We would like to adjust the IF input DC offset for LO null and are not sure what the internal circuit resistance is to GND or Rail. The datasheet recommends +/-0.2V and 3mA max and the ports are 100 ohm differential.
Can we use a DAC to each input with a series resistor? What value do you recommend for the series resistor to limit the current to 3mA? Is there a recommended circuit for this?