CN1641593A - Computer interface measuring tool and its measuring method - Google Patents
Computer interface measuring tool and its measuring method Download PDFInfo
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- CN1641593A CN1641593A CN 200410000658 CN200410000658A CN1641593A CN 1641593 A CN1641593 A CN 1641593A CN 200410000658 CN200410000658 CN 200410000658 CN 200410000658 A CN200410000658 A CN 200410000658A CN 1641593 A CN1641593 A CN 1641593A
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Abstract
The invention relates to a computer interface testing tool and testing method. The collection signal is inputted into computer through the output of collection video interface signal and other communication interface to complete the integrated testing of computer interface. The tool comprises a A/D converter used to receive analog signal from computer video interface and change it into digital signal, a SBC used to receive impulse signal from computer video interface and control receiving digital signal from the A/D converter and a output level converter used to receive the output signal from SBC and transform it into the level corresponding to computer communication interface to communicate with computer.
Description
Technical field
The present invention relates to a kind of testing tool and method of testing, relate in particular to a kind of testing tool and method of testing thereof of computer interface.
Background technology
Computer interface is the interface that computing machine connects miscellaneous equipment, and the quality of video interface is the display effect of display device directly.Show the field at computer picture, nowadays many application still need to adopt technology maturation reliable quality graphoscope just can reach optimal display result, cathode ray tube (CRT) is still most important product in the present personal computer accessory, the image that for example professional graphic designs or precision are very high shows, quick acting type game and high-speed motion content etc. remain and can obtain best visual effect on CRT monitor.Because the appearance of plane display technique, the problem of past sphere CRT picture distortion is solved, and more makes CRT market present the situation that is a splendid legacy.Because technology is full maturity, the CRT market price drops day by day, and the volume production scale also grows stronger day by day.
On computer line, whether can operate as normal for the video interface of test computer, the method that adopts is earlier display device to be connected on the computing machine usually, then by manually with eyes the visual effect of display device being judged.The great amount of manpower that this method of testing is not only wasted, and in the test process, also there is no fixed standard in, and the tester works long hours and also causes visual fatigue easily, thereby makes the test job inefficiency.Therefore how computer interface being carried out effectively test automatically, is current problem demanding prompt solution.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of computer interface testing tool and method of testing, and main purpose is to realize that computer interface rapidly and efficiently tests automatically, when saving human cost, improves the efficient of test.
To achieve these goals, the invention provides a kind of computer interface testing tool, export by collecting computer video interface signal, and again the signal of gathering is inputed to computing machine by other communication interface, to finish the integration test of computer interface, its characteristics are that this instrument comprises:
One analog/digital conversion device is a digital signal in order to the analog signal conversion with this computer video interface output;
One single card microcomputer, in order to receiving the pulse signal of this computer video interface output, and control receives the digital signal of this analog/digital conversion device output; And
One output level conversion equipment in order to receiving the output signal of this single card microcomputer, and is converted into the level form that is consistent with the computing machine communication interface, carries out communication with this computing machine.
Above-mentioned computer interface testing tool, its characteristics are that described video interface is the cathode ray interface tube.
Above-mentioned computer interface testing tool, its characteristics are, also comprise a signal separator, in order to the Signal Separation with this video interface output.
Above-mentioned computer interface testing tool, its characteristics are, also comprise an amplifier, link to each other with this analog/digital conversion device, input to this analog/digital conversion device after the simulating signal of this computer video interface output is amplified.
Above-mentioned computer interface testing tool, its characteristics are that the simulating signal of video interface output comprises the RGB voltage signal; The pulse signal of video interface output comprises the synchronous and field sync signal of row.
Above-mentioned computer interface testing tool, its characteristics are that this single card microcomputer also receives the Communication Control signal that comes from this computing machine communication interface, to reply the data transfer request of this communication interface.
Above-mentioned computer interface testing tool, its characteristics are that this computing machine communication interface comprises serial line interface, parallel interface and USB interface.
