CN201063051Y - Device for testing high-frequency electronic tuner - Google Patents
Device for testing high-frequency electronic tuner Download PDFInfo
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- CN201063051Y CN201063051Y CNU2007201540695U CN200720154069U CN201063051Y CN 201063051 Y CN201063051 Y CN 201063051Y CN U2007201540695 U CNU2007201540695 U CN U2007201540695U CN 200720154069 U CN200720154069 U CN 200720154069U CN 201063051 Y CN201063051 Y CN 201063051Y
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- 238000012360 testing method Methods 0.000 title claims abstract description 31
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Abstract
The utility model provides a high frequency electronic tuner testing device, comprising a user interface module used for receiving operation control instruction from the user and/or testing information feedback, a processing module that controls according to the operation control instruction the high frequency electronic tuner to be tested and/or a signal receiving module that is used for receiving operation control instruction from the user and for sending the operation control instruction to the processing module. The high frequency electronic tuner testing device provided by the utility model is compatible with simulated high frequency electronic tuner of various brands and modes, such as LG, Samsung, Sharp, Xuguang, Turner, etc., and can complete testing of a plurality of kinds of indexes and basically reflect performance of high frequency electronic tuners; low cost and simple operation are also the advantages of the high frequency electronic tuner testing device provided by the utility model.
Description
Technical field
The utility model relates to the high-frequency electronic tuner field tests, particularly the high-frequency electronic tuner proving installation.
Background technology
Existing simulation high-frequency electronic tuner is promptly simulated tuner and generally is made up of several parts such as input circuit, radio-frequency amplifier, local oscillator and frequency mixer, its structural drawing is seen shown in Figure 1, the high-frequency TV signal of the required reception of input circuit primary election is realized feeder line and high matched impedance of putting; Radio-frequency amplifier tentatively amplifies the high-frequency TV signal that input is come in; Local oscillator produces a constant amplitude sine-wave oscillation than the high 38MHZ of vision carrier frequency signal that receives high-frequency TV signal all the time, supplies with frequency mixer, remains the tracking to high-frequency TV signal; Frequency mixer is put signal that grade TV signal and local oscillator send here with height, and to go out modulation condition through the mixing beat constant and carrier frequency is reduced to fixing medium-frequency TV signal.
At present the test of simulation high-frequency electronic tuner performance index is generally adopted the professional test instrument, the DS7720/DS7730 series of Tianjin De Li instrument company.The professional test instrument has reliability height, precision advantages of higher but costs an arm and a leg, for not being the manufacturer that produces high-frequency electronic tuner specially or do not need high-frequency electronic tuner is carried out high precision measurement, use the professional test instrument can increase R﹠D costs greatly, also be unfavorable for promoting the use of.
Summary of the invention
The purpose of this utility model provides a kind of high-frequency electronic tuner proving installation.
The utility model provides a kind of high-frequency electronic tuner proving installation, comprise the Subscriber Interface Module SIM that is used to receive user's operation control command and/or feedback test information, control the processing module of high-frequency electronic tuner to be measured according to operation control command, and/or the signal receiving module that is used to receive user's operation control command and sends processing module to.
Above-mentioned proving installation also comprises the output signal that receives high-frequency electronic tuner to be measured, sends the video interface module that video playback apparatus is play to.
Above-mentioned signal receiving module is the infrared signal receiver module, and proving installation also comprises Infrared remote controller, and the infrared signal receiver module is sent to processing module after being used to receive the infrared signal that telepilot sends.
Above-mentioned proving installation comprises the corresponding audio frequency and video index of the automatic range of control of frequency coverage, AGC, neighboring trace rejection ratio, each frequency range of channel coverage, the corresponding frequency of frequency range to the test specification of high-frequency electronic tuner to be measured.
Above-mentioned high-frequency electronic tuner to be measured welds respectively or is fixed on the high-frequency electronic tuner proving installation, and high-frequency electronic tuner to be measured is connected by track or lead with processing module.Above-mentioned processing module also can be connected with high-frequency electronic tuner to be measured by at least one deck, and the respectively corresponding at least a high-frequency electronic tuner to be measured of at least one deck inserts corresponding deck with high-frequency electronic tuner to be measured, and foundation is connected with processing module.Processing module can also be connected with at least a high-frequency electronic tuner to be measured by deck, adjusts deck according to different high-frequency electronic tuners to be measured, and foundation is connected with processing module.
The simulation high-frequency electronic tuner of multiple model brands such as the high-frequency electronic tuner proving installation that the utility model provides can compatible LG, SAMSUNG, SHARP, rising sun light, Tener, can finish the test of multiple parameter index, can reflect the performance of simulating high-frequency electronic tuner substantially, with low cost, simple to operate.
