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CCTV GLOSSARY
CCTV ARTICLES
T
Telephoto lens:
is a type of lens used to view far away objects. It has a magnification ratio > 1.

Terminal strip:
is a clamp used to secure the cables firmly to the housing base.

Test pattern generator:
is a device which generates a test pattern to be used to adjust and test the monitor.

Thermal paper:
is a special type of paper used in video printers.

Time based switching:
is a feature in matrix switchers which allows various programmed camera sequences to be initiated at various times.

Time lapse VCR:
is a type of video cassette recorder especially designed for CCTV requirements. It allows more recording time on a single video tape by not recording all the frames.

Time/date generator:
is a device which generates time and a date superimposes it on the video signal.

Touch screen:
is a type of modern monitor screen. Action can be initiated by touching the relevant point on the monitor screen.

Trapezoidal distortion:
is a type of distortion in the monitor caused due to non uniform scanning which makes the scanning lines look wider at the top than at the bottom of the monitor.

Triaxial cable:
is a type of co axial cable which has two layers of shield to provide better protection against EMI.

Twisted pair cable:
is a type of balanced cable in which a pair of cables are twisted and the signal is divided between them.

Two speed recorder:
is a type of domestic use VCR which has two speeds of recording/playback, standard and long play. The long play mode doubles the recording time of a standard tape.

 
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