KR920008264Y1 - Auto-gain level indicate circuit for satellite broadcasting tuner - Google Patents

Auto-gain level indicate circuit for satellite broadcasting tuner Download PDF

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KR920008264Y1
KR920008264Y1 KR2019900012668U KR900012668U KR920008264Y1 KR 920008264 Y1 KR920008264 Y1 KR 920008264Y1 KR 2019900012668 U KR2019900012668 U KR 2019900012668U KR 900012668 U KR900012668 U KR 900012668U KR 920008264 Y1 KR920008264 Y1 KR 920008264Y1
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microcomputer
satellite broadcasting
automatic gain
tuner
transistor
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KR2019900012668U
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KR920005547U (en
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백운길
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주식회사 금성사
이헌조
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/90—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for satellite broadcast receiving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/52—Automatic gain control

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

내용 없음.No content.

Description

위성방송튜너의 자동이득제어레벨 표시회로Automatic Gain Control Level Display Circuit of Satellite Broadcast Tuner

제1도는 종래 위성방송 티브이의 수신시스템 구성도.1 is a block diagram of a conventional satellite broadcasting TV receiving system.

제2도는 본 고안에 따른 위성방송 티브이 수신시스템의 자동이득제어레벨 표시회로도.2 is an automatic gain control level display circuit diagram of a satellite TV receiving system according to the present invention.

제3도는 본 고안에 따른 제어흐름도.3 is a control flow chart according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

20 : 스위칭부 Q1: 엔피트랜지스터20: switching unit Q 1 : n-pit transistor

Q2: 피엔피트랜지스터 P1: 스위칭제어단자Q 2 : PNP transistor P 1 : switching control terminal

P2:아날로그/디지탈변환 입력단자 C1: 자동이득제어레벨 출력단자P 2 : Analog / digital conversion input terminal C 1 : Automatic gain control level output terminal

T1: 자동동조튜닝전압 출력단자T 1 : Automatic tuning tuning voltage output terminal

본 고안은 직접 위성방송(DBS)시스템에서 안테나 조정시 위성방송(BS)튜너의 자동이득제어(AGC)레벨표시회로에 관한 것으로, 특히 마이컴을 통해 자동이득제어베렐 변화를 읽어들여 온스크린 표시하도록 함으로서, 안테나 조정시 편리하도록 하기 위한 위성방송튜너의 자동이득제어레벨 표시회로에 관한 것이다.The present invention relates to an automatic gain control (AGC) level display circuit of a satellite tuner (BS) tuner when adjusting an antenna in a direct satellite broadcasting (DBS) system. In particular, an automatic gain control bevel change is read through a microcomputer to display an on-screen display. The present invention relates to an automatic gain control level display circuit of a satellite broadcast tuner for convenient antenna adjustment.

제1도는 종래의 위성방송 티브이의 수신시스템 구성도로서, 이에 도시된 바와같이 리모콘(1)의 명령를 받는 마이컴(2)의 제어에 따라 위성방송튜너(3)가 위성방송수신을 하여 위성방송중간주파(iF)처리부(4)를 통해 위성방송영상신호와 위성방송음성신호를 검파한 후 위상방송영상신호처리부(5)를 통해서는 위성방송영상신호를 출력하고, 위성방송음성신호처리부(6)를 통해서는 위성방송음성신호를 출력하며, 상기 마이컴(2)의 제어를받는 티브이튜너(7)가 위성방송이 아닌 일반 티브이방송신호를 수신하여 티브이중간주파(iF)처리부(8)를 통해 티브이영상신호 및 티브이음성신호를 검파한후 티브이영상신호처리부(9)를 통해서는 티브이영상신호를 출력하고, 티브이음성신호처리부(10)를 통해서는 티브이음성신호를 출력하도록 한다.FIG. 1 is a block diagram of a conventional satellite broadcasting TV receiving system. As shown therein, the satellite broadcasting tuner 3 receives satellite broadcasting under the control of the microcomputer 2 receiving a command of the remote controller 1, and thus, the satellite broadcasting middle. After detecting the satellite broadcast video signal and the satellite broadcast audio signal through the frequency (iF) processor 4, the satellite broadcast video signal is output through the phase broadcast video signal processor 5 and the satellite broadcast audio signal processor 6 The TV tuner 7 outputs a satellite broadcast voice signal, and the TV tuner 7 under the control of the microcomputer 2 receives a general TV broadcast signal instead of a satellite broadcast to receive a TV through an iF processor 8. After detecting the video signal and the TV audio signal, the TV video signal processor 9 outputs the TV video signal, and the TV audio signal processor 10 outputs the TV audio signal.

