The tuner included an IR adapter, It has a 1/8 TRS (stereo) jack on one end and a TS (mono) on the other. The manual says this adapter accepts industry standard IR input signals.

The manual also says that it uses the same codes as most other Sirius tuners, but like said before, I tried three sets with no response.

The Niles support guy said they have used the Polk Audio tuner with the ZR8630 and it works fine. Anybody know if it uses the same codes as most other Sirius tuners?