The 2 tuner receiver you have is probably a 322, not a 311, which is a single tuner receiver. I believe all the dual "output" receivers (which have two satellite tuners, and HD receivers also have one OTA tuner) use channels 21-69 for the output of TV2 (TV1 is uses channels 3-4). Note that the output of TV2 on HD receivers is SD only.
You can download and look at the user manuals yourself from www.dishnetwork.com (under Support/User Guides). The dual output HD receivers are the ViP222 and ViP622/722 DVRs.
You can download and look at the user manuals yourself from www.dishnetwork.com (under Support/User Guides). The dual output HD receivers are the ViP222 and ViP622/722 DVRs.