They are indeed smart these darn things, would be smarter though if for each antenna they had an RF-port, even if that meant at least 6 antenna connectors, he-he-->
http://www.mwrf.com/files/30/22973/fig-01.jpgFeeding the same antenna to several receivers? Or otherwise?
Will we hear the antenna signal or the oscillations of the other radio, etc?
Why go for a splitter and which splitter?
"An Evaluation of Commercially Available
Signal Splitters" (by John Bryant and Bill Bowers)
http://www.dxing.info/equipment/splitters_bowers_bryant.dx