How is antenna distribution handled for QLX-D?
It is the same as with ULX-D single receivers. Use the UA844+SWB RF distribution amplifier, UA221 RF splitter/combiner, etc.
Note: Unlike the ULXD4, the QLXD4 does NOT provide 12Vdc bias on its antenna ports. Bias can be added by using the UABIAST accessory.