TW DVR connection?

[budda]

Have a friend has a TW DVR don't have model number but can get it. He ran a second output to down stairs TV. He used coax out on DVR. HDMI is going to main set. He said the coax is analog only? Is that true? Or should there be HD content run thru the coax out? Thanks

Cisco Explorer 8640HDC

[budda]

Analog only found it on line, thanks anyway.