Digital Gain Compensation - 2.6 English

Zynq UltraScale+ RFSoC RF Data Converter v2.6 Gen 1/2/3/DFE LogiCORE IP Product Guide (PG269)

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2.6 English

As the VGA adjusts the analog signal level, it might be required to compensate this digitally after the RF-ADC to keep the overall signal-level constant. To minimize the disturbance on the received signal, it is possible to align the gain adjustments so that the digital compensation is applied at the same point in time relative to the analog gain being applied. This application moment must account for relative latencies between the propagation of the analog gain change through the VGA, RF-ADC and digital logic. There are a number of ways this gain adjustment and synchronized application can be achieved.