CN207753704U - A kind of compatible with DVB-T, the three-in-one tuner that output is exported and modulated with RF loops - Google Patents
A kind of compatible with DVB-T, the three-in-one tuner that output is exported and modulated with RF loops Download PDFInfo
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- CN207753704U CN207753704U CN201721599323.2U CN201721599323U CN207753704U CN 207753704 U CN207753704 U CN 207753704U CN 201721599323 U CN201721599323 U CN 201721599323U CN 207753704 U CN207753704 U CN 207753704U
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Abstract
The three-in-one tuner for exporting and modulating output the utility model discloses a kind of compatible with DVB T, with RF loops, is equipped with radio frequency input adapter, radiofrequency low-noise amplifying circuit, power distribution module, radio frequency processing module, radio-frequency modulations module and radio frequency out splice going splice；Radiofrequency low-noise amplifying circuit can amplify the radiofrequency signal using DVB T standards inputted by radio frequency input adapter；Radio frequency processing module can be converted to intermediate-freuqncy signal output from the radiofrequency signal inputted by power distribution module after amplifying the part of frequency specified by control instruction；Radio-frequency modulations module can be selected radiofrequency signal made of exporting the radiofrequency signal inputted by power distribution module or being modulated by audio-video signal by control instruction.The utility model can realize that DVB T radiofrequency signal frequency-selectings output is modulated into radiofrequency signal output at intermediate-freuqncy signal, the output of RF signal loops, audio-video signal, have the advantages that performance is high, sensitivity is good, the three-in-one television for being suitable for DVB T, the output of RF loops and modulated signal receives system.
Description
Technical field
The three-in-one tuner of output is exported and modulated the utility model is related to a kind of compatible with DVB-T, with RF loops.
Background technology
Present TV receiving system, basic function are to receive digital television signal and export (working frequency with RF loops
For 51MHZ-860MHZ) and RF modulation outputs, generally Digital TV Receiving be receive all the way rather than four tunnel simultaneously, four tunnels
It receives simultaneously, the output of RF loops is also to separate to export respectively, but will appear technical indicator difficulty and reach regulation with RF modulation output ends
It is required that (DVB-T, RF loop export and RF modulation output hardly possiblies are compatible, is also easy to produce interference), and currently without DVB-T, RF loop
The three-in-one tuner of output and RF modulation outputs.
Utility model content
Technical problem to be solved in the utility model is：There is provided a kind of compatible with DVB-T, band RF loops are exported and modulated defeated
The three-in-one tuner gone out.
Above-mentioned technical problem is solved, technical solution is as follows used by the utility model：
A kind of compatible with DVB-T, the three-in-one tuner that output is exported and modulated with RF loops, it is characterised in that：Described
Three-in-one tuner is equipped with radio frequency input adapter, radiofrequency low-noise amplifying circuit, power distribution module, radio frequency processing module, radio frequency
Modulation module and radio frequency out splice going splice；The use that the radiofrequency low-noise amplifying circuit can will be inputted by the radio frequency input adapter
The radiofrequency signal of DVB-T standards is amplified and is exported to the power distribution module；The power distribution module corresponds to each described
Radio frequency processing module and each radio-frequency modulations module are all provided with there are one output end, and the power distribution module can will be by
The radiofrequency signal of the radiofrequency low-noise amplifying circuit input, which is divided equally to its each output end, to be exported；The radio frequency processing module it is defeated
Enter end and connect the corresponding output end of the power distribution module, and the radio frequency processing module can receive external piloting control machine hair
The control instruction sent, and from the radiofrequency signal inputted by the power distribution module, by frequency specified by the control instruction
Part amplification after be converted to intermediate-freuqncy signal output；The radio-frequency modulations module can be received to be corresponded to by the power distribution module
The radiofrequency signal of output end input, and the radiofrequency signal is exported by the radio frequency out splice going splice, also, the radio-frequency modulations
Module can receive the audio-video signal inputted by external piloting control machine, and lead to after the audio-video signal is modulated into radiofrequency signal
The radio frequency out splice going splice output is crossed, and the radio-frequency modulations module can receive the control instruction of external piloting control machine transmission,
And it exports the radiofrequency signal inputted by the power distribution module by control instruction selection or is modulated by the audio-video signal
Made of radiofrequency signal.
As preferred embodiments of the present invention：The three-in-one tuner is set there are four the radio frequency processing mould
Block.
As preferred embodiments of the present invention：The radiofrequency low-noise amplifying circuit uses model BFP196W
Radiofrequency low-noise amplification chip.
As preferred embodiments of the present invention：The power distribution module is using model MAAM008820's
Power divider.
As preferred embodiments of the present invention：The radio frequency processing module uses at the frequency of model SI2124
Manage chip.
