I want to ask the input LO signal is best -6dBm , but I wonder is this -6dBm means the initial single-end -6dBm or each pin -6dBm of difference signals.
in the meanwhile, how the LO difference signals do into the AD8349 chip,first add two difference signals and then make them quadrature?Or else? please.
The -6dBm LO drive level is specified into the balun single-ended w/200 ohm shunt resistor and 100pF capacitors. See evaluation board schematic on page 25 of the datasheet.