摘要:
In a method for optimizing an order in which certain points on a circuit board can be tested and evaluated, a coordinate system is established in a circuit diagram of a circuit board, and at least one locating point is preset. When an operator selects a signal path routing within the circuit diagram, the method can display the testing points in the selected signal path routing on a display device. After calculating the distance between each of the testing points and each of the at least one locating point, a group of distances is obtained. By comparing the distances, the minimum distance can be determined from the group of distances. The method further optimizes the order of the testing points according to the distance between each of the testing points and the locating point that consists of the minimum distance.
摘要:
A method for configuring setting values of oscilloscopes selects manufactures for a first oscilloscope and a second oscilloscope, and sends a command of acquiring a type respectively to the first oscilloscope and the second oscilloscope using the control codes of the selected manufacturers, to determine if the selected manufactures are the actual manufacturer. The method sends a command of acquiring setting values, respectively to the first oscilloscope and the second oscilloscope, using the control codes of the selected manufacturers, receives and compares the setting values of the first oscilloscope and the second oscilloscope. The method changes the setting values of the second oscilloscope to be same or similar with the first oscilloscope, and writes the changed setting values into the second oscilloscope.
摘要:
An exemplary actuating mechanism includes a driving shaft and a driven shaft. The driving shaft includes a connecting end. Engaging blocks are formed on the connecting end with a clearance defined between each two neighboring engaging blocks. The driven shaft includes a pivot end. Protruding blocks are formed on the pivot end with a gap defined between each two neighboring protruding blocks. The driving shaft is connected with the driven shaft via the engaging blocks of the connecting end respectively engaged in the gaps and the protruding blocks of the pivot end respectively engaged in the clearances.
摘要:
An electronic device and method for inspecting electrical rules of circuit boards includes selecting at least two design files that record electrical rules of the circuit boards and searching the electrical rules in the selected design files using preset parameter keywords. Same electrical rules of the selected design files are acquired by comparing the electrical rules in the selected design files. The same electrical rules and corresponding parameter values are input to a comparison table, and the comparison table is output.
摘要:
A signal integrity test system and method uses an oscilloscope to test a signal on each test point of a transmission line, obtains test parameter values of the signal on each test point, and compares the test parameter values with preset standard values. If any test parameter value does not match a corresponding preset standard value, a time-domain reflectometer is used to test an impedance value of the test point. If the impedance value matches a standard impedance value of the transmission line, the system and method determines the signal on the test point satisfies integrity requirements.
摘要:
A clamping apparatus for securing a workpiece is provided. The clamping apparatus includes a fixing base and a first and a second clamping device mounted on opposing sides of the fixing base. The first clamping device includes stacked clamping sheets, each of which is moveable and comprises an inclined clamping edge for contacting the workpiece. A support assembly supports the plurality of stacked clamping sheets; and an operating member is slidable relative to the support assembly and contacting the plurality of staked clamping sheets. The operation member is capable of moving at least one of the plurality of stacked clamping sheets relative to another one when the operation member slides relative to the support assembly, and moving at least one of the inclined clamping edge toward or away from the second clamping device to accommodate workpieces of varying sizes.
摘要:
In an electronic device and method of protecting software, a software program of the electronic device is invoked. The media access control (MAC) address of the electronic device and a serial number of a hard disk drive that stores the software program in the electronic device are searched. The MAC address and the serial number are compared with MAC addresses and serial numbers included in the software program, to determinate whether it is licensed to run the software program in the electronic device. Usage logs of the software program are further obtained to determine whether running of the software program in the electronic device is expired.
摘要:
A bearing includes a main body, a plurality of first magnetic members, a plurality of second magnetic members, and a plurality of friction members. The main body defines a pivot hole, and a plurality of first receiving portions and a plurality of second receiving portions around the pivot hole. Each of the second receiving portions defines a cutout. The first magnetic members are received in the first receiving portions. The second magnetic members together with the friction members are received in the second receiving portions, thus generating a repelling force between the first magnetic members and the second magnetic members to impel the friction members to partially extend out of the cutouts.
摘要:
Parameters of a radio frequency filter can be changed by changing structure of each component of the filter. Material of each component, diameters of each of magnetic cylinders, density of each of conductive coils, thickness of a dielectric layer, and thickness of an insulation tube can be changed. When any component needs to be replaced, each cover is rotated, with connection partitions move to two slots of an insulation portion, to detach the filter.
摘要:
A method and system for designing a circuit board designs wiring of the circuit board, and determines electronic rules and physical rules of the wiring design. The method and system creates a board file by designating a file name, outputs the electronic rules into the board file, and outputs the physical rules into the board file according to a preset output format. The method and system further generates a circuit diagram according to preset initial parameters, and applies the electronic rules and the physical rules to the circuit diagram according to the board file.