CN203910069U - Teaching device for achieving eye pattern experiment - Google Patents
Teaching device for achieving eye pattern experiment Download PDFInfo
- Publication number
- CN203910069U CN203910069U CN201420170178.6U CN201420170178U CN203910069U CN 203910069 U CN203910069 U CN 203910069U CN 201420170178 U CN201420170178 U CN 201420170178U CN 203910069 U CN203910069 U CN 203910069U
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- China
- Prior art keywords
- eye pattern
- rom drive
- usb
- pin
- sata
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- Expired - Fee Related
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Abstract
The utility model belongs to teaching equipment for a communication principle curriculum and particularly relates to a teaching device for achieving an eye pattern experiment. A USB interface of a computer host is connected with a USB-SATA converter. An output end of the USB-SATA converter is connected with an SATA data end of a CD-ROM drive. A GND pin and an RFO pin of the CD-ROM drive are led out through leads, wherein the GND pin of the CD-ROM drive is connected with a GND port of an analog oscilloscope through a data line, and the RFO pin of the CD-ROM drive is connected with an input port of the analog oscilloscope through a data line. By means of a common computer, the USB-SATA converter and a CD-ROM drive system, the analog oscilloscope realizes an eye pattern formed by sound signals of an optical disc. The eye patter is reproduced in the daily life, so that on one hand, students are helped to understand theoretical knowledge of formation and influence factors of an eye pattern and the like, and on the other hand, the students are helped to know about the application field of the eye pattern in life, and an object of learning for practice is achieved.
Description
Technical field
The utility model belongs to Course of Communication Principles teaching equipment, particularly a kind of instructional device of realizing eye pattern experiment.
Background technology
Eye pattern experiment is an experiment in Course of Communication Principles teaching.In present teaching process, under lab realize eye pattern experiment, conventionally use matlab software, mechanically input the order of specifying, obtain the curve map of eye pattern.And the impact of parameter on eye pattern in principle, circuit that students produces for eye pattern in communication system and eye pattern and actual life to contact understanding very few.But present stage, do not have ready-made experimental facilities and can realize eye pattern experiment.
Summary of the invention
The utility model provides a kind of instructional device of realizing eye pattern experiment, can on analog oscilloscope, realize the eye pattern of compact disc audio signal formation.
The technical solution adopted in the utility model is:
The USB interface of main frame is connected with USB-SATA converter, and the output terminal of USB-SATA converter is connected with the SATA data terminal of CD-ROM drive; The GND pin of CD-ROM drive is connected by data line with the GND mouth of analog oscilloscope, and the RFO pin of CD-ROM drive is connected by data line with the input port of analog oscilloscope.
The model of described analog oscilloscope is YB4320F.
GND pin and the RFO pin of described CD-ROM drive are drawn by wire bonds.
The power end of described USB-SATA converter is connected with power supply adaptor.
The model of described power supply adaptor is RS-AB02J00, and it is input as: AC100-240V, 50/60HZ, 0.8A max, be output as: DC12V, 2A.
The beneficial effects of the utility model are:
This device, by means of common computer and CD-ROM system, has been realized the eye pattern of compact disc audio signal formation on analog oscilloscope.The reproduction in daily life of this eye pattern, deepens the understanding of student to eye pattern formation, influence factor scheduling theory knowledge on the one hand, makes on the other hand student understand the application of eye pattern in life, reaches the object of studying in order to practise.
This device is simple, utilizes common computer, USB-SATA converter and general experimental facilities analog oscilloscope can demonstrate the eye pattern that sound signal forms, successful, and theory is associated with actual life, and the teaching of being convenient to Course of Communication Principles is promoted.
Brief description of the drawings
Fig. 1 is the connection diagram of device described in the utility model.
Number in the figure:
1-computing machine; 2-USB-SATA converter; 3-CD-ROM drive; 4-analog oscilloscope; 5-power supply adaptor.
Embodiment
The utility model provides a kind of instructional device of realizing eye pattern experiment, below in conjunction with the drawings and specific embodiments, the utility model is described further.
