Analog Devices ADRV9005 Reference Manual page 210

Reference Manual
RECEIVER GAIN CONTROL
When the receiver gain control is not working as expected, perform the following simple self-debugging.
Check if the gain control mode is set as AGC or MGC.
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Check if the MAX and MIN index are set properly. When set improperly, the gain control capability can be significantly impacted.
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If detectors are not working, check if the gain step is set to 0, which disables gain attack or gain recovery.
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When signal saturation is observed, adjust the slicer/interface gain.
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