KR870000987B1 - Walkie-talkie - Google Patents

Walkie-talkie Download PDF

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Publication number
KR870000987B1
KR870000987B1 KR1019830006208A KR830006208A KR870000987B1 KR 870000987 B1 KR870000987 B1 KR 870000987B1 KR 1019830006208 A KR1019830006208 A KR 1019830006208A KR 830006208 A KR830006208 A KR 830006208A KR 870000987 B1 KR870000987 B1 KR 870000987B1
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South Korea
Prior art keywords
switch
speaker
switching
terminal
antenna
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KR1019830006208A
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Korean (ko)
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KR850005186A (en
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이문형
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삼성전자공업 주식회사
정재은
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Priority to KR1019830006208A priority Critical patent/KR870000987B1/en
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    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/401—Circuits for selecting or indicating operating mode
    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/50—Telephonic communication in combination with video communication

Abstract

This invention is concerned with a device which is equipped with transmitting and receiving functions betwen transmitter and receiver. In general, transceiver (or walkie-talkie) can be used during walking without any visual image of the counter-part. This device which enables the user to see counter part can also make possible recognizing features simultaneously. Besides, it can be used for many other purposes. This device consists of transmitting /receiving select switch(1,2), lighting switch(4) on the upper part, semiconductor type-photographing part(a), monitor part(b) speaker to the front section.

Description

화면전송이 가능한 휴대용 송·수신장치Portable transmission and reception device capable of screen transmission

제1도는 본 발명의 개략 사시도.1 is a schematic perspective view of the present invention.

제2도는 본 발명의 회로구성 계통도.2 is a circuit diagram of the present invention.

제3도는 본 발명의 전환부(C , C')의 회로도.3 is a circuit diagram of switching units C and C 'of the present invention.

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

가 : 고체 촬상판과 보조 조명장치가 내장된 찰상부 나 : 수상용 박형모니터부A: Scratch unit with solid-state image board and auxiliary lighting device B: Thin monitor unit for water

다 : 송·수신 스피커 1, 2 : 송·수상 주파수 선택스위치C: Transmitter and receiver speaker 1, 2: Transmitter and receiver frequency selection switch

4 : 보조 조명스위치 5 : 슬라이드볼륨4: auxiliary light switch 5: slide volume

6 : 송·수화전환스위치 A : 수상계통부6: Transmit / receive switch A: Water system part

B : 송상계통부 C, C' : 전환부B: Transmission system C, C ': Switching unit

본 발명은 통상의 휴대용 송·수신장치에 간이 화상의 송·수상기능을 부여한 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus in which a conventional portable transmitter / receiver is given a function of transmitting and receiving a simple image.

일반적인 휴대용 송·수신장치(일명, 워키토키 또는 트랜시버라함)는 걸어 다니면서도 통화할 수 있는 소형무선 전화장치로서 업무용·아마추어무선용·자동차용등의 용도로 널리 활용되고 있다.A general portable transmitter and receiver (aka walkie talkie or transceiver) is a small wireless telephone device that can walk and talk while being widely used for business, amateur wireless, and automotive applications.

그러나, 이들은 여태까지는 단지 음성만을 상대방에게 전하는 송·수화전송기로서의 역할만하도록 설계되어 있으므로 상대방의 모습을 확인하려는 별도의 수단이 없어 불편한 점이 있다.However, since they are designed to serve only as a transmitting and receiving transmitter for transmitting only voice to the other party, there is no inconvenience in that there is no separate means for checking the appearance of the other party.

일예로, 수사관등 비밀임무 수행자가 상대방과 긴밀한 연락을 주고 받을시 수화자의 통신기기를 범법자에게 빼앗겼을 경우 수사 진행상 커다란 혼란이 야기될 것이고 이러한 사례를 방지하기 위해서는 통신자들이 서로 얼굴을 확인하면서 통신하는 것이 안전한 것이라고 볼때 통신기기에 송·수상기능을 부여하면 이러한 통신장비의 사용상의 신뢰성이나 이용가치를 현저히 중진시키는 것이라 기대되는 것이다.For example, if a secret task officer, such as an investigator, is in close contact with the other party and the receiver's communication device is taken from the offender, a great deal of confusion will occur. Considering that communication is safe, it is expected that if a communication device is given a transmission / reception function, it will significantly improve the reliability and value of use of such communication equipment.