As preferred embodiments of the present invention：The radio-frequency modulations module by model RT500 radio frequency tune
Coremaking piece and its peripheral circuit composition.
Compared with prior art, the utility model has the advantages that：
The utility model is equipped with radio frequency input adapter, radiofrequency low-noise amplifying circuit, power distribution module, radio frequency processing mould
Block, radio-frequency modulations module and radio frequency out splice going splice can realize DVB-T radiofrequency signal frequency-selectings output at intermediate-freuqncy signal, RF signals
Loop output, audio-video signal be modulated into radiofrequency signal output, have the advantages that performance height, sensitivity it is good, be suitable for DVB-T,
RF loops export and the three-in-one television of modulated signal receives system.
Description of the drawings
The utility model is described in further detail in the following with reference to the drawings and specific embodiments：
Fig. 1 is the schematic block circuit diagram of the three-in-one tuner of the utility model.
Specific implementation mode
As shown in Figure 1, it is disclosed by the utility model be a kind of compatible with DVB-T, export and modulate the three of output with RF loops
Unify tuner, is equipped with radio frequency input adapter, radiofrequency low-noise amplifying circuit, power distribution module, radio frequency processing module, radio frequency tune
Molding block and radio frequency out splice going splice；Radiofrequency low-noise amplifying circuit can use DVB-T standards by what is inputted by radio frequency input adapter
Radiofrequency signal amplify and export to power distribution module；Power distribution module corresponds to each radio frequency processing module and each radio frequency
Modulation module is all provided with there are one output end, and the radiofrequency signal that power distribution module can will be inputted by radiofrequency low-noise amplifying circuit
Respectively exported to its each output end；The corresponding output end of input terminal connection power distribution module of radio frequency processing module, and penetrate
Frequency processing module can receive the control instruction of external piloting control machine transmission, and from the radiofrequency signal inputted by power distribution module
In, will frequency specified by control instruction part amplify after be converted to intermediate-freuqncy signal output, the intermediate-freuqncy signal can be export to
Aforementioned master controller is decoded intermediate-freuqncy signal by master controller, to be played out to DVB-T programs, realizes three-in-one
The DVB-T radiofrequency signal frequency-selectings of tuner are exported into intermediate-freuqncy signal；Radio-frequency modulations module can be received by power distribution module pair
The radiofrequency signal for answering output end to input, and the radiofrequency signal is exported by radio frequency out splice going splice, to realize three-in-one tuner
The output of RF loop signals, also, radio-frequency modulations module can receive audio-video signal input by external piloting control machine, and general
The audio-video signal is exported after being modulated into radiofrequency signal by radio frequency out splice going splice, to realize the modulated signal of three-in-one tuner
Output, and radio-frequency modulations module can receive the control instruction of external piloting control machine transmission, and by control instruction selection output
Radiofrequency signal made of being modulated by radiofrequency signal, that is, ground loop signals of power distribution module input or by audio-video signal is i.e.
Modulated signal.
In the preferred embodiment of the three-in-one tuner of the utility model, set there are four radio frequency processing module, wherein on
The radiofrequency low-noise amplification chip that radiofrequency low-noise amplifying circuit uses model BFP196W is stated, above-mentioned power distribution module uses type
Number be MAAM008820 power divider, above-mentioned radio frequency processing module use model SI2124 radio frequency processing chip, on
Radio-frequency modulations module is stated to be made of the radio-frequency modulations chip and its peripheral circuit of model RT500.
Using above preferred embodiment three-in-one tuner when, the automatic growth control end IF of radio frequency processing chip
AGC, intermediate-freuqncy signal output end IF, serial clock input terminal SCL, serial data input SDA are connected respectively to master controller
Corresponding port, the control instruction that master controller is sent to radio frequency processing chip include to be transmitted by automatic growth control end IF AGC
Automatic growth control instruction, by the clock signal of serial clock input terminal SCL transmission and pass through serial data input SDA
The frequency-selecting control instruction of transmission, wherein frequency-selecting control instruction from radiofrequency signal for specifying the frequency being amplified, automatic gain
Control instruction is for controlling the multiple being amplified.Also, the serial clock input terminal SCL of radio-frequency modulations chip, serial data are defeated
Enter to hold SDA, video signal input terminal, audio signal input end to be connected respectively to the corresponding port of master controller, master controller hair
The control instruction for giving radio-frequency modulations chip includes the clock signal by the SCL transmission of serial clock input terminal and passes through serial number
Control instruction is selected according to the output of input terminal SDA transmission, output selection control instruction is for controlling the output of radio-frequency modulations chip
The radiofrequency signal or the radiofrequency signal made of audio-video signal modulation inputted by the power distribution module.
