CN102404604A - Apparatus for measuring cable digital television signals - Google Patents
Apparatus for measuring cable digital television signals Download PDFInfo
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- CN102404604A CN102404604A CN2011104029289A CN201110402928A CN102404604A CN 102404604 A CN102404604 A CN 102404604A CN 2011104029289 A CN2011104029289 A CN 2011104029289A CN 201110402928 A CN201110402928 A CN 201110402928A CN 102404604 A CN102404604 A CN 102404604A
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Abstract
The invention provides an apparatus for measuring cable digital television signals, which comprises a power supply module, an audio/video input output module, a CPU (Central Processing Unit), a memory module and a signal inputting and decoding module; the power supply module is used for providing power for other modules of the apparatus for measuring the cable digital television signals; the audio/video input output module comprises a 5150IC (integrated circuit), a display screen for displaying a video signal and an RCA (Radio Corporation of American) interface for receiving the external audio/video signal and transmitting the audio/video signal to the 5150IC; the signal inputting and decoding module comprises a tuner and a demodulator which are connected by a signal; the tuner is used for receiving a tuning signal and transmitting the tuning signal to the demodulator; the demodulator is used for calculating various parameters of the tuning signal, searching and decoding the tuning signal and transmitting the tuning signal to the CPU; and the CPU is connected with the demodulator and the 5150IC by signals through an IIC (Inter-integrated Circuit) bus. The apparatus for measuring cable digital television signals has the advantages of wide application and convenient use.
Description
Technical field
The present invention relates to the digital television techniques field, be specifically related to a kind of digital catv signal measuring instrument that is used for digital catv signal is measured, installs, detected debugging and portable TV reception.
Background technology
Current society is along with cable digital TV popularizes, and the number of users of cable digital TV increases sharply, and the thing followed to the debugging of digital catv signal, is installed, and measuring becomes extremely hard work.And the adjusting instrument that numerous staff use, for example field intensity meter is simply equipped, and weak effect can not be intuitively, the visual display measurement result.
Summary of the invention
In view of this; Be necessary to be directed against the problem that background technology is mentioned, a kind of measure signal intensity accurately be provided, quality; BER; The exact value of MER. frequency spectrum that can also the shows signal full frequency band, and the planisphere of each program or frequency can also directly search and watch the digital catv signal measuring instrument of all cable digital TV programs.
The present invention realizes through following technical scheme:
A kind of digital catv signal measuring instrument; It comprises power module, audio frequency and video input/output module, central processing unit, memory module, signal input and decoder module; Said power module is used to other module for power supply of said digital catv signal measuring instrument, and said audio frequency and video input/output module comprises that display screen and that a 5150IC, is used for display video signal is used to receive outside audio-video signal and this audio-video signal transferred to the RCA interface of said 5150IC; Said signal input comprises the tuner device that signal is connected with decoder module; Said tuner is used to receive harmonic ringing and this harmonic ringing is transferred to said demodulator; Said demodulator is used to calculate the various parameters of said harmonic ringing; And harmonic ringing searched for decoding, transfer harmonic ringing to TS and spread into said central processing unit; Said central processing unit is connected with said demodulator and said 5150IC signal through iic bus, and said central processing unit is used for solving the audio frequency and video television programme data from the TS stream that receives, and outputs to said 5150IC through the CVBS interface; Said memory module is connected with said central processing unit signal.
Said digital catv signal measuring instrument also comprises USB interface.
Said 5150 IC are shown to said display screen with vision signal through the output of BT656 interface.
Said memory module comprises a synchronous dynamic random access memory and a FLASH module, and the frequency of said synchronous DRAM is 256MB, and the frequency of said FLASH module is 32Mb.
Said memory module comprises a synchronous dynamic random access memory, and its frequency is 256MB.
The range of receiving of said tuner is 44MHZ-864MHZ, and the signal strength signal intensity identification range is-65dBm-25dBm.
The external 12.6V power supply of said power module.
Said power module comprises an external mains switch, carries the macro-energy storage battery, also comprises a short-circuit protection circuit.
Compared with prior art, the present invention possesses following advantage:
The present invention can not only accurate measurement signals intensity, quality, BER, MER, signal parameters such as SNR. and frequency spectrum that can also the shows signal full frequency band, and the planisphere of each program or frequency can also directly search and watch all cable digital TV programs; In addition, can also record and playback program, the identification USB flash disk is play the audio frequency in the USB flash disk, and picture through the USB flash disk automatic software update, is uploaded the preservation data, preserves screenshot capture; And, can also obtain complete, original data transmission stream (TS) after the signal demodulation, supply the digital television techniques research staff use of analyzing and researching.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Embodiment
As shown in Figure 1, the digital catv signal measuring instrument of the embodiment of the invention comprise power module, audio frequency and video input/output module, central processing unit (Central Processing Unit, CPU), memory module, signal input and decoder module.