본 발명은 이러한 점을 감안하여 안출한 것으로서 이를 상세히 설명하면 다음과 같다.The present invention has been made in view of this point and described in detail as follows.

송·수화스피커(다), 송·수화전환 스위치(6), 슬라이드볼륨(5), 전원 온·오프스위치(3), 안테나(7)를 배열 설치한 통상의 트랜시버에 있어서, 이에 송·수상주파수 선택스위치(1,2)와 보조 조명스위치(4)를 상면에 함께 배열 설치하고, 전면부엔 고체 촬상장치와 보조 조명장치가 내설된 반도체형 촬상부(가)와 수상용 박막 모니터부(나) 및 송·수화스피커(다)를 차례로 설치하며, 그 내면엔 중간 주파증폭기(14), 음성검파기(15), 음성증폭기(16)등으로 구성된 음성수신고계통과 영상검파기(10), 영상증폭기 및 칼라증폭기(11,12), 편향장치(13)등을 포함한 영상수 계통을 일체로한 수상계통부(A)와 기본파발진기(22), 영상증폭기(19), 영산변조기(18)등으로 구성된 송상계통과 음성증폭기(21), 음성변조기(20)등으로 구성된 음성송신계통 및 이를 혼합변조하는 혼합기(17)로 된 송상계통부(B)를 내장하되, 상기 수상계통부(A)내의 튜너(2)의 입력단과 음성증폭기(16)의 출력단을 송수화 전환부(C)(C')의 회로 접점(등가적) (a2)(a2')에 연결하고, 송상계통부(B)내의 혼합기(17)의 출력단과 음성증폭기(21)의 입력단을 각각 송수화전환부(C)(C')의 회로접점(등가적) (a1)(a1')에 연결하는 한편, 안테나(7)와 스피커(다)의 일단을 송수화 전화부(C )(C')의 회로접점(a3)(a3')에 연결하여 본 발명에 의한 장치를 구성한다.In a typical transceiver in which a transmission / reception speaker (C), a transmission / reception switch (6), a slide volume (5), a power on / off switch (3), and an antenna (7) are arranged in an array, The semiconductor image pickup unit (a) and the thin film monitor unit (a) having a solid state image pickup unit and an auxiliary illumination unit installed on the front side with the frequency selection switch (1, 2) and the auxiliary illumination switch (4) arranged on the upper surface together. B) and the transmitter / receiver speaker (C) are installed in this order, and the inner side of the receiver is composed of an intermediate frequency amplifier (14), a voice detector (15), a voice amplifier (16), an image detector (10), Water system unit (A), basic oscillator (22), image amplifier (19), Youngsan modulator (18), integrating the image water system including image amplifiers, color amplifiers (11, 12), deflector (13), etc. Audio transmission system composed of a transmission system and voice amplifier 21, a voice modulator 20, etc. and a mixer 17 for mixing and modulating them A built-in transmission system (B), but the input terminal of the tuner (2) and the output terminal of the voice amplifier 16 in the water system (A) of the circuit contact of the handset switching unit (C) (C ') (equivalent) Red) (a 2 ) (a 2 '), and the output terminal of the mixer 17 in the transmission system section B and the input terminal of the voice amplifier 21 are respectively circuits of the handset switching section C (C'). Circuit contact (a 3 ) (a) of one end of the antenna 7 and the speaker (c) while connecting to a contact (equivalent) (a 1 ) (a 1 ′) 3 ') to configure the device according to the invention.

