CN204425654U - A kind of fictitious load device of audio and video equipment test - Google Patents
A kind of fictitious load device of audio and video equipment test Download PDFInfo
- Publication number
- CN204425654U CN204425654U CN201520001543.5U CN201520001543U CN204425654U CN 204425654 U CN204425654 U CN 204425654U CN 201520001543 U CN201520001543 U CN 201520001543U CN 204425654 U CN204425654 U CN 204425654U
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- connectivity port
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- test
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- fictitious load
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Abstract
The utility model provides the fictitious load device of a kind of audio and video equipment test, comprise circuit board and be arranged at the lotus flower socket on circuit board, described lotus flower socket is provided with the video interface, left audio connectivity port and right audio channel connectivity port, and described the video interface, left audio connectivity port and right audio channel connectivity port are electrically connected with impedance respectively.Compared with television set even load, the utility model fictitious load device compact volume and convenience, is easy to pick and place and preserve, low cost of manufacture.And the components and parts used are passive device, secondary interference can not be produced, thus can not impact test result, improve the accuracy of test, only need during use to be connected with Device under test, a large amount of test durations can be saved.
Description
Technical field
The utility model relates to Product checking field, particularly relates to a kind of fictitious load device for audio and video equipment test.
Background technology
According to the requirement of China's electromagnetic compatibility product standard, such as standard C ISPR 13-2009, EN55013-2013, GB 13837-2003, it requires when detecting audio & video equipment, in test process, the output of detected audio & video equipment needs to connect actual auxiliary equipment or the fictitious load of equivalent electric property.The nominal load of audio & video equipment output connection is of a great variety in actual applications, if Device under test is DVD, power amplifier, video tape recorder, during the audio/video players such as television set, output answers the nominal load of termination can be television set, power amplifier, earphone, active audio amplifier etc.If use the nominal load of above-mentioned reality in testing, first laboratory needs the money of at substantial to purchase; Secondly not easily move in reality test and put above-mentioned nominal load, causing certain difficulty to test job, move and put the waste that above-mentioned nominal load also result in manpower and testing time; Finally, because above-mentioned load self can produce a large amount of electromagnetic waves in use, secondary interference is produced to Device under test, affects test result.
Summary of the invention
The technical problems to be solved in the utility model is for above-mentioned technological deficiency, and provide a kind of fictitious load device for audio and video equipment test of convenient operation, this fictitious load device can not generate electromagnetic waves, and thus can not produce secondary interference to Device under test.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of fictitious load device of audio and video equipment test, comprise circuit board and be arranged at the lotus flower socket on circuit board, described lotus flower socket is provided with the video interface, left audio connectivity port and right audio channel connectivity port, and described the video interface, left audio connectivity port and right audio channel connectivity port are electrically connected with impedance respectively.
Described the video interface is electrically connected with the impedance of 75 ohm, and described left audio connectivity port and right audio channel connectivity port are electrically connected with the impedance of a 10K ohm (namely 10 kilohms) respectively.
Described circuit board is PCB.
The utility model is incorporated to lotus flower socket by one 75 ohm and two 10k Ohmic resistances and is fixed on the nominal load of miniature circuit connecting plate being simulated the audio & video equipment in reality, compared with television set even load, the utility model fictitious load device compact volume and convenience, be easy to pick and place and preserve, low cost of manufacture, and, the components and parts used are passive device, secondary interference can not be produced, thus can not impact test result, improve the accuracy of test, only need during use to be connected with Device under test, a large amount of test durations can be saved.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model fictitious load device.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent; In order to better the present embodiment is described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.Describe position relationship in accompanying drawing only for exemplary illustration, the restriction to this patent can not be interpreted as.
As shown in Figure 1, the utility model patent fictitious load device comprises circuit board 1, this circuit board 1 is provided with lotus flower socket 2, this lotus flower socket 2 is normal video input interface, lotus flower socket 2 is provided with three connectivity ports, is the video interface 21, left audio connectivity port 22 and right audio channel connectivity port 23 respectively.The present embodiment lotus flower used socket 2 is the common lotus flower socket 2 in market, the utility model self there is no improvement to lotus flower socket 2, certainly, except using lotus flower socket 2, also other sockets can be used, as long as possess the video interface, left audio connectivity port and right audio channel connectivity port.
Circuit board 1 is also provided with three resistance, be respectively the first resistance 3, second resistance 4 and the 3rd resistance 5, the impedance of the first resistance 3 is 75 ohm, the impedance of the second resistance 4 and the 3rd resistance 5 is 10K ohm, described first resistance 3 is electrically connected with the video interface 21, second resistance 4 is electrically connected with left audio connectivity port 22, and the 3rd resistance 5 is electrically connected with right audio channel connectivity port 23.
When needs are tested Device under test, only the sound of Device under test, video-out port directly need be connected and namely test by checkout equipment in connectivity port corresponding with fictitious load device.
The circuit board 1 that the utility model uses is preferably PCB (also known as printed circuit board), circuit board 1 is established position, well-regulated hole, facilitate the installation of lotus flower socket 2 and resistance, the replacing of convenient resistance, for different testing equipments, suitable resistance can be changed quickly.Certainly, except selecting PCB, also can select other circuit boards, be appreciated that circuit board 1 described in the present embodiment is only the supporting body of electric elements.
Obviously, above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.All do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., within the protection range that all should be included in the utility model claim.
Claims (3)
1. the fictitious load device of an audio and video equipment test, it is characterized in that, described fictitious load device comprises circuit board and is arranged at the lotus flower socket on circuit board, described lotus flower socket is provided with the video interface, left audio connectivity port and right audio channel connectivity port, and described the video interface, left audio connectivity port and right audio channel connectivity port are electrically connected with impedance respectively.
2. fictitious load device according to claim 1, is characterized in that, described the video interface is electrically connected with the impedance of 75 ohm, and described left audio connectivity port and right audio channel connectivity port are electrically connected with the impedance of a 10K ohm respectively.
3. fictitious load device according to claim 1, is characterized in that, described circuit board is PCB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520001543.5U CN204425654U (en) | 2015-01-04 | 2015-01-04 | A kind of fictitious load device of audio and video equipment test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520001543.5U CN204425654U (en) | 2015-01-04 | 2015-01-04 | A kind of fictitious load device of audio and video equipment test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204425654U true CN204425654U (en) | 2015-06-24 |
Family
ID=53475978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520001543.5U Expired - Fee Related CN204425654U (en) | 2015-01-04 | 2015-01-04 | A kind of fictitious load device of audio and video equipment test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204425654U (en) |
-
2015
- 2015-01-04 CN CN201520001543.5U patent/CN204425654U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20160104 |