I think the confusion is because there are 2 different SCH models (and actually 2 different packaging versions of the SCH1) and they do not have the same capabilities. The SRH2000 or the SCH2P are the only sirius units that will work using standard 2 conductor IR. The add on modules (SCH1) only work as an add on to an AVR or as a second zone on the SRH2000. The SCH2 is a 1/2 width 1sp rack mount unit (and does have an f connector for antenna and the sliding switch for control options) and was recently updated to work with standard IR control systems but has no video output, only a front panel numeric display. the SRH2000 has video out as well as industry standard IR input and RS232 and is also rack mountable. As was stated above, the RS232 only works in 2 way but the new RTI driver works extremely well on these units. Both the SCH2P and the SRH2000 units are available through A**D.