제3도에는 상기한 송수화 전환부(C)(C')로서 각각 사용될 수 있는 전자 스위칭회로의 일례가 도시되어 있다. 제3도의 회로는 다이오드(D1, D2)상에 순방향 전류가 흐름으로써 게이트(GATE)되는 특성을 이용한 스위칭회로로서, 단자(ㅁ)는 제2도에 도시된 안테나(7) 또는 스피커(다)가 연결되는 접점(a3),(a3')에 해당하며, 단자( c)는 혼합기(17) 또는 음성증폭기(16)의 출력단과 연결되는 점점(a1)(a2')에 해당하고, 단자(ㄹ)는 튜너(2) 또는 음성증폭기(21)의 입력단과 연결되는 단자(a2)(a1')에 해당한다. 다시 말해서, 제3도의 회로로 제2도의 전환부(C)를 구성할때 단자(ㄷ)(ㄹ)(ㅁ)에는 각각 혼합기(17)의 출력, 튜너(2)의 입력, 안테나(7)의 일단이 접속되며, 제3도의 회로로 제2도의 전환부(C')를 구성할 때 단자(ㄷ)(ㄹ)(ㅁ)에는 각각 음성증폭기(16)의 출력 음성증폭기(21)의 입력, 스피커(다)의 일단에 접속된다.3 shows an example of an electronic switching circuit that can be used as the above-mentioned handset switching unit C (C '), respectively. The circuit of FIG. 3 is a switching circuit using the characteristic that the gate is gated by the flow of forward current on the diodes D 1 and D 2 , and the terminal ㅁ is an antenna 7 or a speaker ( C) corresponds to the contacts (a 3 ), (a 3 ′) to which the terminals (c) are connected (a 1 ) (a 2 ′) connected to the output terminal of the mixer 17 or the voice amplifier 16. The terminal (d) corresponds to the terminal (a 2 ) (a 1 ′) connected to the input terminal of the tuner 2 or the voice amplifier 21. In other words, when constructing the switching unit C of FIG. 2 with the circuit of FIG. 3, the terminals (c) (d) (ㅁ) are respectively output of the mixer 17, input of the tuner 2, and antenna 7 One end of is connected and the input of the audio amplifier 21 of the audio amplifier 16 is input to the terminals c. Is connected to one end of the speaker (C).

이들 송수화 전환부(C)(C')는 하나의 송수화 전화스위치(6)(제1도 참조)에 의해 연동되는 바, 이 송수화 전환스위치(6)의 스위칭 동작에 따른 전환부(C)(C')의 동작과정을 살펴 본다.These handset switching units C and C 'are interlocked by one handset telephone switch 6 (see FIG. 1), and the switching unit according to the switching operation of the handset switching switch 6 ( Look at the operation of C) (C ').

제3도에서 전환스위치(6)의 단자를 단자(ㄱ)에 연결하였을때, 전원전압(B)은 저항(R1)을 통하여 트랜지스터(T1)를 도통시키며, 이에 의해 저항(R3)(R4)사이의 접합점(Ⅰ)에는 다이오드(D1)를 도통시킬 수 있는 전압이 형성된다. 이에 따라 단자(ㄷ)에 인가된 신호는 콘덴서(C1), 다이오드(D1), 콘덴서(C3)를 경유하여 단자(ㅁ)에서 출력될 수 있다.In FIG. 3, when the terminal of the changeover switch 6 is connected to the terminal a, the power supply voltage B conducts the transistor T 1 through the resistor R 1 , whereby the resistor R 3 is conducted. At the junction I between R 4 , a voltage capable of conducting the diode D 1 is formed. Accordingly, the signal applied to the terminal (c) may be output from the terminal (ㅁ) via the capacitor C 1 , the diode D 1 , and the capacitor C 3 .

한편, 제3도에서 전환스위치(6)의 단자를 단자(ㄴ)에 연결한 경우에는 전원전압(B+)이 저항(R2)을 통하여 트랜지스터(TR2)를 도통시킴으로써 저항(R4)(R6) 사이의 접합점(Ⅱ)에는 다이오드(D2)를 도통시킬 수 있는 전압이 형성된다. 이에 의해 단자(ㅁ)에 인가된 신호는 콘덴서(C3), 다이오드(D2), 콘센더(C2)를 경유하여 단자(ㄹ)에서 출력될 수 있게 된다.On the other hand, in FIG. 3, when the terminal of the changeover switch 6 is connected to the terminal b, the power supply voltage B + conducts the transistor TR 2 through the resistor R 2 so that the resistor R 4 is conducted. At the junction (II) between (R 6 ), a voltage capable of conducting the diode D 2 is formed. As a result, the signal applied to the terminal (ㅁ) can be output from the terminal (l) via the capacitor (C 3 ), the diode (D 2 ), and the condenser (C 2 ).

