I just had a tech supervisor out to my house for a trouble shoot. He determined that my hr21-200 was defective , as it was not reading the HD signals through the b-band converters. And yes the b-band was new and yes the multi switch was replaced. He is coming back out tomorrow with the new hr23-(600 if I recall). Does this box exist, if so what is the spec on it? He did mention that the b-bands are buitl into the box.