As shown in Figure 1, the USB interface of main frame 1 is connected with USB-SATA converter 2, and the output terminal of USB-SATA converter 2 is connected with the SATA data terminal of CD-ROM drive 3; GND pin and the RFO pin of CD-ROM drive 3 are drawn by wire bonds, and wherein, the GND pin of CD-ROM drive 3 is connected by data line with the GND mouth of analog oscilloscope 4, and the RFO pin of CD-ROM drive 3 is connected by data line with the input port of analog oscilloscope 4.The power end of USB-SATA converter 2 is connected with power supply adaptor 5.
The model of the analog oscilloscope 4 using in the present embodiment is YB4320F.
The model of power supply adaptor 5 is RS-AB02J00, and it is input as: AC100-240V, 50/60HZ, 0.8A max, be output as: DC12V, 2A.
When experiment, first open computing machine 1 and USB-SATA converter 2; In CD-ROM drive 3, put into CD, open low speed control software cd-speed, click " scanning laser disc " button, arranging in speed option, select 1 speed running; Suitably regulate VOLTS/DIV (being adjusted to 50mV) and the TIME/DIV of analog oscilloscope 4 (to be adjusted to s) button of 0.1 μ, just the eye pattern that sound signal that CD-ROM drive reads forms be can obtain, the sharpness of eye pattern stitching and the stretching degree of eyes observed.(1) eye pattern stitching is more clear, and channel quality is better; Otherwise if there is noise, noise will be superimposed upon on signal, the eye pattern stitching of observing can thicken unclear.(2) eye pattern eyes open greatlyr, and eye pattern is more proper, and CD intersymbol interference is less.Choose the CD that quality is different and repeat above operation, grasp noise and the impact of intersymbol interference on eye pattern, the quality of qualitative evaluation channel system and the quality of CD height.
Test completely, close successively low speed control software, analog oscilloscope, computing machine, power supply, remove line.
Claims (5)
1. realize the instructional device of eye pattern experiment for one kind, it is characterized in that, the USB interface of main frame (1) is connected with USB-SATA converter (2), and the output terminal of USB-SATA converter (2) is connected with the SATA data terminal of CD-ROM drive (3); The GND pin of CD-ROM drive (3) is connected by data line with the GND mouth of analog oscilloscope (4), and the RFO pin of CD-ROM drive (3) is connected by data line with the input port of analog oscilloscope (4).
2. the instructional device of realizing eye pattern experiment according to claim 1, is characterized in that, the model of described analog oscilloscope (4) is YB4320F.
3. the instructional device of realizing eye pattern experiment according to claim 1, is characterized in that, GND pin and the RFO pin of described CD-ROM drive (3) are drawn by wire bonds.
4. the instructional device of realizing eye pattern experiment according to claim 1, is characterized in that, the power end of described USB-SATA converter (2) is connected with power supply adaptor (5).
5. the instructional device of realizing eye pattern experiment according to claim 4, is characterized in that, the model of described power supply adaptor (5) is RS-AB02J00, and it is input as: AC100-240V, 50/60HZ, 0.8A max, be output as: DC12V, 2A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420170178.6U CN203910069U (en) | 2014-04-09 | 2014-04-09 | Teaching device for achieving eye pattern experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420170178.6U CN203910069U (en) | 2014-04-09 | 2014-04-09 | Teaching device for achieving eye pattern experiment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203910069U true CN203910069U (en) | 2014-10-29 |
Family
ID=51784326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420170178.6U Expired - Fee Related CN203910069U (en) | 2014-04-09 | 2014-04-09 | Teaching device for achieving eye pattern experiment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203910069U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676012A (en) * | 2014-11-17 | 2016-06-15 | 上海华虹集成电路有限责任公司 | Testing method of USB device eye pattern |
-
2014
- 2014-04-09 CN CN201420170178.6U patent/CN203910069U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676012A (en) * | 2014-11-17 | 2016-06-15 | 上海华虹集成电路有限责任公司 | Testing method of USB device eye pattern |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20160409 |