여기서, 마이컴(2)은 위성방송튜너(3) 및 티브이튜너(7)를 제어하여 자동이득제어(AGC)를 통해 튜닝하도록 함과 아울러 위상방송음성신호처리부(6)를 제어하고, 티브이영상신호처리부(9)로 부터 티브이 채널전환시 자동동조튜닝(AFT)전압을 인식하여 동작제어하도록 한다. 이때 위상방송안테나(파라볼라 안테나)를 조정할 경우 상기 위성방송튜너(3)의 튜닝제어인 자동이득제어(AGC)레벨을 전압메타(11)를 통해 검지하여 전압이 최고가 되도록 위성방송안테나의 방향을 조정하도록 한다.Here, the microcomputer 2 controls the satellite broadcast tuner 3 and the TV tuner 7 to tune through an automatic gain control (AGC), and also controls the phase broadcast audio signal processor 6 and the TV video signal. Recognizes automatic tuning tuning (AFT) voltage during TV channel switching from processor 9 to control operation. At this time, when adjusting the phase broadcasting antenna (parabola antenna), the automatic gain control (AGC) level, which is the tuning control of the satellite broadcasting tuner 3, is detected through the voltage meta 11 to adjust the direction of the satellite broadcasting antenna so that the voltage becomes the highest. Do it.

이와같이 위성방송안테나의 방향조정시 별도의 전압메타를 이용하여 위성방송튜너의 자동이득제어레벨을 검지하면서 위성방송안테나의 방향을 조정하게 되므로 사용상의 불편한 문제점이 있었다.As described above, when the satellite broadcasting antenna is adjusted in direction, the satellite broadcasting antenna is adjusted while detecting the automatic gain control level of the satellite broadcasting tuner using a separate voltage meter, which causes inconvenience in use.

본 고안은 이와같은 종래의 문제점을 감안하여, 위성방송튜너의 자동이득제어레벨을 마이컴에서 검지하여 온스크린표시해 줄 수 있도록 한 위성방송튜너의 자동이득제어레벨 표시회로를 안출한 것으로, 이를 첨부한도면을 참조하여 상세히 설명하면 다음과 같다.In view of the above problems, the present invention devised an automatic gain control level display circuit of a satellite broadcast tuner which detects the automatic gain control level of the satellite broadcast tuner on a microcomputer and displays it on-screen. When described in detail with reference to the drawings as follows.

