CN214591685U - Full-standard double-channel digital television tuner cavity shell - Google Patents
Full-standard double-channel digital television tuner cavity shell Download PDFInfo
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- CN214591685U CN214591685U CN202023183442.4U CN202023183442U CN214591685U CN 214591685 U CN214591685 U CN 214591685U CN 202023183442 U CN202023183442 U CN 202023183442U CN 214591685 U CN214591685 U CN 214591685U
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Abstract
The utility model discloses a full standard binary channels digital television tuner chamber shell, the side of shell frame is along being provided with two way satellite digital signal and a ground digital television signal mouth input terminal, is six installation element spaces with intracavity space separation by the gusset of erectting in the 100 cavities of shell frame. The space 190 of the satellite digital low-noise frequency converter unit and the space 191 of the signal demodulation unit are arranged at the far end of the input port of the television signal port in parallel. The multi-system dual-channel receiver has the advantages of compact size, capability of meeting the receiving requirement of multi-system dual channels and strong anti-interference performance.
Description
Technical Field
The utility model belongs to video signal receiving equipment makes the field.
Background
In recent years, as users in different regions are limited by living environments, users have to watch television programs by means of different receiving media; for example, the digital cable television (DVB-C) is mainly used for watching television programs in cities, towns and rural areas with better economic conditions; digital satellite televisions (DVB-S/S2/S2X) are mainly used for watching television programs in remote rural areas and pastures which are widely scattered; digital terrestrial television (DVB-T/T2) is mainly used for watching television programs in mobile environments such as urban public transport systems and the like; such a number of digital tv standards urgently require an electronic tuner carrying full-standard digital tv standards to meet the needs of users, especially european users.
In view of the above insufficiency of the prior art, the object of the present invention is to design a metal cavity of digital-analog signal receiving electronic tuner for the electronic tuner of the full-system digital television standard, which satisfies the requirement and provides dual-channel display, so that the metal cavity has the advantages of compact size and strong anti-interference performance.
SUMMERY OF THE UTILITY MODEL
The purpose of the utility model is realized through following means.
A full-system double-channel digital television tuner cavity shell is composed of a shell frame 100 provided with a central component, an upper cover 200 and a lower cover 300 which cover the shell frame. Two paths of satellite digital signals and a ground digital television signal port input terminal, namely a satellite main port 110, a satellite branch port 120 and a ground digital television signal port 130, are arranged on the side edge of the shell frame; the cavity of the shell frame 100 is internally divided into six installation unit spaces by vertical rib plates, namely: a main satellite signal receiving unit space 150, a split satellite signal receiving unit space 160, a cable/terrestrial digital signal receiving unit space 170, a satellite signal processing unit space 180; a cable/terrestrial digital signal processing unit 181, a satellite digital low noise converter unit space 190, and a signal demodulation unit space 191; the space 190 of the satellite digital low-noise frequency converter unit and the space 191 of the signal demodulation unit are arranged at the far end of the input port of the television signal port in parallel.
The tuner adopting the structure of the utility model can not only realize the receiving of the full-system digital television, but also switch the receiving of different system standards at will, thereby satisfying the function of one machine with multiple purposes; meanwhile, in order to cope with the continuous impact of the network television, the entertainment function of the television is enhanced, and the picture-in-picture (PIP) function can be realized. The multi-system dual-channel receiver has the advantages of compact size, capability of meeting the receiving requirement of multi-system dual channels and strong anti-interference performance.
Drawings
Fig. 1 is a structural diagram of the present invention with the upper cover and the lower cover removed.
Fig. 2 is a schematic view of the installation structure of the present invention.
Detailed Description
Fig. 2 shows the situation of the tuner housing of the dual-channel digital tv of the present invention when it is installed and used, which is composed of a metal housing frame 100 with a central component, and an upper cover 200 and a lower cover 300 covering the metal housing frame, wherein 400 is a PCB board of the tuner.
As can be seen from fig. 1, two paths of satellite digital signals and a terrestrial digital television signal port input terminal, i.e., a satellite main port 110, a satellite branch port 120 and a terrestrial digital television signal port 130, are riveted to the side edge of the housing frame. The cavity of the shell frame 100 is internally divided into six installation unit spaces by vertical rib plates, namely: a main satellite signal receiving unit space 150, a split satellite signal receiving unit space 160, a cable/terrestrial digital signal receiving unit space 170, a satellite signal processing unit space 180; a cable/terrestrial digital signal processing unit 181, a satellite digital low noise converter unit space 190, and a signal demodulation unit space 191; the space 190 of the satellite digital low-noise frequency converter unit and the space of the signal demodulation unit 191 are arranged at the far end of the input port of the television signal port in parallel.
The satellite signal processing unit can simultaneously process two paths of RF signals and output two paths of zero intermediate frequency I/Q signals; one path of narrow-band low intermediate frequency signal and zero intermediate frequency I/Q signal are directly output to an external interface of the electronic tuner for internal demodulation and decoding IC processing of the television, so that the function of picture-in-picture is realized; one path of narrow-band low intermediate frequency signal and zero intermediate frequency I/Q signal are demodulated and output digital TS signal through the inside of the electronic tuner, and the requirement of television reception of users is met. The tuning selection of all receiving channels is completed by a PLL control circuit, namely, the channel information sent by the data line is processed and then the corresponding channel is directly selected. The local oscillator frequency point of the mixing stage is controlled by a PLL phase locked loop.
The satellite digital low noise converter unit space 190 and the signal demodulation unit space 191 are arranged in parallel at the far end of the input port of the television signal port, and the problem of signal interference is well solved under the condition of compact space arrangement.
Claims (1)
1. A full system type double channel digital TV tuner cavity shell is composed of a shell frame (100) provided with a central component, an upper cover (200) and a lower cover (300) covering the shell frame, and is characterized in that two paths of satellite digital signals and a ground digital TV signal port input terminal, namely a satellite main port (110), a satellite branch port (120) and a ground digital TV signal port (130), are arranged on the side edge of the shell frame; the vertical rib plates in the cavity of the shell frame (100) divide the cavity space into six installation unit spaces, namely: a main satellite signal receiving unit space (150), a split satellite signal receiving unit space (160), a cable/ground digital signal receiving unit space (170), a satellite signal processing unit space (180); a cable/ground digital signal processing unit (181), a satellite digital low noise frequency converter unit space (190) and a signal demodulation unit space (191); the space (190) of the satellite digital low-noise frequency converter unit and the space (191) of the signal demodulation unit are arranged at the far end of the input port of the television signal port in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023183442.4U CN214591685U (en) | 2020-12-25 | 2020-12-25 | Full-standard double-channel digital television tuner cavity shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023183442.4U CN214591685U (en) | 2020-12-25 | 2020-12-25 | Full-standard double-channel digital television tuner cavity shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214591685U true CN214591685U (en) | 2021-11-02 |
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ID=78366400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023183442.4U Active CN214591685U (en) | 2020-12-25 | 2020-12-25 | Full-standard double-channel digital television tuner cavity shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214591685U (en) |
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2020
- 2020-12-25 CN CN202023183442.4U patent/CN214591685U/en active Active
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