A floppy disk with both sides prepared for recording data. You can store twice as much data on a double-sided disk, but you need to use a double-sided disk drive. All modern disks and disk drives are double-sided.
Definition Prefix: D
Not working. A computer system is said to be down when it is not available to users. This can occur because it is broken (that is, it has crashed), or because it has been made temporarily unavailable to users so that routine servicing can be performed.
In digital television, downconversion is the process where a high-definition signal is converted to a standard-definition picture to be displayed on a television with a lower resolution. Downconversion reduces image detail but the picture will still look quite sharp. Contrast with upconversion.
- down converter
In satellite communications, down converter is a device for fixed satellite service (FSS) television receivers to convert 4-GHz signals to the 70-MHz frequency range.
In satellite communications, downlink is the establishment of a communications link from an orbiting satellite down to one or more ground stations on Earth. Contrast with uplink.