제2도는 본 고안에 따른 위성방송튜너의 자동이득레벨 표시회로 구성도로서, 이에 도시한 바와같이 리모콘(1)의 명령을 받는 마이컴(2)의 제어에 따라 위성방송신호는 위성방송튜너(3)를 통해 수신하여 위상방송중간주파처리부(4)를 통한 후 위성방송영상신호처리부(5)를 통해서는 위성방송영상신호를 출력하고, 위성방송음성신호처리부(6)를 통해서는 위성방송음성신호를 출력하며, 티브이방송신호는 티브이튜너(7)를 통해수신하여 티브이중간주파처리부(8)를 통한후 티브이영상신호처리부(9)를 통해서는 브라운관(CPT)에 티브이영상신호를 출력하고, 티브이음성신호처리부(10)를 통해서는 티브이음성신호를 출력하도록 하는 위성방송티브의 수신시스템에 있어서, 상기 마이컴(2)의 스위칭제어단자(P1)를 저항(R2)을 통해 엔피트랜지스터(Q1)의 베이스 및 피엔피트랜지스터(Q2)의 베이스는 공통접속하고, 상기 엔피트랜지스터(Q1)의 콜렉터는 저항(R1)을 통해 상기 위성방송튜너(3)의 자동이득제어레벨출력단자(C1)에 접속하며, 상기 피엔피트랜지스터(Q2)의 에미터는 저항(R3)을 통해 상기 티브이영상신호처리부(9)의 자동동조튜닝전압출력단자(T1)에 접속하고, 상기 엔피트랜지스터(Q1)의 에미터 및 상기 피엔피트랜지스터(Q2)의 콜렉터를 상기 마이컴(2)의 아날로그/디지탈변환입력단자(P2)에 공통접속하여 스위칭부(20)를 구성하고, 상기 마이컴(2)에서 상기 스위칭부(20)를 통해 입력받는 상기 위성방송튜너(3)의 자동이득제어레벨을 상기 티브이영상신호처리부(9)를 통해 온스크린표시(OSD)하도록 구성한다.2 is a block diagram of the automatic gain level display circuit of the satellite broadcast tuner according to the present invention, and as shown in FIG. 2, the satellite broadcast signal is controlled by the microcomputer 2 receiving a command from the remote controller 1. After receiving through the phase broadcasting intermediate frequency processing unit 4 through the satellite broadcast video signal processing unit 5 to output the satellite broadcast video signal, the satellite broadcast sound signal processing unit 6 through the satellite broadcast sound signal The TV broadcast signal is received through the TV tuner (7), and then through the TV intermediate frequency processing unit (8), and then through the TV video signal processing unit (9) to output the TV video signal to the CRT. In the satellite broadcast receiving system for outputting a TV voice signal through the voice signal processor 10, the switching control terminal P 1 of the microcomputer 2 is connected through the resistor R 2 . the base of 1) Blood & P transistor (Q 2) of the base are connected in common, and wherein the & P transistor (Q 1) of the collector resistor (R 1), an automatic gain control level of the output terminal (C 1) of the satellite broadcasting tuner 3 via a The emitter of the PNP transistor Q 2 is connected to the automatic tuning tuning voltage output terminal T 1 of the TV image signal processor 9 through a resistor R 3 , and the N transistor Q 1. ) emitter and the P & P by common connection to the collector of the transistor (Q 2) to the analog / digital conversion input terminal (P 2) of the microcomputer (2) constituting the switching section 20, and the microcomputer (2) of The automatic gain control level of the satellite broadcast tuner 3 received through the switching unit 20 is configured to display on-screen display (OSD) through the TV image signal processing unit 9.

이와같이 구성한 본 고안의 작용 및 효과믈 설명하면 다음과 같다.Referring to the operation and effects of the present invention configured as described above are as follows.

마이컴(2)은 스위칭제어단자(P1)를 통해 스위칭부(20)를 제어하는 데, 위성방송조정모드에서는 고전위신호를 출력하고, 위성방송조정모드가 아닌 상황에서는 저전위신호를 출력하여 스위칭부(20)를 제어하게 된다.The microcomputer 2 controls the switching unit 20 through the switching control terminal P 1. The microcomputer 2 outputs a high potential signal in the satellite broadcasting adjustment mode, and outputs a low potential signal in the non-satellite broadcasting adjustment mode. The switching unit 20 is controlled.