Above-mentioned computer interface testing tool, its characteristics be, one of parallel interface pin of this single card microcomputer connects ground connection behind the diode by a resistance.
The present invention also provides a kind of computer interface method of testing, exports by gathering the video interface signal, and again the signal of gathering is inputed to computing machine by other communication interface, and to finish the integration test of computer interface, its characteristics are that this method comprises:
By the capable field pulse signal of single card microcomputer receiving computer video interface output, and this pulse signal timing counted to calculate the capable field frequencies range of this video interface;
Receive the RGB analog voltage signal of this video interface output by an analog/digital conversion device, and be converted into digital signal;
Under the control of this single card microcomputer, this digital signal is imported this single card microcomputer; And
The output signal of this single card microcomputer is converted to the level form that is consistent with this computing machine communication interface, and imports in this computing machine by the communication interface of correspondence and to test.
Above-mentioned computer interface method of testing, its characteristics are that described video interface is the cathode ray interface tube.
Above-mentioned computer interface method of testing, its characteristics are, also comprise the step with the Signal Separation of video interface output.
Above-mentioned computer interface method of testing, its characteristics be, before this analog/digital conversion step, also comprises a step that the simulating signal that receives is amplified.
Above-mentioned computer interface method of testing, its characteristics are, also comprise the steps:
This computing machine sends a data transfer request by its communication interface to this single card microcomputer; And
This single card microcomputer begins to transmit data to this computing machine after receiving this request.
Above-mentioned computer interface method of testing, its characteristics are that this computing machine communication interface comprises serial line interface, parallel interface and USB interface.
Computer interface testing tool and the method for testing thereof carried according to the present invention can realize the automatic test of computer interface, not only rapidly and efficiently and also test result stable, when saving human resources, reduced equipment cost.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 a is the pin hole synoptic diagram of video card CRT interface;
Fig. 1 b is the stitch synoptic diagram of display crt cable;
Fig. 2 is the module rack composition of the computer interface testing tool that the present invention carried;
Fig. 3 is the schematic diagram of the computer interface method of testing that the present invention carried;
Fig. 4 is the display cell structure synoptic diagram of the embodiment of the invention;
Fig. 5 is the circuit diagram that the A/D converter of the embodiment of the invention is connected with single card microcomputer;
Fig. 6 is the sequential chart of TLC0834 chip;
Fig. 7 is the circuit diagram that the capable field sync signal of the embodiment of the invention is gathered; And
Fig. 8 is the process flow diagram of computer interface method of testing of the present invention.
Embodiment
Be example with test CRT interface below, the present invention is described in detail.
Why CRT monitor can be luminous, is because the fluorescent powder of the beam bombardment that sends of electron gun to the video screen emits beam fluorescent powder.
The arrangement of CRT interface pin sees also Fig. 1 a and Fig. 1 b, and wherein Fig. 1 a is the pin hole synoptic diagram of video card CRT interface, and Fig. 1 b is the stitch synoptic diagram of display crt cable.Wherein have 15 pins, marked pin 1 among the figure respectively, pin 5, pin 6, pin 10, pin 11, pin 15.The signal of CRT interface is as shown in Table 1:
Table one:
| Pin | Title | Direction | Describe |
| 1 | RED | → | Red?Video(75ohm，0.7V?p-p) |
| 2 | GREEN | → | Green?Video(75ohm，0.7V?p-p) |
| 3 | BLUE | → | Blue?Video(75ohm，0.7V?p-p) |
| 4 | ID2 | ← | Monitor?ID?Bit?2 |
| 5 | GND | — | |
| 6 | RGND | — | Red? |
| 7 | GGND | — | Green? |
| 8 | BGND | — | Blue? |
| 9 | KEY | - | Key(No?pin) |
| 10 | SGND | — | Sync? |
| 11 | ID0 | ← | Monitor?ID?Bit?0 |
| 12 | ID1 | ← | Monitor?ID?Bit?1 |
| 13 | HSYNC | → | Horizontal? |
| 14 | VSYNC | → | Vertical? |
| 15 | ID3 | ← | Monitor?ID?Bit?3 |
As can be seen, the CRT interface is had by the pin of display card output from table one: 1,2,3,13, and No. 14 is respectively red, green, blueness, row is synchronous, field sync signal output.These several signal outputs have determined which type of image display shows just.To test automatically the CRT interface, just need testing tool can survey this five signals, analyze again and judge.
