vidicon tube

How to perform Optical Fiber fusion and testing? 1. Optical Fiber Connection (1) optical fiber connection. The principle of optical fiber connection should be followed: when the number of cores is equal, it must be connected to the corresponding colored optical fiber in the tube. If the number of cores is different, the number of cores is large first, and then the number of cores is small. (2) optical fiber connection methods include splicing, active

transient voltage suppressor diode is required for AC communication. AC is the grid voltage, the transient voltage generated here is random, sometimes also encountered lightning (lightning induced transient voltage) so it is difficult to quantitatively estimate the instantaneous pulse power PPR. However, the maximum reverse operating voltage must be properly selected. The general principle is that the AC voltage is multiplied by 1.4 times times to select the maximum reverse operating voltage of

is designed to reduce the noise generated by the deviceInterference (not in the skeleton). Some people say that decoupling is for low frequency, bypass is for high frequency, I think this isInaccurate, the high-speed chip internal switch operation may be up to the upper GHz, resulting in interference with the power cord has been significantlyDoes not belong to the low frequency range, for this purpose the decoupling capacitor also needs to have very good high-frequency characteristics. This art

, set different response keys to move values or rotate values, to do related operations.3.3 Map Building1. Create all map units and initialize them according to the selected mode. Map Unit drawing, three-dimensional map drawing with a unit as the benchmark, the map unit is translated to achieve the purpose of drawing the entire map. The 3D function is called to determine the projection of the point-to-horizon plane of the three-dimensional space, and the graphical operation on the visual interfa

High performance can not be separated from asynchronous, asynchronous queue, internal is the principle of producer-consumer model.Core concepts in the design:Job: A task that requires asynchronous processing, is the basic unit in BEANSTALKD, which needs to be placed in a tube; tube: A well-known task queue that stores a uniform type of job, which is the object of producer and consumer operations ; the produ

Bridge, I/O, power supply mos tube, a variety of slots. If it is found that there is obvious burns, damage, the first to be burned, damaged parts to be replaced. 2, check the motherboard on the PCB whether there are scratches, cut off, PCB burning, drop parts and other man-made failures, such as such a failure, the first to fill the line, fill the work. The main direction of observation is the edge of the motherboard and the back. Second, before th

Written in front: source collation and knowledge, the original link to http://www.zhihu.com/question/32163005/answer/55772739, Lo ZhiyuThank the author again ~ ~Suppose you are an air tube at an airport, you need to manage all the routes to your airport, including inbound, outbound, some flights need to be on the tarmac, some flights need to go to the boarding gate to pick up passengers.What would you do?So here's the question:Soon you will find the e

voltage of this insurance is 12V, this voltage for the high-voltage plate power supply, at that time did not have this insurance tube on hand, With 0.22-euro resistance instead, and welding the square capacitor, and then add Electric test machine, power after a two seconds, saw a white smoke with a burnt smell, immediately power off. That white smoke should be from d10pf06 this field tube come out of, weld

to the fourth step check. The above inspection method is based on the monitor itself without electrical failure, that is, the power led on the monitor does not light up when the host power is turned on. If the above steps are checked one by one, the monitor is still not displayed, it is likely to be a circuit failure, should be asked to repair professional. Q: How to solve the ambiguity after the display is turned on for several minutes? A: This situation may be the

speed of static difference slightly larger. (3) Limited unipolar mode, in addition to the unipolar modulation, the energy-saving braking path is limited. Advantages: The control circuit is simple, if connected to the H-bridge mode, can also turn positive and negative. Disadvantages: Can not brake, not energy braking, the load exceeds the set speed can not provide reverse torque. Speed adjustment static difference is big, the speed performance is very poor, the stability also is not good. F

Hardware Failure Analysis: the use of the process, the mouse ball contaminated with dust, hair crumbs and other debris, will also lead to reduced flexibility or even temporarily lose their role. If you find out when the mouse cursor is not moving or moving very hard, flip over to check, Ten is the mouse ball glued on the stolen goods. Clear it back to normal. Wheel of the mouse to remove the wheel, cleaning the rollers and the mouse on the roll of dirt, general can be used normally.

is more obvious, you can see directly from the appearance (to the obvious backlog of traces). If there is, then it is best to abandon this with fiber. second, because the micro-curvature is difficult to see through the naked eye, this may need to pass the help of the instrument. At both ends of the fiber, a test instrument is connected, and then the degree of attenuation of the fiber can be viewed. If the user can be allowed to, then a little bit of a macro or micro-music is not a problem. Bu

back cover of the keyboard with a brown brush or vacuum cleaner to remove the stolen goods. Drag and drop easy to break the keyboard line, so that the keyboard failure. So, we should try to keep the workplace clean and tidy, especially on the edge of the keyboard to clean, do not smoke near the computer, do not eat near the keyboard, do not put the water Cup near the keyboard, do not plug the keyboard on the line, regular use of pure alcohol scrubbing keyboard, use the keyboard, try not to dra

easy to burn your CPU, overclocking should be as far as possible not to improve the core voltage to help excess, because this is not worth the candle. Four, memory Memory is more afraid of overclocking, once the required frequency is not reached, very easy to appear black screen, and even heat damage. V. CD-ROM drive The optical drive is most afraid of dust and vibration. Dust is the laser head of the "killer", vibration will also make the bald-headed "disk", damaged bald. Another coarse op

What is the difference between an object in a Free state and an object in a transient state. Answer one: There are 3 types of Hibernate objects: Transient (Transient), persistent (persistent), and off-state (Detached). Objects that are in persistent state are also known as PO (Persistence object), and instantaneous and de-tube objects are also known as VO (Value object). Instantaneous state A Java object that opens up memory space by the new command,

CRT TV: CRT is a cathode ray tube (cathode ray Tube), is what we often say the picture tube. The normal TV at home is CRT TV. First, let's look at what CRT TV is. CRT TV: CRT is a cathode ray tube (cathode ray Tube), is what we often say the picture

Transient state (Transient), persistent State (persistent), off-pipe (Detached). Objects that are in persistent state are also known as PO (Persistence object), and instantaneous and de-tube objects are also known as VO (Value object).Instantaneous stateA Java object that opens up memory space by the new command,eg. person person = new Person ("amigo", "female");If the object is not referenced by a variable, it will be reclaimed by the Java virtual ma

surface. If the pipe line is suspended, it should be fixed with a boom. The hanger is generally made of angle iron. The shape of the hanger can be T-, I-, and II-type according to the form and quantity of hanging wire tubes. The T-type boom pipe is used for Vertical arrangement and hoisting, the I-type pipe is used for horizontal arrangement and hoisting, And the II-type is used for horizontal arrangement and hoisting of a large number of pipelines. 2. Wire Cutting, bending, and wire set A. Ren

DZYloveschemistry, andheenjoysmixingchemicals. DZYhasnchemicals, andmpairsofthemwillreact. tags, andheneedstopourtheminonebyone, inanyorder. Letsconsiderthedangero DZY loves chemistry, and he enjoys mixing chemicals. DZY has n chemicals, and m pairs of them will react. he wants to pour these chemicals into a test tube, and he needs to pour them in one by one, in any order. let's consider the danger o DZY loves chemistry, and he enjoys mixing chemic

During the establishment of a LAN, according to the general specification of Integrated Wiring, the construction should use a network cable with a "meter" or a special "shaped number tube" at the crystal head on both sides ", the computer identification records corresponding to the "meter mark" or "number tube" are also recorded in the cabinet. The number of computers in many units was very small, and some