Described power module (POWER BLOCK) is used to other module for power supply of said digital catv signal measuring instrument, and its input voltage is 12.6V, and it comprises an external mains switch, carries the macro-energy storage battery; Also comprise a short-circuit protection circuit.
Said audio frequency and video input/output module; Comprise a 5150IC, a LCD and a RCA interface; Said 5150IC is connected with said RCA interface signal; Audio-video signal through the input of RCA interface can transfer to said 5150IC, and said 5150IC is connected with said LCD signal, and said 5150 IC are shown to lcd screen with video through the output of BT656 interface.
Said CPU is connected with Demod and 5150IC signal through iic bus.
Memory module; Comprise SDRAM (Synchronous Dynamic Random Access Memory, synchronous DRAM) the FLASH module that module and is connected with this SDRAM module, said SDRAM module is connected with said cpu signal; Its frequency is 256MB; This two module is used to store whole system software, and start shooting logo, bitmap, also can supply the tabulation of user storage frequency, the rendition list.
Signal input and decoder module comprise tuner (Tuner) and demodulator (Demod) that signal connects, and the range of receiving of Tuner is 44MHZ-864MHZ, signal strength signal intensity identification range-65dBm-25dBm; Tuner and Demod signal connect, and can guarantee measure signal intensity accurately, quality, BER, the exact value of MER. and the frequency spectrum of signal full frequency band shows, accurately draws the planisphere of each program or frequency.
3.5 inches of the gravel size decisions of said LCD.
At first external 12.6V power supply perhaps uses the powered battery that carries of said power module; After said mains switch start, CPU is through the 5150IC in the input of iic bus control signal and decoder module (Demod and Tuner) and the audio frequency and video input/output module; After the Tuner termination is gone into holding wire; Tuner carries out frequency conversion through frequency changer circuit to signal; Obtain intermediate frequency (IF) signal and export said demodulator (Demod) to, Demod demodulates original data stream (TS) after the input intermediate-freuqncy signal is carried out a series of actions such as phase-detection, carrier wave recovery, A/D conversion, channel demodulation and error correction; And detecting and calculate the various parameters of the signal of surveying in detail, TS spreads into CPU; CPU further solves television programme data such as audio frequency and video from TS stream; And output to the audio frequency and video input/output module through the CVBS interface; 5150 IC are shown to lcd screen with video through the output of BT656 interface, and audio frequency spreads out of through loud speaker, and the user gets final product watch programs.If carry out frequency spectrum, signal strength signal intensity, BER, MER, signal parameters such as planisphere are measured, and the software systems of measuring instrument self can be shown to the precise information of obtaining and calculating reflection strictly according to the facts on the screen, let the user be convenient to use.
When the outside audio frequency and video input signal of RCA interface access, this equipment can be worked as small-sized TV terminal and used; In addition; Said digital catv signal measuring instrument also comprises one or more USB interfaces; Can insert USB flash disk through said USB interface, the TS code stream is carried out original recording, make things convenient for the user that the TS stream information is is further researched and analysed; Perhaps convert general multimedia form to and record, let the user is arbitrary to be watched in broadcasts such as computer, mobile phones.
Through said USB interface, simultaneously can play different multimedia videos, music, photo or the like, file format is such as MPEG, MP3, FLV, 3GP, AVI, JPG, BMP, PNG or the like.
Said memory module can also comprise and includes only a SDRAM module.
The present invention's digital catv signal measuring instrument can not only accurate measurement signals intensity, quality, BER; MER; Signal parameters such as SNR. frequency spectrum that can also the shows signal full frequency band, and the planisphere of each program or frequency can also directly search and watch all cable digital TV programs; In addition, can also record and playback program, the identification USB flash disk is play the audio frequency in the USB flash disk, and picture through the USB flash disk automatic software update, is uploaded the preservation data, preserves screenshot capture; And, can also obtain complete, original data transmission stream (TS) after the signal demodulation, supply the digital television techniques research staff use of analyzing and researching.
The range of application of the present invention's digital catv signal measuring instrument comprises: at first for vast cable digital TV staff, be they at commissioning device, the indispensable instrument in the installation and maintenance cable TV network; Next is=for vast digital cable customers and fan; This portable set is arranged; They not only can need not professional's help and debug the cabled digital signal voluntarily; Can also be used for searching for as domestic consumer and watch program, record and preserve own favorite program, grabgraf, listen to the music or the like; Be exactly research staff in addition, as researcher's measuring instrument, aid for digital television techniques.