이와같이 위성방송조정모드이어서 마이컴(2)의 스위칭제어단자(P1)에 고전위신호가 출력되며, 그 고전위신호는 저항(R3)를 통해 트랜지스터(Q1),(Q2)의 베이스에 인가되므로 엔피트랜지스터(Q1)는 도통되고 피엔퍼트랜지스터(Q2)는 차단된다. 따라서 이때 위성방송튜너(3)의 자동이득제어레벨출력단자(C1)에 출릭되는 자동이득제어레벨전압이 상기 엔피트랜지스터(Q1)를 통해 마이컴(2)의 아날로그/디지탈변환 입력단자(P2)에 입력된다. 이와같이 아날로그/디지탈변환 입력단자(P)에 입려된 자동이득제어레벨전압은 그 마이컴(2)의 아날로그/디지탈변환기에서 디지탈신호로 변환되어 그 마이컴(2)의 내부 버퍼에 저장되고, 이에 따라 그 마이컴(2)은 그 버퍼에 저장된 디지탈신호값을 소정주기로 읽어 그의 내부램에 저장시키게 된다.In this manner, in the satellite broadcasting adjustment mode, a high potential signal is output to the switching control terminal P 1 of the microcomputer 2, and the high potential signal is transmitted to the base of the transistors Q 1 and Q 2 through the resistor R 3 . Entropy transistor Q 1 is turned on and PNP transistor Q 2 is blocked because it is applied to. Therefore, at this time, the automatic gain control level voltage, which is derived from the automatic gain control level output terminal C 1 of the satellite broadcast tuner 3, is input through the analog / digital conversion input terminal P of the microcomputer 2 through the N-transistor Q 1 . 2 ) is entered. As such, the automatic gain control level voltage applied to the analog / digital conversion input terminal P is converted into a digital signal by the analog / digital converter of the microcomputer 2 and stored in the internal buffer of the microcomputer 2, thereby The microcomputer 2 reads the digital signal value stored in the buffer at predetermined cycles and stores it in its internal RAM.

이때 자동이득제어레벨 온스크린표시모드이면, 그 마이컴(2)은 상기와 같이 램에 기억시킨 디지탈신호값을읽고, 이 값을 온스크린 묘시할 바(Bar)의 갯수로 환산하고, 이 환산된 바갯수의 데이타를 온스크린표시용버퍼에 기억시키고, 바의 색깔정보 및 표시위치의 수직 및 수평동기신호 데이타를 기억시킨다. 이후 상기 기억된 수직 및 수평동기신호 데이타에 따른 표시위치에서 상기 온스크린표시용 버퍼에 기억된 바 갯수의 데이타를 읽고, 그 바 갯수의 데이타에 의해 문자데이타 롬으로부터 바 발생 데이타를 읽고, 그 바 발생 데이타와 상기기억된 바의 색깔정보 데이타를 티브이영상신호처리부(9)로 출력함으로써 브라운관(CPT)에 소정갯수의 바가 표시되어 상기 자동이득제어레벨을 나타내게 된다.At this time, in the automatic gain control level on-screen display mode, the microcomputer 2 reads the digital signal value stored in the RAM as described above, converts this value into the number of bars to be drawn on-screen, and converts the converted The number of bars is stored in the on-screen display buffer, and the color information of the bar and the vertical and horizontal synchronous signal data of the display position are stored. Thereafter, the number of bars stored in the on-screen display buffer is read at the display position according to the stored vertical and horizontal synchronization signal data, and the bar generation data is read from the character data ROM by the number of bars. By outputting the generated data and the color information data of the stored bars to the TV image signal processor 9, a predetermined number of bars are displayed on the CPT to indicate the automatic gain control level.

그리고, 상기와 같은 과정을 마이컴(2)에서 소정주기로 반복함으로써 연속적으로 변화되는 자동이득제어레벨을 소정주기로 연속하여 바의 갯수로 온스크린 표시할 수 있게 된다.And, by repeating the above process in a predetermined period in the microcomputer 2, the automatic gain control level that is continuously changed can be displayed on-screen by the number of bars continuously in a predetermined period.

한편 위성방송조정모드가 아니어서 마이컴(2)의 스위칭제어단자(P1)에 저진위신호가 출력되면, 그 저진위신호에 의해 스위칭부(20)의 엔피트랜지스터(Q1)는 오프되고, 피엔피트랜지스터(Q1)는 도통된다.On the other hand, when the low-degree signal is output to the switching control terminal (P 1 ) of the microcomputer (2) is not in the satellite broadcast adjustment mode, the low-frequency signal, the pit transistor Q 1 of the switching unit 20 is turned off, The PNP transistor Q 1 is turned on.

따라서, 이때 티브이영상신호 처리부(9)의 자동동조튜닝전압 출력단자(T1) 에 출력되는 자동동조튜닝전압이 그 피엔피트랜지스터(Q2)를 통해 마이컴(2)은 그 아날로그/디지탈변환 입력단자(R2)에 입력되고, 이에 따라 마이컴(2)는 그 아날로그/디지탈변환 입력단자(R2)에 입력되는 자동동조튜닝전압에 의해 종래와 동일한 제어를 수행하게 된다.Therefore, at this time, the auto-tuning voltage outputted to the auto-tuning voltage output terminal T 1 of the TV image signal processor 9 is inputted through the P / P transistor Q 2 and the microcomputer 2 inputs its analog / digital conversion input. The microcomputer 2 is input to the terminal R 2 , and accordingly, the microcomputer 2 performs the same control as the conventional tuning by the automatic tuning tuning voltage input to the analog / digital conversion input terminal R 2 .

제3도는 상기에서 설명한 마이컴(2)의 제어과정을 개략적으로 보인 흐름도로서, 리모콘(1)을 통해 마이컴(2)에 자동이득제어키(AGC)입력이 되면, 현재 자동이득제어레벨 온스크린표시모드인지를 판별한다. 이는 자동이득제어키가 토글링 작용으로 동작/헤제모드를 제어하기 위함이다. 자동이득제어레벨 온스크린표시모드가 아니면, 마이컴(2)은 그의 스위칭제어단자(P1)에 저진위신호를 출력하여 티브이 자동동조튜닝(AFT)전압을 읽어들임과 아울러, 위상방송튜닝 자동이득제어(AGC)레벨 온스크린표시모드를 해제시킨후 리턴하고, 자동이득제어레벨 온스크린표시모드이면, 스위칭제어단자(P1)에 고전위신호를 출력함과 아울러 자동이득제어레벨 온스크린표시모드를 세트시킨후 입력단자(P2)를 통해 위성방숭튜너(3)의 자동이득제어레벨을 읽어들이고, 이 자동이득제어레벨값을 상기에서 설명한 바와같이 바(Bar)로 온스크린 표시제어를 한다. 한편,리모콘(1)을 통해 자동이득제어키 입력이 없으면, 자동이득제어레벨 온스크린표시모드인지를 판별하여 자동이득제어레벨 온스크린표시모드일 때, 상기와 같이 입력단자(P2)를 통해 위성방송튜너(3)의 자동이득제어레벨을 읽어들여 온스크린 표시제어를 한다.3 is a flowchart schematically illustrating the control process of the microcomputer 2 described above. When an automatic gain control key (AGC) is input to the microcomputer 2 through the remote controller 1, the current automatic gain control level on-screen display is shown. Determine if it is in mode. This is for the automatic gain control key to control the operation / release mode by the toggling action. Automatic gain control level When not in the on-screen display mode, the microcomputer 2 outputs a low-signal signal to its switching control terminal P 1 to read the TV auto-tuning tuning (AFT) voltage and automatically obtains phase broadcasting tuning. The control (AGC) level on-screen display mode is canceled and returned. In the automatic gain control level on-screen display mode, a high potential signal is output to the switching control terminal (P 1 ) and the automatic gain control level on-screen display mode is displayed. After setting, the automatic gain control level of the satellite music tuner 3 is read through the input terminal P 2 , and the automatic gain control level value is controlled by the bar as described above. . On the other hand, if there is no automatic gain control key input through the remote control (1), it is determined whether the automatic gain control level on-screen display mode, and when the automatic gain control level on-screen display mode, through the input terminal (P 2 ) as described above On-screen display control is performed by reading the automatic gain control level of the satellite broadcast tuner 3.

