状態に
なると、衛星放送受信機１は通常の通過帯域幅のバンド
パスフイルタ７が選択される。After the adjustment of the antenna is completed, in the normal reception state, the satellite broadcast receiver 1 selects the band pass filter 7 having the normal pass bandwidth.
かくしてアンテナの偏波面を所望の放送波の偏波面に
一致させて通常の受信状態の通過帯域幅で受信すること
により、隣接チヤンネルの混信を受けることのない良好
な受信状態を維持できるようになる。Thus, by matching the polarization plane of the antenna with the polarization plane of the desired broadcast wave and receiving in the pass band width of the normal reception state, it becomes possible to maintain a good reception state without receiving interference from adjacent channels. .
以上の構成によればアンテナ調整時に隣接チヤンネル
の放送波の信号レベルの影響及び地上マイクロ波回線の
妨害を受けずに、所望の受信チヤンネルの放送波の信号
レベルだけを検出することができ、かくして確実に、か
つ容易に、アンテナの偏波面を調整することができる。According to the above configuration, it is possible to detect only the signal level of the broadcast wave of the desired reception channel without being affected by the signal level of the broadcast wave of the adjacent channel and the interference of the terrestrial microwave circuit when adjusting the antenna. The polarization plane of the antenna can be adjusted reliably and easily.
なお上述の実施例おいては、アンテナ調整用のバンド
パスフイルタ９の通過帯域幅を15〔MHz〕に選定した場
合について述べたが、通過帯域幅はこれに限らず、要は
地上マイクロ波回線の妨害及び隣接チヤンネルの放送波
の影響を排除できる通過帯域幅、又は実用上この影響の
少ない通過帯域幅に選定すれば良い。In the above embodiment, the case where the pass band width of the band pass filter 9 for antenna adjustment is selected to be 15 [MHz] has been described, but the pass band width is not limited to this, and the point is that the terrestrial microwave circuit is used. It is sufficient to select a pass band width that can eliminate the influence of the above-mentioned interference and the broadcast wave of the adjacent channel, or a pass band width that has practically little effect on this.
また上述の実施例においては、通過帯域切換手段とし
て通過帯域幅の異なる２個のバンドパスフイルタを設け
てこれを切り換える場合について述べたが、本発明はこ
に限らず、１個のバンドパスフイルタの通過帯域幅を可
変するように構成した場合や、例えばアンテナの調整モ
ードの際に地上マイクロ波回線の信号の帯域にトラツプ
を設けるように構成した場合にも適用し得る。Further, in the above-described embodiment, the case where two band pass filters having different pass band widths are provided as the pass band switching means and the band pass filters are switched is described. However, the present invention is not limited to this, and one band pass filter is used. The present invention can also be applied to a case where the pass band width of the above is configured to be variable, or a case where a trap is provided to the band of the signal of the terrestrial microwave line in the adjustment mode of the antenna, for example.
さらに上述の実施例においては、AGC電圧を用いてバ
ンドパスフイルタを介して得られる放送波の信号レベル
を検出する場合について述べたが、本発明はこれに限ら
ず、別途信号レベルの検出手段を設けるようにしても良
く、また当該検出結果の表示も他の表示手段を用いるよ
うにしても良い。Furthermore, in the above-described embodiment, the case where the signal level of the broadcast wave obtained via the bandpass filter is detected by using the AGC voltage has been described, but the present invention is not limited to this, and a signal level detection means is separately provided. The detection result may be displayed by using other display means.
Ｈ 発明の効果 以上のように本発明によれば、隣接チヤンネルの放送
波の影響及び地上マイクロ波回線の妨害を受けることな
く、所望の受信チヤンネルの放送波の信号レベルだけを
検出することができるので、確実にかつ容易に、アンテ
ナの偏波面の調整を行うことができる。H Effect of the Invention As described above, according to the present invention, it is possible to detect only the signal level of the broadcast wave of the desired reception channel without being affected by the broadcast waves of the adjacent channels and the interference of the terrestrial microwave circuit. Therefore, the polarization plane of the antenna can be adjusted reliably and easily.
第１図は本発明による衛星放送受信機の一実施例を示す
ブロック図、第２図及び第３図はそのバンドパスフイル
タの特性を示す特性曲線図、第４図はＣバンドの周波数
割当てを示す略線図、第５図は従来技術の説明に供する
略線図である。 １……衛星放送受信機、６……選択回路、７、９……バ
ンドパスフイルタ、10……AGC回路、11……アナログ／
デイジタル変換回路、12……表示装置。FIG. 1 is a block diagram showing an embodiment of a satellite broadcasting receiver according to the present invention, FIGS. 2 and 3 are characteristic curve diagrams showing the characteristics of the band pass filter, and FIG. 4 is a frequency allocation of C band. The schematic diagram shown in FIG. 5 is a schematic diagram for explaining the conventional technique. 1 ... Satellite broadcast receiver, 6 ... Selection circuit, 7,9 ... Band pass filter, 10 ... AGC circuit, 11 ... Analog /
Digital conversion circuit, 12 ... Display device.
Claims (1)
第１の通過帯域幅と当該第１の通過帯域幅より狭い第２
の通過帯域幅とを切り換える通過帯域切換手段と、 当該通過帯域切換手段を介して得られる受信波の信号レ
ベルを検出する検出手段と、 当該検出手段で検出された上記受信波の上記信号レベル
を表示する表示手段とを具えることを特徴とする衛星放
送受信機。1. A first pass bandwidth having a bandwidth of one channel of a received wave and a second pass bandwidth narrower than the first pass bandwidth.
The pass band switching means for switching the pass band width of the received wave, the detecting means for detecting the signal level of the received wave obtained through the pass band switching means, and the signal level of the received wave detected by the detecting means. A satellite broadcast receiver comprising display means for displaying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61165416A JP2508461B2 (en) | 1986-07-14 | 1986-07-14 | Satellite receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61165416A JP2508461B2 (en) | 1986-07-14 | 1986-07-14 | Satellite receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6320985A JPS6320985A (en) | 1988-01-28 |
| JP2508461B2 true JP2508461B2 (en) | 1996-06-19 |
Family
ID=15812000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61165416A Expired - Fee Related JP2508461B2 (en) | 1986-07-14 | 1986-07-14 | Satellite receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2508461B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0289485A (en) * | 1988-09-27 | 1990-03-29 | Fujitsu General Ltd | Satellite broadcast receiver |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6277786A (en) * | 1985-10-01 | 1987-04-09 | Matsushita Electric Ind Co Ltd | Polarizer control circuit for satellite broadcasting receiver |
| JPS62116093A (en) * | 1985-11-15 | 1987-05-27 | Matsushita Electric Ind Co Ltd | Controller for polarizer |
-
1986
- 1986-07-14 JP JP61165416A patent/JP2508461B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6277786A (en) * | 1985-10-01 | 1987-04-09 | Matsushita Electric Ind Co Ltd | Polarizer control circuit for satellite broadcasting receiver |
| JPS62116093A (en) * | 1985-11-15 | 1987-05-27 | Matsushita Electric Ind Co Ltd | Controller for polarizer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6320985A (en) | 1988-01-28 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |