AWR1243BOOST: maximum LO input signal strength

Hi, 

I am trying to build two 1243Boost cascaded by swra574 AWR1243 Cascade document. I see this:

I see the LO input is from 0.1 dBm to 1.3 dBm according to TI's design, but I am using a different design and have different loss along the way, so could you please tell me what is the min and max value of LO input that could make cascading work and does not damage the hardware?

Thanks.