The DVR+ (CM-7500) has a power saving feature "Inactivity Standby" that allows you to program the DVR+ to go into sleep mode after predetermined times of inactivity (Off, 4, 5 & 6 hours). Or you can shut this feature off completely if you never want your DVR+ to automatically go into sleep mode.
To adjust this setting; Press Menu on the Remote Control. Now select Settings>Power Options>now you change/check your setting.
Note: When in sleep mode scheduled recordings will still record as if the DVR+ was turned on.