Description of drawings
Fig. 1 is the structural representation of simulation high-frequency electronic tuner in the prior art;
Fig. 2 is the structural representation of the utility model first embodiment;
Fig. 3 is the video signal output circuit synoptic diagram of the utility model first embodiment;
Fig. 4 is the power supply plan synoptic diagram of the utility model first embodiment;
Fig. 5 is the workflow synoptic diagram of the utility model first embodiment.
The realization of the utility model purpose, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
With reference to Fig. 2, the structural representation of the utility model first embodiment is shown, 10 pairs of high-frequency electronic tuners 20 to be measured of the proving installation of present embodiment are controlled, and according to the output signal of high-frequency electronic tuner 20 to be measured it are tested.Proving installation 10 comprises processing module 101, video interface module 102, Subscriber Interface Module SIM 103 and signal receiving module 104, processing module 101 receives user's operation and control command from Subscriber Interface Module SIM 103 or signal receiving module 104, adjust the RF signal that signal generator 30 sends in view of the above, high-frequency electronic tuner 20 to be measured produces output signal according to the RF signal and outputs to video playback apparatus 40 broadcasts through video interface module 102.
Preferably, the processing module 101 of present embodiment adopts the AT89C2051 chip, and Subscriber Interface Module SIM 103 selects for use keyboard as input equipment, and keyboard scanning circuit adopts the circulation dynamic scan mode to realize.
Present embodiment also comprises supporting telepilot, and the user carries out operations such as channel selection to telepilot, and signal receiving module 104 receives the signal that telepilot sends, and obtains user's operation and control command in view of the above.Preferably, 104 of telepilot and signal receiving modules adopt infrared signal to communicate, and signal receiving module 104 is provided with infrared receiving circuit, and this infrared receiving circuit adopts interrupt mode to realize.Utilize action key or Infrared remote controller to realize the channel selection function.
The SCL terminal of each high-frequency electronic tuner 20 to be measured and SDA terminal are that the P1.6 of AT89C2051 chip is connected with the P1.7 pin with the I/O pin of processing module 101 respectively.The AS terminal ground connection of each high-frequency electronic tuner 20 to be measured, i.e. corresponding address bit MA0 in software programming, MA1 is 00.High-frequency electronic tuner 20 to be measured through in adopt the DC coupling way of output that vision signal is exported to video playback apparatus 40 after putting demodulation, wherein the vision signal employing is 8MZ by frequency, characteristic impedance is to export to video playback apparatus 40 after the π type filtering circuit filtering of 75 Ω, and the video signal output circuit synoptic diagram is referring to Fig. 3.
Present embodiment comes Simulation with I with the I/O pin of processing module 101
2The C bus is carried out frequency locking, the frequency range of adjustment signal generator 30, the frequency range of frequency, signal intensity etc., test the indexs such as the automatic range of control of frequency coverage, AGC, neighboring trace rejection ratio of channel coverage, the corresponding frequency of each frequency range of high-frequency electronic tuner 20 to be measured with the situation of change of parameter adjustment by observing video playback apparatus 40 video pictures, utilize video analyzer to test the audio frequency and video index of each frequency range in addition.
In the present embodiment, each high-frequency electronic tuner 20 to be measured is connected by deck with feed circuit with the processing module 101 of proving installation, the present embodiment design has the deck of a plurality of difformities and structure, the high-frequency electronic tuner to be measured 20 of respectively corresponding multiple different make and types.High-frequency electronic tuner 20 to be measured is inserted in the corresponding deck and the SCL terminal of high-frequency electronic tuner to be measured can be connected with the corresponding output signal terminal of processing module 101 with the SDA terminal, and the power supply terminal of high-frequency electronic tuner 20 to be measured can be connected with the corresponding power supply terminal of feed circuit.
Present embodiment also can be made the circuit board form with proving installation 10, with high-frequency electronic tuner to be measured 20 welding of a plurality of different make and types or be fixed on the printed circuit board (PCB) of described proving installation 10, track by printed circuit board (PCB) or lead are connected with the SDA terminal SCL terminal of each high-frequency electronic tuner 20 to be measured with the corresponding output signal terminal of processing module 101 respectively.
For realizing to the test of multiple different high-frequency electronic tuners 20 and satisfy ripple and suppress requirement that present embodiment proposes power supply plan as shown in Figure 4.
