Hi Christer, How are you? Before we can give you more measurement results, here are some suggestions from our system engineer: 1. After you changed INM input pin with 1uF capacitor (originally: 15nF), on data sheet page 131, Table 72, Must set PGA_HPF_DIS = 1 (also see page 15) 2. also see page 132, table 74 to make sure LNA_HPF_DIS (0=enable HPF, 1=disable HPF) and page 142, table 89 to set LNA_HPG_PROG and page 143, table 91 to set RED_LNA_HPF_3X Please follow below for setting: on data sheet page 23, figure 13, (also see page 15) finally set up LNA_HPF_PROG and RED_LNA_HPF_3X to let HPF (to be -3db cutoff = 16kHz) 3. so far we don't have harmonics test report at low freq signal for example 30kHz, therefore there is no information for that. Thank you very much! Have a nice day! Best regards, Chen Due to the signal balance, after you changed the INM input pin with 1uF
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