Electron gun very little point (i.e. pixel) on synchronization can only allow video screen is luminous.Why we can see the image of flooding, are that because of the deflection coil in the display by electron beam from left to right from top to down is got on the whole screen, moves in circles so as quick as thought.And the row that sends from display card just synchronously and field sync signal accurately controlling deflection coil, make the electron beam deflecting arrive correct position.Synchronously capable and field synchronization all is to have high level and low level pulse signal.
Synchronously capable and field synchronization is being controlled electron beam and where is being got to; And the redness of sending from display card, green and blue signal are then being controlled the power of getting to red green blue tricolor component on this position.Color signal and synchronizing signal collaborative work, we just can see the image of wanting.Different with synchronizing signal, color signal is the simulating signal that changes can from 0 to 0.7 volt, and the brightness of the high more then respective color of voltage is high more.See also Fig. 2, this figure is the module rack composition of the computer interface testing tool that the present invention carried, and computer interface testing tool of the present invention comprises analog/digital conversion device 210, single card microcomputer 220 and output level conversion equipment 230.Wherein analog/digital conversion device 210 receives the simulating signal of this computer video interface output, and is converted into digital signal.Single card microcomputer 220 receives the pulse signal of this computer video interface output, and control receives the digital signal of this analog/digital conversion device output.Single card microcomputer 220 is connected with an output level conversion equipment 230, and it receives the output signal of this single card microcomputer, and is converted into the level form that is consistent with the computing machine communication interface, carries out communication with this computing machine.
See also Fig. 3, the present invention is responsible for changing screen color by computing machine 301 operation test procedures, controls CRT instrument 302, and analyzes the data that CRT instrument 302 is gathered, and CRT instrument 302 is responsible for sending the data that collect according to computer commands.
The test of CRT interface will be judged the signal of CRT interface output, therefore need row synchronizing field synchronizing signal and these test signals of RGB to gather.Present embodiment utilizes single card microcomputer fabrication techniques instrument to realize collection to test signal seeing also Fig. 3, and this figure is test philosophy figure of the present invention.For the synchronous and such pulse signal of field synchronization of CRT interface 310 row, can gather its signal by the counter in the single card microcomputer 330; And the signal of three colors, because be voltage analog signal, single card microcomputer can't directly be handled, and need gather by A/D converter 340.The function of single card microcomputer 330 built-in serial line interface input and output is so be connected the data of transmission sampling with the serial line interface of single card microcomputer 330 by serial line interface (the Serial Port) 320 of computing machine.The single card microcomputer of present embodiment is the single card microcomputer of AT89C52 model, and it is the core of CRT instrument.AT89C52 has the built-in Flash Memory of 8KB, can deposit and move the single card microcomputer program; Data when the RAM of 256B can storage running, three countings (or regularly) device can be used for the sampling row synchronously and field sync signal, 48 bit parallel interfaces, P0 by name, P1, P2, P3, totally 32 I/O pins can be used for controlling mould/number conversion chip and gather redness, green, and blue signal, it also has a serial channel, but the communication between implementation tool and the computing machine.Single card microcomputer equally also needs crystal oscillator to drive, but machine cycle of MCS-51 series boards machine and be not equal to cycle of crystal oscillator, the cycle that its machine cycle is 12 crystal oscillators.The AT89C52 of present embodiment can support the crystal oscillator of 24MHz, and it can make the AT89C52 single card microcomputer be operated under the frequency of 2MHz.
