LMS RX PLL questions

Hi, I have a couple questions about the RX PLL in the LMS chip: - What are the various LOBUF for ? (1/2/3). Do they correspond the the 3 input of the RX side ? I see they're controlled by the SELOUT bits, but I have no idea how to choose. Should it be matched to LNASEL_RXFE ? - What's the expected levels of the LO harmonics ? In my tests I see to measure around -10 dB for 3xLO and ~ -22 dB for 5x LO. Is there any way to improve this ? The method I used to measure is to feed 400 MHz narrow bw signal to the input. Tune LMS to 400 MHz and measure the received strength, then change the signal generator to TX a signal at 1.2 GHz and measure again, then at 2GHz, and so on ... Cheers, Sylvain