이하에 송수화 전환부(C)(C')를 포함한 전체회로에 있어서 절환동작을 설명한다.The switching operation in the entire circuit including the handset switching unit C (C ') will be described below.

먼저, 송상동작을 위해, 예컨대 전환스위치(6)를 눌렀다고 가정하면, 안테나 (7)측의 전환부(C)에서 전환스위치(6)의 일단의 단자(ㄱ)에 접속되므로써 송상계통부 (B)내의 혼합기(17)에서 출력되는 영상 및 음성의 RF 변조 신호는 전환부(c)내의 단자(ㄷ) (이는 제2도의 a1에 해당), 콘덴서(C1), 다이오드(D1), 콘덴서(C3), 단자(ㅁ) (이는 제2도의 a3에 해당 및 안테나(7)를 통하여 송신될 수 있으며, 스피커(다)측의 전환부(C')에서 전환스위치(6)의 일단은 단자(ㄴ)에 접속됨으로써 마이크로에서 작동하는 스피커(다)를 통해 입력되는 음성 AF 신호는 전환부(C')내의 단자(ㅁ) (이는 제2도의 a3'에 해당), 콘덴서 (C3), 다이오드(D2), 콘덴서(C2), 단자(ㄹ) (이는 제2도의 a1'에 해당)을 통하여 송상계통부(B)내의 음성증폭기(21)의 입력단에 인가된다.First, assuming that the changeover switch 6 is pressed for the sending operation, for example, the switchboard portion (A) on the antenna 7 side is connected to the terminal (a) of one end of the changeover switch (6). RF modulated signals of video and audio output from the mixer 17 in B) are connected to the terminal c in the switching unit c (this corresponds to a 1 in FIG. 2), the capacitor C 1 , and the diode D 1 . , Condenser (C 3 ), terminal (ㅁ) (which corresponds to a 3 in FIG. 2 and can be transmitted via the antenna 7), and at the switching section (C ′) of the speaker (c) side, the changeover switch (6) One end of is connected to the terminal (b), so that the audio AF signal input through the speaker (c) operating in the micro is connected to the terminal (ㅁ) (which corresponds to a 3 'in FIG. 2) in the switching unit C', (C 3 ), diode (D 2 ), capacitor (C 2 ), and terminal (ㄹ) (which corresponds to a 1 ′ in FIG. 2) to the input of voice amplifier 21 in the transmission system section B. do.

다음에, 수상동작을 위해, 예컨대 전환스위치(6)를 누르지 않고 그대로 방치한 상태로 두게 되면, 안테나(7)측의 전환부(C)에서 전환스위치(6)의 일단은 상기와는 반대로 단자(ㄴ)에 접속됨으로써 안테나(7)를 통하여 수신되는 RF 변조신호는 전환부(C)내의 단자(ㅁ)(이는 제2도의 a3에 해당), 콘덴서(C3), 다이오드(D2), 콘덴서 (C2), 단자(ㄹ)(이는 제2도의 a2에 해당)을 통하여 수상계통부(A)내의 튜너(2)의 입력단에 인가되게 되며, 스피커(다)측의 전환부(C')에서 전환스위치(6)의 일단은 단자(ㄱ)에 접속됨으로써 수상계통부(A)내의 음성증폭기(16)에서 출력되는 음성 AF 신호는 전환부(C')내의 단자(ㄷ) (이는 제2도의 a2'에 해당), 콘덴서(C1),다이오드 (D2), 콘덴서(C3), 단자(ㅁ)(이는 제2도의 a3'에 해당)및 스피커(다)를 통하여 음성으로 출력되게 된다.Next, for the water phase operation, if left unchanged without pressing the changeover switch 6, for example, one end of the changeover switch 6 in the changeover section C on the antenna 7 side has a terminal opposite to the above. The RF modulated signal received through the antenna 7 by being connected to (b) is connected to the terminal (ㅁ) (which corresponds to a 3 in FIG. 2), the capacitor C 3 and the diode D 2 in the switching unit C. , Through the condenser (C 2 ) and the terminal (d) (which corresponds to a 2 in FIG. 2) to the input of the tuner (2) in the water system (A), C '), one end of the switching switch 6 is connected to the terminal a so that the audio AF signal output from the voice amplifier 16 in the water system A is connected to the terminal C in the switching unit C' ( This corresponds to a 2 ′ in FIG. 2), condenser (C 1 ), diode (D 2 ), condenser (C 3 ), terminal (ㅁ) (which corresponds to a 3 ′ in FIG. 2) and the speaker (C). It is output through voice.

