__ decoder and reduced channels

The installer attached a Sisco STA1520 by usb to my Roamio, with it's own cable line input. He stated that a couple of channels were still only analog (!!??), and it needed it for those.



It warned that because the tuner was attached, not all six tuners would be available.



Is this only for those channels? If I use the others, do I still get all six?



hawk