The A/D converter of present embodiment is the chip with type of serial i/O.Concrete model is TLC0834.TLC0834 has four tunnel simulating signal input channels, can satisfy to redness the collection of green and blue three signals.Its voltage measurement scope is 0 to 5 volt.Because the voltage range of three color signals between 0 to 0.7, in order to improve precision, needed to amplify before carrying out mould/number conversion.Therefore can also comprise an amplifier, it is the LM324N model, and it is the operational amplifier of four channels.
Because the serial line interface of single card microcomputer is a Transistor-Transistor Logic level, and is different with the RS232 level of computing machine.Can not directly carry out communication between the two, also need to connect a level translator.Present embodiment is the MAX232 chip.
In order to make the single card microcomputer program be easy to exploitation and to safeguard that the C language (C51) of having selected MCS-51 series boards machines here for use is as programming language.C51 compiler with Keil company compiles.This compiler is operated in windows platform, and is powerful.The code that compiles out is write with write device among the ROM of single card microcomputer and just can be moved.
The single card microcomputer program compilation is good and be written to after the program internal memory, debugging for convenience, and the P12 pin of single card microcomputer U1 has connected ground connection behind the diode D1 by resistance R 1_3, sees also Fig. 4, and this figure is the synoptic diagram of display unit of the present invention.See following code again:
The compatible single card microcomputer in #include＜reg52.h＞// 8052 is selected different header file sbit LED=P1^2 according to different chips; //C51's is specifically defined, allows LED represent No. 2 pin P12void Start () { the char i=0 of parallel port 1; For (i=0; I＜6; I++) { LED^=1; The value of // switching P12.Be that 0 o'clock this pin is the 0V low level; Be to be 5V high level delay (200) at 1 o'clock; // realize time-delay by circulation }＜!--SIPO＜DP n=" 6 "〉--〉＜dp n=" d6 "/void main () { Start (); For (; ); // single card microcomputer program does not withdraw from.}
This section program can make the diode flicker by the voltage that changes pin.If after connecting circuit, diode can glimmer really, illustrates that single card microcomputer can work.
To the collection of RGB (RGB) signal, in fact be exactly to read the data that mould/the number conversion chip is passed back.Seeing also Fig. 5, is AT89C52 single card microcomputer U1 among the figure, is connected with the circuit of mould/number conversion chip U3 (ADC0834), and ADC0834 is identical with the TLC0834 function that the front is introduced, and the back unification is called 0834.Upper left corner RGB is three color simulating signals after amplifying, and is connected respectively to No. 0 No. 1 and No. 2 simulating signal input channels of 0834.As can be seen from the figure, there are five lines connecting single card microcomputer and 0834.Wherein the CS (Chip Select) that connects of P13 is for sheet selects pin, and there is a horizontal line top of two letters of CS, illustrates that it is that low level is effective, when by single card microcomputer P13 pin 0834 CS pin level by high step-down after, 0834 will enter duty.The CLK (Clock) that P15 connects is used for controlling 0834 job step, and level of the every reception of CLK changes i.e. pulse signal, and 0834 finishes step work.The DI (Data In) that P14 connects is used for receiving control data from single card microcomputer.The DO (Data Out) that P17 connects is used for transmitting the serial digital result to single card microcomputer; This result's form be high-order preceding or low level in the preceding SARS decision that connects by P16.
Sequential chart sees also Fig. 6, and a series of pulse signals that the first line display CLK needs are as the clock period signal.The time length that it should be noted that each cycle can be controlled flexibly by single card microcomputer.The reaction velocity that adapts to mould/number conversion chip.
Second line display needs CS to keep low level in the whole process of 0834 work.
The third line represent when 0834 start working after, preceding four clock period receive the signal of single card microcomputer by DI, the form that cooperates the figure bottom as can be seen: first clock period must be a high level.The level that second period obtains has determined 0834 working method.If high level, 0834 can be the voltage transitions of some simulating signals digital signal.If low level then can be converted to digital signal to the difference of the voltage of certain two simulating signal.Which road simulating signal third and fourth cycle decision gathers.
