1. There's really no benefit to route the TV broacast video to the 590 as there is no video upscaling done with this model. If you had the 790 (which does upscale to 1080p), you could route the coax to a VCR or DVD player that had a TV tuner and then run separate video and audio cables out to the AVR. You could do that with the 590 as well if you choose. At the very least you can connect either a RCA or optical cable from the TV to the 590 and play audio through your surround system while muting your TV speakers. If you can receive OTA channels (roof antenna), you would be able to get DD 5.1 with an optical cable from the TV to the 590, otherwise SD channels would only pass PCM 2.0 over the optical.
2. Connect the wireless transmitter to the VCR OUT jacks although you must then connect an RCA cable from each source (eg TV) as only analog audio will pass through the VCR out.
3. You have your choice of using either Dolby's simulated surround sound (DD PLII) or the various DSP modes (SIMU button) that Denon uses. The generally used surround mode is Dolby's STANDARD (STD) which would take a stereo signal and simulate DD 5.1 using DD PLII.
4. Input source volume can be increased or decreased by 12db for each source including the TUNER. Refer to your Owner's Manual for futher instructions.
For more informationa and any additional questions, please join us in the Official 1610/590 Owner's Thread.