CN210927851U - Tuner signal detection system - Google Patents
Tuner signal detection system Download PDFInfo
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- CN210927851U CN210927851U CN202020029493.2U CN202020029493U CN210927851U CN 210927851 U CN210927851 U CN 210927851U CN 202020029493 U CN202020029493 U CN 202020029493U CN 210927851 U CN210927851 U CN 210927851U
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Abstract
The utility model relates to a tuner signal detecting system, including power module, detection module, output module and CPU, detection module includes signal strength detection sensor, ADI signal detection chip, filtering selection circuit, high frequency filter, intermediate frequency filter and low frequency filter, power module is used for giving the ADI signal detection chip power supply for detect satellite signal strength detection sensor is connected with the input electricity of ADI signal detection chip, the output of ADI signal detection chip with filtering selection circuit input electricity is connected, filtering selection circuit's output respectively with high frequency filter, intermediate frequency filter are connected with the low frequency filter input electricity, high frequency filter, intermediate frequency filter and low frequency filter output are connected with the output module electricity respectively. The utility model discloses can effectively improve the interference killing feature of tuner for the tuner also can normally work under stronger electromagnetic environment, improves user's use and experiences.
Description
Technical Field
The utility model relates to a tuner technical field especially relates to a tuner signal detecting system.
Background
A general satellite television system includes an antenna, a tuner, a set-top box, and a television, where the tuner is used to process a satellite signal received by the antenna, amplify and filter the satellite signal, and send the amplified signal to the set-top box. For most of high frequency head, the received satellite signal is disordered, and useless other signals are often mixed between useful large signals, even in some areas with serious electromagnetic interference, the collected signals are weak. In this case, the amplifier and the filter may not be able to detect a useful weak signal, and the weak useful signal is often amplified along with an unwanted interference signal, which is not favorable for the set-top box to process.
SUMMERY OF THE UTILITY MODEL
Based on this, it is necessary to provide a tuner signal detection system for the situation that the satellite signal is seriously interfered and is not easy to be detected, which can effectively improve the anti-interference capability of the tuner, so that the tuner can also work normally in a strong electromagnetic environment, and the use experience of a user is improved.
The utility model provides a tuner signal detection system, includes power module, detection module, output module and CPU, detection module includes signal strength detection sensor, ADI signal detection chip, filtering selection circuit, high frequency filter, intermediate frequency filter and low frequency filter, power module is used for giving ADI signal detection chip power supply for detect satellite signal strength detection sensor is connected with ADI signal detection chip's input electricity, ADI signal detection chip's output with filtering selection circuit input electricity is connected, filtering selection circuit's output respectively with high frequency filter, intermediate frequency filter are connected with the low frequency filter input electricity, high frequency filter, intermediate frequency filter and low frequency filter output are connected with the output module electricity respectively.
Preferably, the power supply module comprises a power supply, a switch control unit and a USB interface which are electrically connected in sequence, and the CPU is electrically connected with a control end of the switch control unit.
Preferably, the output module includes a signal comparator, a demodulation unit and an amplifier, an input end of the signal comparator is electrically connected to the high-frequency filter, the intermediate-frequency filter and the low-frequency filter, respectively, and an output end of the signal comparator is electrically connected to the amplifier through the demodulation unit.
Preferably, the CPU model is ARM Cortex-A9.
Preferably, the ADI signal detection chip is ADP8866 ACPZ-R7.
The utility model discloses an useful part lies in: 1. an ADI signal detection chip is arranged in a detection system and matched with a signal strength detection sensor to detect received satellite signals, a side-by-side result is fed back to a CPU, the CPU selects different filters through a filter selection circuit to filter, signals with different frequencies can be filtered, clutter signal interference is avoided, and signal output quality is improved; 2. the power supply module is arranged and can supply power for the tuners of different models, and the universality of the power supply module is improved.