Fourth line represents how SARS changes level and cooperate conversion work.
Fifth line was illustrated in after free time through the 5th cycle, and since the 6th cycle DO, each cycle sends a digital signal that conversion is good.Its control program is as follows:
#include＜reg52.h＞#include＜stdio.h＞sbit AD_CS=P1^3; Sbit AD_DI=P1^4; Sbit AD_CLK=P1^5; Sbit AD_SARS=P1^6; Sbit AD_DO=P1^7; Void AD_Clock () // to 0834 clock signal { AD_CLK=0; AD_CLK=0; AD_CLK=0; AD_CLK=0; AD_CLK=1; AD_CLK=1; AD_CLK=1; AD_CLK=1; Unsigned char GetValue () { unsigned char sdi=0x0C; // channel 0 with 0834 is example unsigned char sdo=0; Unsigned char i=0;＜!--SIPO＜DP n=" 8 "〉--〉＜dp n=" d8 "/AD_CS=0; // 0834 enters duty for (i=0; I＜4; I++) // send signal { AD_DI=sdi ﹠amp to DI; Amp; 0x08; Audio data AD _ Clock () of // setting DI; After clock signal of // transmission, 0834 can confirm data sdi＜＜=1 of DI; // preparation next bit data } AD_SARS=1; // preparation receives 8 bit data for (i=0 of uimsbf unsigned integer most significant bit first; I＜8; I++) // receive data { AD_Clock () from DO; Sdo＜＜=1 after clock signal of // transmission; Sdo|=(unsigned char) AD_DO; // preservation one digit number certificate } AD_CS=1; // allow 0834 state (abandoning back low level data formerly) the return sdo that deactivates; // return results } void main () { unsigned char value=0; Start (); InitSerial (); // serial line interface initialization function f or (; ) { value=GetValue (); // obtain mould/number conversion printf (" Value=%d n ", (int) value) as a result from 0834; // result is outputed to serial line interface }
AT89C52 has the counter/timer of 3 (No. 0 No. 1 and No. 2) 16.If be used for counting, they can write down the umber of pulse that the external world is input to respective pins; If be used for regularly, they can write down the single card microcomputer machine cycle number of process, notice that the length of machine cycle adopts the frequency of crystal oscillator to determine by single card microcomputer.Have three control bits to determine them with counting mode work or with timing mode work respectively, 0 is timer, and 1 is counter.They have separately a pair ofly forms counter register by the TH of most-significant byte and the TL of least-significant byte, can realize counting/timing function of 16.
Seeing also Fig. 7, fundamentally is a process to outside pulse count signal and timing to the collection of line synchronizing signal H Sync and field sync signal V Sync.In the instrument, the pin of No. 0 and No. 1 counter of single card microcomputer is used for writing down the capable synchronous and field sync signal of CRT respectively.Because row synchronizing frequency (line frequency) is higher than field synchronization frequency (field frequency) far away, can record in the program receive 10 field sync signals during in, can receive what line synchronizing signals, and through time of what machine cycles.Just can calculate the line frequency and the field frequency of CRT interface thus.The communication of instrument and intercomputer is finished by serial line interface, and the baud rate of the two must be consistent.The baud rate of single card microcomputer serial line interface need be provided by timer, and here No. 2 timers have been taken on this task.
In addition, because the instrument of present embodiment itself has the function of serial communication, so it can also be used to the serial line interface function of test computer.Because there are some computing machines not have serial line interface, have only USB interface or parallel interface, so then can select to have support USB output or and the single card microcomputer of line output, or be that present embodiment increases functions such as USB communication, instrument can have the test function of USB interface and parallel interface again concurrently so, it can be expanded to a multifunctional testing instrument like this.