The power supply plan of present embodiment comprises the first power conversion module 111, second source conversion module 112 and the 3rd power conversion module 113, described first power conversion module 111 and second source conversion module 112 be the power supply of reception+12V respectively, and be transformed to respectively+32V and+6.5V output.The 3rd power conversion module 113 general+6.5V voltage transformations are exported to a plurality of high-frequency electronic tuners to be measured 20 and processing module 101 respectively for+5V.Present embodiment adopts ripe DC-DC reduction voltage circuit as realizing second source conversion module 112, and ripe linear voltage stabilization modular circuit realizes the 3rd power conversion module 113; And adopt ripe DC-DC booster circuit to realize the first power conversion module 111.Preferably, the first power conversion module 111 and second source conversion module 112 adopt MC34063, and the 3rd power conversion module 113 adopts LD1117.In addition because high-frequency electronic tuner 20 to be measured requires than higher for+5V operating voltage, preferably, each high-frequency electronic tuner to be measured+the 5V power supply terminal connects the patch capacitor of 10UF with the reinforcement filter effect.
The workflow of the proving installation of present embodiment as shown in Figure 5, proving installation 10 carries out with after high-frequency electronic tuner 20 to be measured is connected:
Above-mentioned flow process repeats, the user after sending operation and control command adjustment frequency locking information and standard information at every turn, by observing the video output situation of video playback apparatus, when the many index of judging high-frequency electronic tuner 20 to be measured changes in much scopes, can influence the result of broadcast of video playback apparatus, obtain the The performance test results of high-frequency electronic tuner 20 to be measured in view of the above.Above-mentioned many index includes but not limited to the automatic range of control of frequency coverage, AGC, neighboring trace rejection ratio of channel coverage, the corresponding frequency of each frequency range etc.Utilize video analyzer VM700 to test the audio frequency and video index of high-frequency electronic tuner 20 each frequency range to be measured in addition.Specifically, present embodiment can carry out following several test:
Test the frequency coverage of high-frequency electronic tuner 20 receiving channelss to be measured: the RF signal frequency range of conditioning signal generator 30, observe video playback apparatus 40 video pictures, according to the video pictures situation of change draw and write down can locked frequency point low-limit frequency and highest frequency, promptly record the frequency coverage of high-frequency electronic tuner 20 to be measured.
Survey the coverage of the corresponding frequency of each frequency range: because the high-frequency electronic tuner frequency range is divided into VHFL, VHFH, the UHF section, the several frequencies of each Frequency Band Selection at the RF signal, frequency to each frequency is finely tuned, observed frequency can influence the video pictures of video playback apparatus 40 when changing in much scopes, write down the scope of this frequency trim, promptly records the coverage of high-frequency electronic tuner 20 frequencies to be measured.
Survey high-frequency electronic tuner 20 each band A GC range of AGC to be measured: at the several frequencies of each Frequency Band Selection of RF signal, the RF signal intensity of conditioning signal generator 30, observed frequency can influence the video pictures of video playback apparatus 40 when changing in much scopes, write down RF Signal Regulation scope, promptly record the AGC range of control of high-frequency electronic tuner 20 to be measured.
Survey the monkey chatter of each frequency range of high-frequency electronic tuner 20 to be measured: this test adopts two paths of signals generator and a two-way to import one tunnel mixer of exporting.At the several frequencies of each Frequency Band Selection, No. one signal generator to be fixed a channel export to mixer, another road signal generator produces adjacent channel (signal of N ± 1CH).Regulate the RF signal intensity of adjacent channel, observe when changing in the much scopes of RF signal intensity, can the video pictures of video playback apparatus 40 receiving channelss be exerted an influence.Write down RF Signal Regulation scope, promptly record the neighboring trace rejection ratio of high-frequency electronic tuner 20 to be measured.
Survey the audio frequency and video index of high-frequency electronic tuner 20 each frequency range to be measured: the several frequencies of each Frequency Band Selection, the audio frequency and video index of testing high-frequency electronic tuner 20 each frequency to be measured with the VM700 video analyzer.
In the above-mentioned flow process, be meant the standard of the frequency point information that analog tuner receives, comprise a kind of in N system, PAL-system, the SECAM-system to the standard information of high frequency analog tuner to be measured 20 outputs.
On the foregoing description basis,, the utility model proposes second embodiment for further improving the dirigibility of proving installation and compatibility to different high-frequency electronic tuners 20 to be measured.
Present embodiment proving installation 10 comprises processing module 101, video interface module 102, Subscriber Interface Module SIM 103 and signal receiving module 104.
The Subscriber Interface Module SIM 103 of present embodiment selects for use button as input equipment, and the acceptance test control command also sends processing module 101 to; Adopt LCDs or charactron as output device, to user feedback test operation command context or test operation situation.
Signal annexation between the structure of the processing module 101 of the proving installation 10 of present embodiment, video interface module 102 and signal receiving module 104, proving installation 10 and the high-frequency electronic tuner to be measured 20, the design of the power supply of proving installation 10 and first embodiment are similar, so do not give unnecessary details.