The operation principle of the three-in-one tuner of above preferred embodiment is as follows：
First, it is put through RF low noise wideband amplification circuits by feed-in on F type input heads from outdoor TV signal (RF)
It after big, be input to work(sub-module and four road RF signals is separated by work(again, wherein three road signals access RF processing modules.RF processing modules
Radiofrequency signal is converted into intermediate frequency (IF) frequency signal that master controller can identify, RF processing modules connect phase with master controller
Answer port, master controller that can reach by the control RF processing modules of I2C buses and IFAGC, IF and arbitrarily watch different channel
Effect.
Second, the signals of RF all the way and vision signal, audio signal of another way work(point output be linked into the output of RF signals/
Modulated signal output module signal input part, by master controller to the control process of RF loops output/modulated signal output module,
To corresponding output RF signals or RF modulated signals.
The utility model is not limited to above-mentioned specific implementation mode, according to the above, according to the ordinary skill of this field
Knowledge and customary means, under the premise of not departing from the utility model above-mentioned basic fundamental thought, the utility model can also be made
Equivalent modifications, replacement or the change of other diversified forms are all fallen among the scope of protection of the utility model.Such as：This practicality
One to three or five or more radio frequency processing module can be also arranged in novel three-in-one tuner.
Claims (6)
1. a kind of compatible with DVB-T, the three-in-one tuner that output is exported and modulated with RF loops, it is characterised in that：Described three
Unify tuner and is equipped with radio frequency input adapter, radiofrequency low-noise amplifying circuit, power distribution module, radio frequency processing module, radio frequency tune
Molding block and radio frequency out splice going splice；The use that the radiofrequency low-noise amplifying circuit can will be inputted by the radio frequency input adapter
The radiofrequency signal of DVB-T standards is amplified and is exported to the power distribution module；The power distribution module corresponds to each described
Radio frequency processing module and each radio-frequency modulations module are all provided with there are one output end, and the power distribution module can will be by
The radiofrequency signal of the radiofrequency low-noise amplifying circuit input, which is divided equally to its each output end, to be exported；The radio frequency processing module it is defeated
Enter end and connect the corresponding output end of the power distribution module, and the radio frequency processing module can receive external piloting control machine hair
The control instruction sent, and from the radiofrequency signal inputted by the power distribution module, by frequency specified by the control instruction
Part amplification after be converted to intermediate-freuqncy signal output；The radio-frequency modulations module can be received to be corresponded to by the power distribution module
The radiofrequency signal of output end input, and the radiofrequency signal is exported by the radio frequency out splice going splice, also, the radio-frequency modulations
Module can receive the audio-video signal inputted by external piloting control machine, and lead to after the audio-video signal is modulated into radiofrequency signal
The radio frequency out splice going splice output is crossed, and the radio-frequency modulations module can receive the control instruction of external piloting control machine transmission,
And it exports the radiofrequency signal inputted by the power distribution module by control instruction selection or is modulated by the audio-video signal
Made of radiofrequency signal.
2. compatible with DVB-T, the three-in-one tuner with the output of RF loops and modulation output according to claim 1, feature
It is：The three-in-one tuner is set there are four the radio frequency processing module.
3. compatible with DVB-T according to claim 1 or claim 2, the three-in-one tuner that output is exported and modulated with RF loops, special
Sign is：The radiofrequency low-noise amplifying circuit uses the radiofrequency low-noise amplification chip of model BFP196W.
4. compatible with DVB-T according to claim 1 or claim 2, the three-in-one tuner that output is exported and modulated with RF loops, special
Sign is：The power distribution module uses the power divider of model MAAM008820.
5. compatible with DVB-T according to claim 1 or claim 2, the three-in-one tuner that output is exported and modulated with RF loops, special
Sign is：The radio frequency processing module uses the radio frequency processing chip of model SI2124.
6. compatible with DVB-T according to claim 1 or claim 2, the three-in-one tuner that output is exported and modulated with RF loops, special
Sign is：The radio-frequency modulations module is made of the radio-frequency modulations chip and its peripheral circuit of model RT500.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721599323.2U CN207753704U (en) | 2017-11-23 | 2017-11-23 | A kind of compatible with DVB-T, the three-in-one tuner that output is exported and modulated with RF loops |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721599323.2U CN207753704U (en) | 2017-11-23 | 2017-11-23 | A kind of compatible with DVB-T, the three-in-one tuner that output is exported and modulated with RF loops |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207753704U true CN207753704U (en) | 2018-08-21 |
Family
ID=63148151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721599323.2U Active CN207753704U (en) | 2017-11-23 | 2017-11-23 | A kind of compatible with DVB-T, the three-in-one tuner that output is exported and modulated with RF loops |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207753704U (en) |
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2017
- 2017-11-23 CN CN201721599323.2U patent/CN207753704U/en active Active
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