Linux Driver Development VI (instruments for hardware knowledge that must be understood)

Linux Driver Development VI (instruments for hardware knowledge that must be understood) First, preface

In the previous article, Lao Xie has shared a lot of knowledge about the hardware that must be learned in the development process of embedded systems. As the end of this section (oops, finally to the end), Lao Xie also wants to talk about "instrument" with you. In this article, Lao Xie does not talk about the specific use of instruments, principles and so on. Just want to talk about a little relaxed, old Xie combined with their actual work, a combination of graphics and text, simple chat about the use of the instrument in the work.

To tell the truth, the previous articles basically have no technical content, including this article. Lao Xie insisted on writing these several intentions are:

1. Linux-driven development must be based on this;
2. By blogging, the way to make your Linux drive go more robust;

Second, classification

In Lao Xie's dictionary, the instrument has two classification methods:

1. According to the general degree: the instrument can be divided into general instruments, such as oscilloscopes, multimeter and other instruments, professional strong special instruments, such as old Xie Digital TV, this professional field will have a lot of special instruments, such as SFU, VM700, TG39 and so on.
2. by function: Lao Xie The instrument is also divided into two categories, output class (signal source) and input class (measuring instrument).

In the back of the content, Lao Xie will list some of the instruments, friends can follow the two classification methods, try to classify the look.

Three, commonly used instruments

OK, to get to the back, old Xie just in their work environment at random walked a lap, took a few pictures. See how many instruments you've used? Of course, if you are out of the field of television, there are a lot of special instruments in other fields, depending on your professional direction.

1. Oscilloscope, it is obvious that this is a general purpose instrument, belonging to the input class;
   
2. Multimeter, and oscilloscope, this goods is also a general instrument, belonging to the input class;
   
3. Spectrum meter, like, universal instrument, belongs to the input class;
   
4. SFU, a special instrument in the field of digital television, belongs to the output class. This goods is absolutely expensive, is the old Xie used the most expensive instrument, not one. The main function is to output a variety of digital TV signal, and can be set according to the requirements of various parameters. Complex parameter settings can be used to simulate a variety of real-life applications, such as simulating simple Gaussian channels, simulating complex doppler effects, and more.
   
5. From bottom to top are VM700, TG700 and TG30. These three devices are the most commonly used devices in the Analog TV field. The VM700 is an input device that functions like an oscilloscope and is used to measure the cvbs of the analog TV performance;tg700 is a signal source, output all kinds of cvbs waveform; TG39 is also an ATV dedicated signal source for generating analog RF signals.
   
6. Attenuator, which is a simple signal attenuator.
   
7. RF capture is both an input device and an output device. The main function is to burn the RF signal and to return the burned RF signal. This device plays a pivotal role in dealing with problems in the actual field.
   

In the actual work, there are many other instruments, it is not listed. Commonly used instruments must be used, in addition to their own professional direction, learn the use of the corresponding instruments can be.

Itxiebo
20160510

Linux Driver Development VI (instruments for hardware knowledge that must be understood)