Claims (8)
1. digital catv signal measuring instrument; It is characterized in that: it comprises power module, audio frequency and video input/output module, central processing unit, memory module, signal input and decoder module; Said power module is used to other module for power supply of said digital catv signal measuring instrument, and said audio frequency and video input/output module comprises that display screen and that a 5150IC, is used for display video signal is used to receive outside audio-video signal and this audio-video signal transferred to the RCA interface of said 5150IC; Said signal input comprises the tuner device that signal is connected with decoder module; Said tuner is used to receive harmonic ringing and this harmonic ringing is transferred to said demodulator; Said demodulator is used to calculate the various parameters of said harmonic ringing; And harmonic ringing searched for decoding, transfer harmonic ringing to TS and spread into said central processing unit; Said central processing unit is connected with said demodulator and said 5150IC signal through iic bus, and said central processing unit is used for solving the audio frequency and video television programme data from the TS stream that receives, and outputs to said 5150IC through the CVBS interface; Said memory module is connected with said central processing unit signal.
2. digital catv signal measuring instrument according to claim 1 is characterized in that: said 5150 IC are shown to said display screen with vision signal through the output of BT656 interface.
3. digital catv signal measuring instrument according to claim 1; It is characterized in that: said memory module comprises a synchronous dynamic random access memory and a FLASH module that is connected with this synchronous DRAM; The frequency of said synchronous DRAM is 256MB, and the frequency of said FLASH module is 32Mb.
4. digital catv signal measuring instrument according to claim 1 is characterized in that: said memory module comprises a synchronous dynamic random access memory, and its frequency is 256MB.
5. digital catv signal measuring instrument according to claim 1 is characterized in that: the range of receiving of said tuner is 44MHZ-864MHZ, and the signal strength signal intensity identification range is-65dBm-25dBm.
6. digital catv signal measuring instrument according to claim 1 is characterized in that: said power module comprises an external mains switch, carries the macro-energy storage battery, also comprises a short-circuit protection circuit.
7. digital catv signal measuring instrument according to claim 1 is characterized in that: said digital catv signal measuring instrument also comprises USB interface.
8. digital catv signal measuring instrument according to claim 1 is characterized in that: the external 12.6V power supply of said power module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110402928.9A CN102404604B (en) | 2011-12-07 | 2011-12-07 | Apparatus for measuring cable digital television signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110402928.9A CN102404604B (en) | 2011-12-07 | 2011-12-07 | Apparatus for measuring cable digital television signals |
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| Publication Number | Publication Date |
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| CN102404604A true CN102404604A (en) | 2012-04-04 |
| CN102404604B CN102404604B (en) | 2014-03-26 |
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| CN201110402928.9A Active CN102404604B (en) | 2011-12-07 | 2011-12-07 | Apparatus for measuring cable digital television signals |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841414A (en) * | 2014-03-18 | 2014-06-04 | 珠海迈科电子科技有限公司 | Portable multifunctional signal measuring instrument for digital broadcasting television |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201353730Y (en) * | 2008-12-16 | 2009-12-02 | 江苏锋泰钻石工具制造有限公司 | Porous skewed tooth abrasive wheel |
| CN101951473A (en) * | 2010-09-08 | 2011-01-19 | 深圳金亚太科技有限公司 | Computer receiving device for digital television |
| CN102238412A (en) * | 2010-04-29 | 2011-11-09 | 吉林省龙阁视听有限责任公司 | Cable digital television monitor based on USB (universal serial bus) interface |
-
2011
- 2011-12-07 CN CN201110402928.9A patent/CN102404604B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201353730Y (en) * | 2008-12-16 | 2009-12-02 | 江苏锋泰钻石工具制造有限公司 | Porous skewed tooth abrasive wheel |
| CN102238412A (en) * | 2010-04-29 | 2011-11-09 | 吉林省龙阁视听有限责任公司 | Cable digital television monitor based on USB (universal serial bus) interface |
| CN101951473A (en) * | 2010-09-08 | 2011-01-19 | 深圳金亚太科技有限公司 | Computer receiving device for digital television |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841414A (en) * | 2014-03-18 | 2014-06-04 | 珠海迈科电子科技有限公司 | Portable multifunctional signal measuring instrument for digital broadcasting television |
| CN103841414B (en) * | 2014-03-18 | 2016-04-13 | 珠海迈科智能科技股份有限公司 | A kind of portable multi-function digital broadcasting-television signal measuring instrument |
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| Publication number | Publication date |
|---|---|
| CN102404604B (en) | 2014-03-26 |
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Owner name: ZHUHAI MAIKE INTELLIGENT TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ZHUHAI GOTECH ELECTRONIC TECHNOLOGY CO., LTD. |
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Address after: 519000 Guangdong city in Zhuhai Province town of Red Bay Area Yongda Road No. 66 No. 2 building Patentee after: ZHUHAI MAIKE INTELLIGENT TECHNOLOGY CO., LTD. Address before: 519090 Guangdong city in Zhuhai Province town of Red Bay Area Yongda Road No. 66 Patentee before: Zhuhai Gotech Electronic Technology Co., Ltd. |