미설명부호 (가)는 렌즈(LENS), 8 및 9는 송상 및 수상방송 검출표시용 LED이다.Unexplained symbols (A) Lens (LENS), 8 and 9 are LED for transmission and water detection detection indication.

이와같은 구조의 본 발명의 구성은 송상장치로 할 때는, 전환부(C)(C')의 스위치(6)를 누르면 스위치(6)가 등가적 접점(a1)(a1')에 이어져서 송상계통부(B)의 양측에 안테나(7)와 스피커(다)가 연결된다.According to the configuration of the present invention having such a structure, when the switch 6 of the switching unit C (C ') is pressed, the switch 6 follows the equivalent contact a 1 (a 1 ′). The antenna 7 and the speaker C are connected to both sides of the transmission system B.

여기서, 필요에 따라 송수상절환 스위치의 송수상 선택에 따른 누름 방향을 반대로 해도 된다.Here, if necessary, the pressing direction of the handset phase selection of the handset phase switching switch may be reversed.

이때 반도체소자로 집적화된 고체 촬상부(가)에 의해 송화자의 얼굴이 직접적으로 촬상되어 영상신호를 얻은 후 이는 영상증폭기(19), 영상변조기(18)를 통하여 혼합기(17)에 가해지는 한편, 음성은 스피커(다)를 통하여 음성증폭기(21), 음성변조기 (20)에 가해지며, 이의 출력이 혼합기(17)에 인가되어 안테나로 송신이 된다.At this time, the face of the caller is directly imaged by the solid-state imaging unit integrated with the semiconductor device to obtain an image signal, which is applied to the mixer 17 through the image amplifier 19 and the image modulator 18, The voice is applied to the voice amplifier 21 and the voice modulator 20 through the speaker C, and its output is applied to the mixer 17 to be transmitted to the antenna.

이때, 상대편에선 전환부(C)(C')의 스위치(6)를 누르지 않고 그대로 두게 되면, 스위치(6)가 등가적 접점(a2)(a2')에 이어져 수상계통부(B)의 양측은 안테나 (7)와 스피커(다)에 연결되어 있게 되는데, 안테나(7)를 통하여 RF 변조신호가 입력될 때, 송상방송 검출표시용 LED (8)가 커지면서 수상계통부(A)의 검파 및 증폭기등에 의하여 상대방의 촬상된 화면이 표시장치(나)에 나타나고, 상대방의 전원이 스피커(다)로 출력되는 것이다. 여기서 필요하다면 송상방송 검출시 스피커 (다)를 통해 벨 또는 경보음이 발생하도록 하여도 좋다.At this time, if the switch 6 of the switching unit C (C ') is left without pressing the switch 6, the switch 6 is connected to the equivalent contact point a 2 (a 2 ') and the water phase system unit B Both sides of are connected to the antenna (7) and the speaker (C). When the RF modulated signal is input through the antenna (7), the transmission broadcast detection display LED (8) becomes larger, The screen of the other party is detected on the display device (B) by the detection and the amplifier, and the other party's power is output to the speaker (C). If necessary, the bell or alarm sound may be generated through the speaker (c) when detecting the broadcasting broadcast.

