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Signal testing device

A signal test and field signal technology, applied in image communication, cathode ray tube indicator, TV, etc., can solve the problems of small size and easy loss of resistors, achieve accurate test results, avoid misplugging of interfaces, and avoid small size of resistors Effect

Inactive Publication Date: 2011-11-09
SHENXUN COMP KUNSHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a signal test device, to use the signal test device to make the main board video interface also have a signal output after the display is unplugged, thereby completing the test of any signal, and avoiding the small and easy resistance of the resistor missing problem

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Embodiment Construction

[0018] refer to figure 1 , figure 2 and image 3 As shown, the signal testing device of the present invention is applied to testing VESA signals, and is connected with the main board video interface and the test probe respectively, and the signal testing device includes:

[0019] A first interface 100, which is connected with each pin of the above-mentioned motherboard video interface through several pins, and these several pins include: eight ground terminals, which are respectively the first ground terminal 5 and the second ground terminal 6. The third ground terminal 7, the fourth ground terminal 8, the fifth ground terminal 10, the sixth ground terminal 11, the seventh ground terminal 16, and the eighth ground terminal 17, and each ground terminal is grounded; a first blue Signal interface 3, which is electrically connected to a first resistor 20 and then grounded; a first green signal interface 2, which is electrically connected to a second resistor 21 and then grounde...

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Abstract

The invention reveals a signal testing device which is connected with a mainboard video interface and a test probe. The signal testing device comprises: a first interface, which includes a first blue signal interface, a first green signal interface, a first red signal interface, a first voltage interface, a first clock signal interface, a first data transmission interface and a first row signal interface; a second interface, which is provided with several pins, wherein the several pins include a second blue signal interface, a second green signal interface, a second red signal interface, a second row signal interface, a second field signal interface and a grounding interface; a memory. The mainboard video interface to be tested can perform a test for any interface when there is no display to be inserted. Resistors with small volumes are not easy to be lost. Simultaneously, a phenomenon of interface misplug can be avoided through adding several identifications.

Description

【Technical field】 [0001] The invention relates to a signal testing device, in particular to a signal testing device used for testing VESA signals. 【Background technique】 [0002] At present, the VESA (Video Electronics Standards Association) signal test uses an external resistor for testing. The signals that need to be tested include R (RED) signal, G (GREEN) signal, B (BLUE) signal, and H (HSYNC) signal. , V (VSYNC) signal, R signal, G signal, and B signal need to be tested with an external 75 ohm resistor for testing, H signal and V signal need to be tested with an external 2200 ohm resistor for testing, and the VESA test picture should be opened during the test, so that the CRT (Display) interface has signal output. [0003] In the actual test, we found that after we unplugged the CRT monitor, there was no signal output from the video interface of the main board (because the current design is plug and play, that is, the signal output will only be output when the monitor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/02G09G5/00
Inventor 贺文辉
Owner SHENXUN COMP KUNSHAN