Substrate inspection before drilling: A. Name, Number, Specifications, Dimensions, Copper and Platinum Thickness B, No Scratch C, No Bending, No Deformation D, No Oxidation or Oil Pollution E, Quanti

1. Impedance matching impedance matching refers to a suitable matching mode between signal source or transmission line and load. There are two kinds of impedance matching: serial and parallel accordin

The repair of equipment is very important for equipment suppliers and equipment users. The supplier generally focuses on the diagnosis of equipment failure, and then changes the smallest fitting unit