With an input tone or LTE TX signal at the RX input when I measure the RSSI value from register 0x1A7 I'm seeing an offset that I can't fully explain on the RX path. I'm measuring the input power level at the RX input of the chip and the difference is ~16-18 dB. The chip is in AGC mode and with varying input power level the gain index varies as expected. Channel power is within the target window.
What could be the potential reason(s) for this difference on the RSSI measurement?