Terminology Compilation

Date/Time Generator

Installed between a CCTV camera and a monitor, it generates the information of Date, Time and camera ID.

DC Power

Direct Current Power; can be derived from an AC adapter or from a battery. Among DC voltages of 6, 9, 12, 24, 28, 12VDC is most common in the CCTV industry.

Decibel (dB)

The power or voltage ratio of two signals.

Direct Drive (DD)

Dynamic Host Configuration Protocol; lets network administrators manage centrally and automate the assignment of IP addresses in an organizations network.

DHCP

Dynamic Host Configuration Protocol; lets network administrators manage centrally and automate the assignment of IP addresses in an organizations network.

DNS

Domain Name System. A general purpose distributed, replicated, data query service. Its principal use is the lookup of host IP addresses based on host names.

DSP

Digital Signal Processing. It usually refers to the electronic circuit section of a camera capable of processing or enhancing signals.

Dwell Time

The length of time a switcher displays one camera before sequencing to the next.


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