Drawings
Fig. 1 is a schematic circuit diagram of a tuner signal detection system according to an embodiment of the invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, a tuner signal detection system includes a power supply module 1, a detection module 2, an output module 3 and a CPU4, the detection module 2 comprises a signal strength detection sensor 21, an ADI signal detection chip 22, a filter selection circuit 23, a high-frequency filter 24, an intermediate-frequency filter 25 and a low-frequency filter 26, the power supply module 1 is used for supplying power to the ADI signal detection chip 22, the signal strength detection sensor 21 for detecting the satellite signal strength is electrically connected to an input terminal of the ADI signal detection chip 22, the output end of the ADI signal detection chip 22 is electrically connected with the input end of the filter selection circuit 23, the output end of the filter selection circuit 23 is electrically connected with the input ends of the high-frequency filter 24, the intermediate-frequency filter 25 and the low-frequency filter 26 respectively, the output ends of the high-frequency filter 24, the intermediate-frequency filter 25 and the low-frequency filter 26 are respectively electrically connected with the output module 3. Specifically, in this embodiment, the CPU4 is of an ARM Cortex-a9 type, and the ADI signal detection chip 22 is of an ADP8866ACPZ-R7 type. The power supply module 1 is generally integrated on a power control board (not shown in the figure) of the set-top box, and a power supply circuit is not required to be additionally arranged in the tuner. The control end of the power supply module 1 is electrically connected with the CPU4, so that the CPU4 can determine the type of the accessed tuner according to the signal provided by the ADI signal detection chip 22, and further send control information to the power supply module 1, adjust the output voltage of the power supply module 1, and improve the adaptability of the power supply module 1. Furthermore, the detection module 2 is provided with a signal strength detection sensor 21, and in general, the signal strength detection sensor 21 is installed on the casing of the tuner, for detecting the strength of satellite signals received by the tuner, when the satellite signals are weak, the ADI signal detection chip 22 detects the satellite signals, and compares the signal with a preset reference value, feeds back the comparison information to the CPU4, the CPU4 receives the feedback information to control the filter selection circuit 23 to open and close, selects different anti-interference filters, respectively, a high frequency filter 24, an intermediate frequency filter 25, and a low frequency filter 26, the high frequency filter 24 is used for filtering the high frequency signal, the intermediate frequency filter 25 is used for filtering the intermediate frequency signal, the low frequency filter 26 is used for filtering the low frequency signal, different filters are adopted for satellite signals with different frequencies, so that the filtering effect is improved, and the electromagnetic interference of other signals is reduced. And finally, outputting the filtered satellite signals through an output module 3 to finish signal detection and improve the output quality of the signals.
As shown in fig. 1, the power supply module 1 includes a power supply 11, a switch control unit 12, and a USB interface 13, which are electrically connected in sequence, and the CPU4 is electrically connected to a control terminal of the switch control unit 12. Specifically, the power supply 11 uses commercial power or a battery to provide power, the switch control unit 12 is electrically connected to the CPU4, and the voltage reduction amplitude of the switch control unit 12 is controlled according to the feedback information of the ADI signal detection chip 22, so as to match different models of tuners.
As shown in fig. 1, the output module 3 includes a signal comparator 31, a demodulation unit 32, and an amplifier 33, wherein an input terminal of the signal comparator 31 is electrically connected to the high frequency filter 24, the intermediate frequency filter 25, and the low frequency filter 26, respectively, and an output terminal of the signal comparator 31 is electrically connected to the amplifier 33 through the demodulation unit 32. Specifically, in the present embodiment, the signal comparator 31 is configured to receive the signals output by the high frequency filter 24, the intermediate frequency filter 25, and the low frequency filter 26, compare the signals with a preset reference quantity, output the signals to the demodulation unit 32, and analyze the signals by the demodulation unit 32, amplify the signals, and output the amplified signals.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (5)
1. A tuner signal detection system, characterized by: including power module, detection module, output module and CPU, detection module includes signal strength detection sensor, ADI signal detection chip, filtering selection circuit, high frequency filter, intermediate frequency filter and low frequency filter, power module is used for giving ADI signal detection chip supplies power for detect satellite signal strength detection sensor is connected with the input electricity of ADI signal detection chip, the output of ADI signal detection chip with filtering selection circuit input electricity is connected, filtering selection circuit's output respectively with high frequency filter, intermediate frequency filter are connected with the low frequency filter input electricity, high frequency filter, intermediate frequency filter are connected with the output module electricity respectively with the low frequency filter output.
2. A tuner signal detection system as claimed in claim 1 wherein: the power supply module comprises a power supply, a switch control unit and a USB interface which are electrically connected in sequence, and the CPU is electrically connected with the control end of the switch control unit.
3. A tuner signal detection system as claimed in claim 2 wherein: the output module comprises a signal comparator, a demodulation unit and an amplifier, wherein the input end of the signal comparator is electrically connected with the high-frequency filter, the intermediate-frequency filter and the low-frequency filter respectively, and the output end of the signal comparator is electrically connected with the amplifier through the demodulation unit.
4. A tuner signal detection system as claimed in claim 1 wherein: the CPU model is ARMCortex-A9.
5. A tuner signal detection system as claimed in claim 1 wherein: the ADI signal detection chip is ADP8866 ACPZ-R7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020029493.2U CN210927851U (en) | 2020-01-08 | 2020-01-08 | Tuner signal detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020029493.2U CN210927851U (en) | 2020-01-08 | 2020-01-08 | Tuner signal detection system |
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| Publication Number | Publication Date |
|---|---|
| CN210927851U true CN210927851U (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020029493.2U Expired - Fee Related CN210927851U (en) | 2020-01-08 | 2020-01-08 | Tuner signal detection system |
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| CN (1) | CN210927851U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113645461A (en) * | 2021-07-08 | 2021-11-12 | 浙江盛洋科技股份有限公司 | Novel tuner test circuit and test fixture |
-
2020
- 2020-01-08 CN CN202020029493.2U patent/CN210927851U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113645461A (en) * | 2021-07-08 | 2021-11-12 | 浙江盛洋科技股份有限公司 | Novel tuner test circuit and test fixture |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200703 |