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Pelco Manual C1515M-A (11/01) 81
Event timer The matrix switcher can automatically initiate macros or
sequences based on time and date.
Extended Coaxitron This is Pelco’s Coaxitron control technology that uses 32
bits to send a command.
Frame scan A three-second camera scan followed by a three-second
pause.
Latching operation The auxiliary device remains on until a command is given
(by a system operator or system automation) to turn it off.
Logical camera number A user-selectable, variable number, which is associated
with an actual physical camera input on the rear panel of
the matrix switcher.
Macro A sequence of commands or steps. Macros can be
operated automatically or manually. Automatic operation
can be based on specific times or dates (set through the
Event Timer).
Matrix switcher This is also known as a cross-point switcher. The cross-
points are actually electronic switches that select any
video input onto any video output at any one time,
preserving the video impedance matching. One video
signal can simultaneously be selected on more than one
output. More than one video input can be selected on one
output, in a sequential switching between inputs (unless
the input is routed through a multiplexer, which allows
more than one input to be viewed on the output monitor at
any one time).
Momentary operation The auxiliary output operation is activated briefly and then
turns off.
Multiplexer (MUX) A multiplexer allows an operator to view more than one
video signal (usually either four, nine or sixteen signals) at
one time on a single monitor. A multiplexer can also send
these multiple images to the video recorder, switching
rapidly between image from each camera.
NTSC The American color TV standard, used in North America,
Japan, and a few other countries. It specifies 525 lines/
screen, and 29-30 frames/sec.
Null modem cable A null modem cable allows you to connect your PC to
another nearby PC or serial device by “crossing over”
(reversing) their respective pin contacts. (A null modem
cable is limited to 30 feet in length.)
PAL The color TV standard (50Hz) used by European, Asian,
and some Latin American countries. It specifies 768
pixels/line, 576 lines/screen and 25 frames/sec.
Parity type The parity bit is used to identify whether the bits being
moved arrived successfully. Parity bit checking can be
based on odd or even bits. No parity means that a parity
bit is not transmitted or checked.
Partitioning (access) The CM6800 allows you to restrict system control by (1)
limiting the monitors or cameras a keyboard can access,
or (2) limiting the cameras that can be viewed on a
monitor.
Glossary