See also Fig. 8, this figure is the process flow diagram of computer interface method of testing of the present invention.As shown in the figure, step 810 is at first passed through the capable field pulse signal that a single card microcomputer receiving computer video interface is exported, and this pulse signal timing is counted to calculate the capable field frequencies range of this video interface; Step 820 receives the RGB analog voltage signal of this video interface output then, and is converted into digital signal by an analog/digital conversion device; Step 830 under the control of this single card microcomputer, is imported this single card microcomputer with this digital signal; Step 840 is converted to the level form that is consistent with this computing machine communication interface with the output signal of this single card microcomputer, and imports in this computing machine by the communication interface of correspondence and to test.
Instrument of the present invention can need not to wait for that computing machine sends instruction to its, and it is acquired signal and the result is sent to computing machine get final product constantly just.But when if computing machine uses Windows XP operating system, instrument connects with computing machine in start, and operating system can become the instrument misidentification serial ports mouse so, and attempts to be its install driver.For addressing this problem, communication modes can be replied formula instead, by the test procedure of computing machine instrument is controlled.Instrument has received after the instruction, just can send data.The communication modes of present embodiment is the formula of replying, and by the test procedure of computing machine instrument is controlled.Instrument has received after the instruction, just can send data.Detailed process is that computing machine passes through its communication interface and sends a data transfer request to this single card microcomputer, and single card microcomputer begins to transmit data to computing machine after receiving this request, thereby realizes the communication of computing machine and instrument.
Simultaneously, technical scheme of the present invention all can realize test for other video interface, reason is: the output signal of TV interface and S-Video interface is compared with the CRT interface, and the R-G-B signals that difference is the CRT interface and row are synchronously, field sync signal separated by different stitch respectively and export.And the signal of the output of TV interface and S-Video interface is the signal that mixes, only need in testing tool, add signal separator, the signal of video interface output is separated, for example utilize the processing television signals chip, can be with the signal of signal decomposition that mixes for separating, next just can handle TV interface and S-Video interface, realize test function TV interface and S-Video interface with the mode of handling the CRT interface.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (14)
1, a kind of computer interface testing tool is exported by collecting computer video interface signal, and again the signal of gathering is inputed to computing machine by other communication interface,, it is characterized in that this instrument comprises to finish the integration test of computer interface:
One analog/digital conversion device is a digital signal in order to the analog signal conversion with this computer video interface output;
One single card microcomputer, in order to receiving the pulse signal of this computer video interface output, and control receives the digital signal of this analog/digital conversion device output; And
One output level conversion equipment in order to receiving the output signal of this single card microcomputer, and is converted into the level form that is consistent with the computing machine communication interface, carries out communication with this computing machine.
2, computer interface testing tool according to claim 1 is characterized in that, described video interface is the cathode ray interface tube.
3, computer interface testing tool according to claim 1 is characterized in that, also comprises a signal separator, in order to the Signal Separation with this video interface output.
4, computer interface testing tool according to claim 1, it is characterized in that, also comprise an amplifier, link to each other, after the simulating signal of this computer video interface output is amplified, input to this analog/digital conversion device with this analog/digital conversion device.
5, computer interface testing tool according to claim 1 is characterized in that, the simulating signal of video interface output comprises the RGB voltage signal; The pulse signal of video interface output comprises the synchronous and field sync signal of row.
6, computer interface testing tool according to claim 1 is characterized in that, this single card microcomputer also receives the Communication Control signal that comes from this computing machine communication interface, to reply the data transfer request of this communication interface.
7, computer interface testing tool according to claim 1 is characterized in that, this computing machine communication interface comprises serial line interface, parallel interface and USB interface.
8, computer interface testing tool according to claim 1 is characterized in that, one of parallel interface pin of this single card microcomputer connects ground connection behind the diode by a resistance.
