The Aux input is activated on my SARA 1.88.25.1 SA8300HD, but I need to use a universal remote to use it (Radio Shack 6in1). Pressing TV/VCR button on the Universal Remote(preprogramed to SA8300) switches to the Aux input, and pressing it again returns back to digital cable. The aux input IS NOT recordable to the 8300's hard drive. --hourglass