이에 응답하여 수화자가 송화하기 위해서 전환부(C)(C')의 스위치(6)를 누르면, 등가적접점(a1)(a1')에 스위치(6)가 접속되어 전술한 바와 같이 송상계통부(B)의 양측에 안테나(7)와 스피커(가)연결되면서 수화자의 화면과 전원이 송상계통부(B)의 촬상기(가)와 스피커(다)에 의해 송상계통부(B)에 입력된 후 안테나(7)를 통하여 송화자의 측으로 전송된다.In response to this, when the called party presses the switch 6 of the switching unit C (C ') in order to talk, the switch 6 is connected to the equivalent contact point a 1 (a 1 ′) and the sound is transmitted as described above. The antenna 7 and the speaker are connected to both sides of the system part B, and the picture and the power of the receiver are transmitted by the imager A of the transmission system part B and the speaker C. After inputting to the transmitter, it is transmitted to the talker's side through the antenna 7.

이와같이, 전환부(C)(C')의 스위치(6)의 전환에 따라 송·수상전환은 물론 단일의 스피커(다)로 송·수환전환이 이뤄지게 된다.In this way, according to the switching of the switch 6 of the switching unit C (C '), the transmission / reception switching is performed by a single speaker as well as the transmission / reception switching.

이러한 본 발명은 통상의 트랜시버에 간이 화상을 위한 송·수상기능을 부여하므로서 이러한 물품의 사용상의 신뢰성을 향상시키고 이용가치를 현저히 상승시킨 유익한 특징이 있다.The present invention has an advantageous feature that improves the reliability of use of such an article and significantly increases the use value by giving a conventional transceiver a transmission / reception function for a simple image.

Claims (1)

(2회 정정) 송수화스피커(다), 송수화전환스위치(6), 슬라이드볼륨(5), 전원 온·오프스위치(3), 안테나(7)를 갖춘 트랜시버에 있어서, 송수상주파수 선택스위치 (1,2)와 보조조명 스위치(4)를 상면에 배열 설치하고, 전면부엔 고체 촬상관이 내설된 반도체형 촬상부(가)와 수상용 박막모니터부(나) 및 송수화스피커(다)를 설치하며, 그 내측에는 송·수상계통부(A, B)를 설치하되, 수상계통부(A)내의 튜터(2 )의 입력단과 음성증폭기(16)의 출력단을 각각 전환부(C)(C')의 등가적 접점(a2)(a2')에 연결하고 송상계통부(B)내의 혼합기(17)의 출력단과 음성증폭기(21)의 입력단을 각각 전환부 (C),(C')의 등가적 접점(a1)(a1')에 연결하는 동시에 안테나(7)와 스피커(다)의 일단을 전환부(C)(C')의 등가적 접점(a3)(a3')에 연결하여 구성된 것을 특징으로 하는 화면전송이 가능한 휴대용 송·수상장치.(Twice Correction) A transceiver comprising a handset speaker (C), a handset switching switch (6), a slide volume (5), a power on / off switch (3), and an antenna (7). (1, 2) and the auxiliary light switch (4) are arranged on the upper surface, the semiconductor image pickup unit (a), the water-based thin film monitor unit (b) and the handset speaker (c) with a solid-state imaging tube built in the front part The inside of the water supply and reception system (A, B) is installed, and the input of the tutor (2) and the output of the voice amplifier (16) in the water system (A) are respectively switched to (C) ( C ') is connected to the equivalent contact (a 2 ) (a 2 ') and the output of the mixer 17 in the transmission system section (B) and the input of the voice amplifier 21, respectively, switching sections (C), (C Is connected to the equivalent contact (a 1 ) (a 1 ′) at the same time, and the one end of the antenna (7) and the speaker (C) is equivalent to the equivalent contact (a 3 ) (a) of the switching unit (C) (C ′). 3 ') can be connected to the screen, characterized in that configured Portable transmitter and receiver.
KR1019830006208A 1983-12-27 1983-12-27 Walkie-talkie KR870000987B1 (en)

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KR1019830006208A KR870000987B1 (en) 1983-12-27 1983-12-27 Walkie-talkie

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KR1019830006208A KR870000987B1 (en) 1983-12-27 1983-12-27 Walkie-talkie

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KR850005186A KR850005186A (en) 1985-08-21
KR870000987B1 true KR870000987B1 (en) 1987-05-16

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