9, a kind of computer interface method of testing is exported by gathering the video interface signal, and again the signal of gathering is inputed to computing machine by other communication interface,, it is characterized in that this method comprises to finish the integration test of computer interface:
By the capable field pulse signal of single card microcomputer receiving computer video interface output, and this pulse signal timing counted to calculate the capable field frequencies range of this video interface;
Receive the RGB analog voltage signal of this video interface output by an analog/digital conversion device, and be converted into digital signal;
Under the control of this single card microcomputer, this digital signal is imported this single card microcomputer; And
The output signal of this single card microcomputer is converted to the level form that is consistent with this computing machine communication interface, and imports in this computing machine by the communication interface of correspondence and to test.
10, computer interface method of testing according to claim 9 is characterized in that, described video interface is the cathode ray interface tube.
11, computer interface method of testing according to claim 9 is characterized in that, also comprises the step with the Signal Separation of video interface output.
12, computer interface method of testing according to claim 9 is characterized in that, before this analog/digital conversion step, also comprises a step that the simulating signal that receives is amplified.
13, computer interface method of testing according to claim 9 is characterized in that, also comprises the steps:
This computing machine sends a data transfer request by its communication interface to this single card microcomputer; And
This single card microcomputer begins to transmit data to this computing machine after receiving this request.
14, computer interface method of testing according to claim 9 is characterized in that, this computing machine communication interface comprises serial line interface, parallel interface and USB interface.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101727374B (en) * | 2008-10-15 | 2012-07-04 | 英业达股份有限公司 | Method for testing PS/2 interface |
| US8306770B2 (en) | 2009-08-11 | 2012-11-06 | Wistron Corp. | Method, system and test platform for testing output of electrical device |
| CN102004682B (en) * | 2009-09-02 | 2013-01-23 | 广达电脑股份有限公司 | Test system and test method thereof |
| CN101996613B (en) * | 2009-08-20 | 2013-07-31 | 纬创资通股份有限公司 | Output testing method, system and platform of electronic device |
| US8744797B2 (en) | 2009-07-31 | 2014-06-03 | Quanta Computer Inc. | Test system and test method thereof |
| CN105472376A (en) * | 2014-09-30 | 2016-04-06 | 和硕联合科技股份有限公司 | Multimedia interface detection system and detection method |
| CN106791839A (en) * | 2016-12-19 | 2017-05-31 | 中国航空工业集团公司洛阳电光设备研究所 | It is a kind of to CCIR or EIA standard analog video digitized sampling method and devices |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4415398C2 (en) * | 1994-05-03 | 1998-07-02 | Siemens Ag | Test device for interfaces |
| CN2519336Y (en) * | 2002-01-11 | 2002-10-30 | 田明儒 | Computer serial interface test apparatus |
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- 2004-01-15 CN CNB2004100006589A patent/CN1315051C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101727374B (en) * | 2008-10-15 | 2012-07-04 | 英业达股份有限公司 | Method for testing PS/2 interface |
| US8744797B2 (en) | 2009-07-31 | 2014-06-03 | Quanta Computer Inc. | Test system and test method thereof |
| US8306770B2 (en) | 2009-08-11 | 2012-11-06 | Wistron Corp. | Method, system and test platform for testing output of electrical device |
| CN101996613B (en) * | 2009-08-20 | 2013-07-31 | 纬创资通股份有限公司 | Output testing method, system and platform of electronic device |
| CN102004682B (en) * | 2009-09-02 | 2013-01-23 | 广达电脑股份有限公司 | Test system and test method thereof |
| CN105472376A (en) * | 2014-09-30 | 2016-04-06 | 和硕联合科技股份有限公司 | Multimedia interface detection system and detection method |
| CN106791839A (en) * | 2016-12-19 | 2017-05-31 | 中国航空工业集团公司洛阳电光设备研究所 | It is a kind of to CCIR or EIA standard analog video digitized sampling method and devices |
| CN106791839B (en) * | 2016-12-19 | 2020-03-27 | 中国航空工业集团公司洛阳电光设备研究所 | Method and device for digitally sampling CCIR (China center IR) or EIA (electronic article Association) standard analog video |
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