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frame of the board, the outside.Multi Layer (Multilayer) (silver) All wiring layers are included, the general single-sided plug-in pad on this layer, the flower line is all the layers are painted.1.TopLayer (top) top layer routing layer used to draw electrical connections between components.2.BottomLayer (bottom layer) layer of the underlying wiring, acting on top of the wiring layer.3.midlayer1 (middle layer 1) is the function of the multilayer boar

Digital Signal Processing Unit (same as the Sampling Discrete Control Unit) ├ ── Data conversion unit ├ ── ADC, DAC Component-Data Acquisition System Data Acquisition component Sampled-sample Hold Amplifier sampling-keep Amplifier Sampled-sample data conversion block sampling data conversion unit (similar to the Sampling Discrete Control Unit) Digital Block digital circuit unit ├ ── Digital source position signal source Entry gate circuit Comparator ├ ── Multiplexer: MUX data selecto

the parallel conductor. Therefore, the most suitable capture grid should be set to 25mil. Complete the following steps to set up the capture grid: 1. Choose from the menu design? Options (Hotkey D,o) Opens the Board Options dialog box. 2. In the Grids tab, set the value of Snap x, snap y, Component x, and Component y columns in the dialog box to 25mil. Note that this dialog box is also used to define the electrical grid.

PCB design environment based on the determined circuit board size and various mechanical positioning, and place the required connectors, buttons/switches, screw holes, assembly holes and so on according to positioning requirements. And fully consider and determine the wiring area and non-wiring area, such as the scope around the screw hole is not wiring area ). Third:PCB layout. In other words, the layout is to place the device on the board. In this case, if you have prepared all the preparatio

Protel 99SE User ManualProtel 99SEProtel 99SE adopts database management. The Protel 99SE software follows the features that Protel earlier versions are easy to learn. The internal interface is roughly the same as Protel 99, and some new functional modules are added, providing more powerful functions. The new layer stack management function allows you to design 32 signal layers, 16 ground and electrical layers, and 16 mechanical layers. The new 3D fun

Indicator Light Function PWR Indicates whether the device is powered on. TL Connection/activity indicator between the optical transceiver's twisted pair port and the peer device's twisted pair port. If it is always bright, it indicates that the electrical port is connected; if it is blinking, it indicates that the electrical port has been connected to the switch and is se

parallel data. We know that the data in the computer is in the basic unit of byte, and the access to a byte is parallel, that is, 8 bits are obtained/written at the same time. Serial communication requires that this byte be "broken" and sent and received in chronological order to achieve serial. For example: The data in memory is: 1 1 1 0 0 1 0 1 The actual effect of the serial send is (sort by time "Note 1"):10100111Reception is the inverse process of the above process. This is the most basic

equipment H Metallurgy 00/09 metallurgical Synthesis10/19 metal chemistry analysis methods20/29 methods for testing the physical and chemical properties of metals30/34 metallurgical raw materials and auxiliary materials40/59 Steel Products60/69 nonferrous metals and their alloy products70/74 Powder Metallurgy80/84 semi-metallic and semiconductor materials90/99 metallurgical Machinery and Equipment J machinery 00/09 mechanical synthesis10/29 General Parts30/39 Processing Technology40/49 proce

1. Physical LayerPhysical Layer Protocol: RJ45, CLOCK, IEEE802.3 (Repeater, hub) Role: Transmission of bits via media, determination of mechanical and electrical specifications (bit bit) 1.1 Communication Fundamentals Data-the entity that transports the message. Signal (signal)--the electrical or electromagnetic performance of the data. Analog signal (analogous signal)-the

, but the optical fiber system is extremely expensive, and the price is often determined by the customer. The cost of the optical fiber cabling system today is twice that of the six types of wiring. At the same time, it is easier to install copper cables than to install optical cables. In addition, copper products also support IEEE (802.3af) DTE standards being developed. 6. What is electrical balance? A: The circuit composed of two copper wires is re

PCBPrint circuit board (Printed circuit board) is the basic support for circuit components and devices in electronic products. Its Design Quality often directly affects the reliability and compatibility of embedded systems. In the past, in some low-speed circuit boards, the clock frequency is generally about 10 MHz. The main challenge of the circuit board or encapsulation design is how to distribute allSignalLine and how to avoid damaging encapsulation during assembly. Since the interconnection

process and control signaling in the electrical domain.Edge Nodes Group IP addresses with the same egress vro addresses and QoS requirements into burst packets to generate burst data groups and corresponding control groups. Transmission of burst data groups and control groups over physical channels (generally different wavelengths in the same optical fiber) and time (the control group is earlier than the burst data group for a period of time, that is

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