Digital step RF attenuator dismantling

Introduction: The attenuator is widely used in various occasions that require power level adjustment. Now I will open a digital steps, and everyone will come together. The reason for the work, it will be exposed to the equipment and devices used in the RF field, which gives people a sense of precious words, which is also related to the performance parameters required for things in the RF field! Today, a digital steps declining device is removed to see what is long. It is such a small thing, and the simple appearance does not know how to hide the things, and adjust the amount of attenuation through 6-bit broadcast switches. Decisively torn off such plastic skin. Simple appearance is not simple, all metal aluminum housing, in order to ensure the isolation of the RF signal, unscrew the six-class screws in the four lessons. Open the metal case, it is to see is a simple PCB, which is not simple, concentrated is the essence! Look at the broadcast code switch is very clean. The PCB TOP surface can be seen by screen printing 31dB, and the digital attenuation chip is macom's IC. By viewing DataSheet, the following IC2 R50 should be a power chip, providing a 5V power supply for the attenuator IC. Summary, by disassembly, the surface of the RF attenuator can do is so simple, in fact, the essence is also in the IC design and PCB wiring, and instantly feels high in high frequency RF field. Bamboo Wang Xiaole

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