이상에서 설명한 바와같이 본 고안은 사용자가 위성방송안테나의 방향조정시 위성방송튜너의 자동이득제어레벨을 온스크린 표시함으로써 위성방송안테나의 방향조정를 손쉽게 할 수 있는 효과가 있게 된다.As described above, the present invention enables the user to easily adjust the direction of the satellite broadcasting antenna by displaying the automatic gain control level of the satellite broadcasting tuner on the screen when the user adjusts the satellite broadcasting antenna.

Claims (1)

마이컴(2)의 제어를 받아 위성방송튜너(3)에서 수신되는 위성방송신호가 위성방송중간주파처리부(4)를 통해 처리되어 위성방송영상신호처리부(5) 및 위성방송음성신호처리부(6)에 인가되고, 상기 마이컴(2)의 제어를 받아 티브이튜너(7)에서 수신되는 티브이방송신호가 티브이중간주파처리부(8)를 통해 처리되어 티브이영상신호처리부(9) 및 티브이음성신호처리부(10)에 인가되는 위상방송 티브이의 수신시스템에 있어서, 상기마이컴(2)의 스위칭제어단자(P1)를 저항(R2)을 통해 엔피트랜지스터(Q1) 및 피엔피트랜지스터(Q1)의 베이스에 공통접속하고, 상기 위상방송튜너(3)의 자동이득제어레벨출력단자(C1) 및 상기 티브이영상신호처리부(9)의 자동동조튜닝진압출력단자(T1)를 저항(R1),(R3)을 각기 통해 상기 트랜지스터(Q1)의 콜렉더 및 상기 트랜지스터(Q2)의 에미터에 각기 접속하고, 그 트랜지스터(Q1)의 에미터 및 트랜지스터(Q2)의 콜렉터를 상기마이컴(2)의 아날로그/디지탈변환입력단자(P2)에 접속하여, 상기 마이컴(2)에서 자동이득제어레벨 온스크린모드시에 상기 위성방송튜너(3)의 자동이득제어레벨을 상기 트랜지스터(Q1)를 통해 읽어들인후 그에 따른 온스크린표시데이타를 상기 티브이영상신호처리부(9)로 출력하여 표시하게 구성된것을 특징으로 하는 위성 방송튜너의 자동이득제어레벨 표시회로.Under the control of the microcomputer 2, the satellite broadcasting signal received from the satellite broadcasting tuner 3 is processed by the satellite broadcasting intermediate frequency processing section 4 so that the satellite broadcasting video signal processing section 5 and the satellite broadcasting sound signal processing section 6 are processed. The TV broadcast signal, which is applied to the TV and received by the TV tuner 7 under the control of the microcomputer 2, is processed through the TV intermediate frequency processing unit 8, thereby the TV image signal processing unit 9 and the TV audio signal processing unit 10. In the receiving system of a phase broadcast TV applied to the), the switching control terminal (P 1 ) of the microcomputer (2) through the resistor (R 2 ) of the base of the N-transistor (Q 1 ) and the P-P transistor (Q 1 ). a common connection, and an automatic gain control level of the output terminal (C 1) and said television image signal processor (9) for automatically tuning the tuning suppression output terminal (T 1) resistance (R 1) of the phase tuner 3, (R 3) if the call rekdeo and the transfection of the transistor (Q 1) through each Respectively connected to the emitter of the emitter (Q 2), and connected to the transistor analog / digital conversion input terminal (P 2) of the collector of the emitter and the transistor (Q 2) of the (Q 1), the microcomputer (2) The microcomputer 2 reads the automatic gain control level of the satellite broadcasting tuner 3 through the transistor Q 1 in the on-screen mode of the automatic gain control level, and displays the on-screen display data accordingly. An automatic gain control level display circuit of a satellite broadcast tuner, characterized in that it is output to the signal processor (9) for display.
KR2019900012668U 1990-08-22 1990-08-22 Auto-gain level indicate circuit for satellite broadcasting tuner KR920008264Y1 (en)

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KR920008264Y1 true KR920008264Y1 (en) 1992-11-14

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