Sleep is hi, TXEN is high and the serial inputs all look good. Set gain to 0x38 but no output. Input is 400mV diff sinewave at 50MHz. Do you need to toggle TXEN or something to get an output?
I noticed the common mode at input is at 2.1V rather than ~1.6 as the documentation indicates but since I am C coupling the diff input there is nothing I can do about that.