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Computer and Mobile Terms

Reverse Control Channel (RECC)

The Control Channel that is used from the mobile station to the base station direction, also known as the control channel uplink.

Figure to ground relationship

Another design paradigm taken from psychology. The most visually striking element at any one time will be perceived as having focus and the most relevance.

White Balance

White balance is a setting available on most digital cameras and camcorders that defines how the color white should...

Multimedia

As the name implies, multimedia is the integration of multiple forms of media. This includes text, graphics, audio...

CDPD

Cellular Digital Packet Data - sending digital data over the existing AMPS system, by transmitting dense packets on vacant analog channels

Default

This term is used to describe a preset value for some option in a computer program. It is the value used when a...

DAR

Digital Audio Radio.

Hyperlink

A hyperlink is a word, phrase, or image that you can click on to jump to a new document or a new section within the...

Overwrite

In computing, overwriting refers to replacing old data with new data. There are two primary types of overwriting...

Torrent

A torrent is a file sent via the BitTorrent protocol. It can be just about any type of file, such as a movie, song...

System Analyst

A system analyst is the person who selects and configures computer systems for an organization or business. His or her...

Flash Memory

Flash Memory in a type of non volatile computer storage chip that can be electrically erased and reprogrammed. It was developed from EEPROM (electrically erasable programmable read-only memory) and must be erased in fairly large blocks before these can be rewritten with new data. The high density NAND type must also be programmed and read in (smaller) blocks, or pages, while the NOR type allows a single machine word (byte) to be written or read independently.

Caps Lock

Caps lock is a feature nearly all keyboards have that, when active, capitalizes each letter typed on the keyboard...

TDMA

Time Division Multiple Access. TDMA systems are able to transmit multiple voice circuits per channel. A TDMA channel is a single FDMA channel divided up in time into multiple time slots. Three users can take it in turn to share one radio channel. The channels can vary in bandwidth and depending on the type of system, the time slots can transmit all or part of a voice circuit. Each user's speech is stored, compressed and transmitted as a quick packet, using controlled time slots to distinguish them-hence the phrase 'time division'. Its uses 30 KHz channels and a vocoder rate of 8 Kbits/sec. At the receiver, the packet is de-compressed. Example: TDMA channel        -------------------------------------------------------------------- 30 KHz | Voice circuit #1|Voice circuit #2|Voice circuit #3|Voice circuit #4|        -------------------------------------------------------------------- Depending on the type of system, slots 1, 2, 3, & 4 could each transmit a voice circuit. In this example, 4 telephone circuits are transmitted on a single 30 KHz channel, a 4X increase in capacity over the FDMA example.

Tweak

When you modify a certain piece of hardware for better performance, it is often referred to as "tweaking" it...

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