The high-frequency electronic tuner to be measured of present embodiment is connected by deck with feed circuit with the processing module 101 of proving installation.Present embodiment adopts the deck with armature contact to adapt to multiple high-frequency electronic tuner to be measured 20.A plurality of contacts of this deck can be adjusted according to the high-frequency electronic tuner to be measured 20 of multiple different make and types, the SCL terminal of high-frequency electronic tuner 20 to be measured and the corresponding output signal terminal of SDA terminal and processing module 101 are coupled together, and the power supply terminal of high-frequency electronic tuner 20 to be measured and the corresponding power supply terminal of feed circuit can be coupled together.In addition, present embodiment can also be selected a deck that has contact switch for use, and a plurality of contacts of this deck have the break-make of switch with control contact electric signal respectively.Behind high-frequency electronic tuner 20 these decks of insertion to be measured, closed pair is answered the SCL terminal of high-frequency electronic tuner 20 to be measured and the contact switch of SDA terminal, and its signal can be coupled together with the corresponding output signal terminal of processing module 101; Closed pair is answered the contact switch of high-frequency electronic tuner 20 power supply terminals to be measured, and it can be coupled together with the corresponding power supply terminal of feed circuit; Disconnect other contact switchs, make that other terminals are unsettled, realize being connected high-frequency electronic tuner 20 to be measured and processing module 101 and feed circuit.
The workflow of the test platform of present embodiment and a last embodiment are similar, and test index and concrete test process are also similar with a last embodiment, so do not give unnecessary details.
The above only is a preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (10)
1. a high-frequency electronic tuner proving installation is characterized in that, comprising:
Be used to receive the Subscriber Interface Module SIM of user's operation control command and/or feedback test information,
Control the processing module of high-frequency electronic tuner to be measured according to described operation control command,
And/or the signal receiving module that is used to receive user's operation control command and sends described processing module to.
2. proving installation according to claim 1 is characterized in that, also comprises the output signal that receives described high-frequency electronic tuner to be measured, sends the video interface module that video playback apparatus is play to.
3. proving installation according to claim 1, it is characterized in that, described signal receiving module is the infrared signal receiver module, and described proving installation also comprises Infrared remote controller, and the infrared signal receiver module is sent to processing module after being used to receive the infrared signal that telepilot sends.
4. proving installation according to claim 1 is characterized in that, also comprises the feed circuit that multiple supply voltage is provided, for different high-frequency electronic tuners to be measured provides different supply voltages.
5. proving installation according to claim 1 is characterized in that, described processing module adopts the AT89C2051 chip.
6. proving installation according to claim 1 is characterized in that, described Subscriber Interface Module SIM adopts one or more input equipments in button, the keyboard, adopts one or more output devices in LCD screen or the charactron.
7. according to any described proving installation of claim of claim 1 to 6, it is characterized in that described proving installation comprises the corresponding audio frequency and video index of the automatic range of control of frequency coverage, AGC, neighboring trace rejection ratio, each frequency range of channel coverage, the corresponding frequency of frequency range to the test specification of high-frequency electronic tuner to be measured.
8. according to any described proving installation of claim of claim 1 to 6, it is characterized in that, described high-frequency electronic tuner to be measured welds respectively or is fixed on the described high-frequency electronic tuner proving installation, and high-frequency electronic tuner to be measured is connected by track or lead with described processing module.
9. according to any described proving installation of claim of claim 1 to 6, it is characterized in that, described processing module is connected with described high-frequency electronic tuner to be measured by at least one deck, the respectively corresponding at least a high-frequency electronic tuner to be measured of described at least one deck, high-frequency electronic tuner to be measured is inserted corresponding deck, and foundation is connected with described processing module.
10. according to any described proving installation of claim of claim 1 to 6, it is characterized in that, described processing module is connected with at least a high-frequency electronic tuner to be measured by deck, adjust described deck according to different high-frequency electronic tuners to be measured, foundation is connected with described processing module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201540695U CN201063051Y (en) | 2007-06-06 | 2007-06-06 | Device for testing high-frequency electronic tuner |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007201540695U CN201063051Y (en) | 2007-06-06 | 2007-06-06 | Device for testing high-frequency electronic tuner |
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| CN201063051Y true CN201063051Y (en) | 2008-05-21 |
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| CNU2007201540695U Expired - Fee Related CN201063051Y (en) | 2007-06-06 | 2007-06-06 | Device for testing high-frequency electronic tuner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106973342A (en) * | 2017-03-21 | 2017-07-21 | 合肥极友软件开发有限公司 | Vehicle audio tuner adjust automatically detecting system based on I2C buses |
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2007
- 2007-06-06 CN CNU2007201540695U patent/CN201063051Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106973342A (en) * | 2017-03-21 | 2017-07-21 | 合肥极友软件开发有限公司 | Vehicle audio tuner adjust automatically detecting system based on I2C buses |
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