USB-UIRT with Digital TV Converter Box and Orb?

I am considering getting the USB-UIRT to control my Zenith DTT900 Digital TV to Analog converter box. The box tunes to digital stations (i.e. 2.1, 4.1, 4.2, 4.3, 5.1) and I am not sure if the IR Blaster or orb will be able to control this.
My tivo is able to control the DTV Converter properly, so I know it is possible for IR codes to be created, but since I know nothing about the USB-UIRT, I am hoping someone can let me know if this will work before I spend the $50.
Thanks
(I am using the converter box now with my Hauppauge PVR-150 and Orb, but I can only get 1 channel remotely. But the converted HD OTA signal looks amazing on my iphone!)
My tivo is able to control the DTV Converter properly, so I know it is possible for IR codes to be created, but since I know nothing about the USB-UIRT, I am hoping someone can let me know if this will work before I spend the $50.
Thanks
(I am using the converter box now with my Hauppauge PVR-150 and Orb, but I can only get 1 channel remotely. But the converted HD OTA signal looks amazing on my iphone!)