I am not sure if I need to be DC coupled. My assumption is that it will be needed, because the attenuator needs a dc voltage to control the amount of attenuation that is applied to the RF. I have attached a block diagram and the datasheet for the attenuator. e2e.ti.com/.../PVVAN_2D00_6012_2D00_60_2D00_MP-Outline.pdf
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