Duplicating PCB Circuit Card

In the process of duplicating PCB circuit card, data bus must strictly follow the rules of High frequency, medium frequency, low frequency sequence. turns the sequence upside down should be strictly prohibited, rather have the wire track among different levels with longer length than have them overpass the ranks.

Especially when clone PCB board schematic from frequence conversion probe, recycling conversion probe, frequence adjustment probe which have a much more strict requirement on the grounding line, if improper PCB reverse engineering can cause self-activation and malfunctions. For high frequence circuit such as frequence conversion probe, use the cycling groundling line can ensure the great ability of shielding.

lead wire with strong current such as public ground line, power amplifier lead wire should be as wide as possible, in order to decrease the resistance value and voltage deterioration, it can also reduce the self-activation generated from the composited coupling.

The wires with high impedance value should be as short as possible, wires with lower resistance value should be lower, since the wire with higher impedance can absorb the signals easier, and cause the un-stability of circuit. Power supply wires, groundling wires, basic anode wire without any reflective components, lead wire from transmitting anode are all belong to low impedance wires.

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