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80 Pelco Manual C1515M-A (11/01)
GLOSSARY
Term Definition
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.
Alarm display format The CM6800 Matrix Switcher provides four formats for
displaying alarmed cameras on system monitors: Block
Build, Chronological Pair, Reverse Chronological Pair,
and Salvo Group.
Alarm group To display on a monitor, an alarm must be assigned to
one or more alarm groups. The CM6800-48X8 Matrix
Switcher provides eight alarm groups (A through H). The
CM6800-32X6 Matrix Switcher provides six alarm groups
(A through F). Refer to Alarm Groups and Alarm Group
Display Options.
Alarm priority A priority alarm appears on system monitors before a non-
priority alarm. Refer to the Priority description under
Internal and External Alarms.
ASCII The binary, 7-bit, 128-character set implemented as the
standard in communications.
Auxiliary Output relays can be used to control external devices
based on matrix switcher activities. External devices can
include VCRs, alarm devices, and triggers for audio
circuits.
Baud rate In video, the greater the speed, the larger amount of
information passed. In digital systems, this capacity is
given in bits per second, or baud rates.
Bit An abbreviation for “binary digit” - the smallest unit of
information a computer can use. A bit is either a 1 or a 0
(a high or low voltage state).
Byte An abbreviation for “binary term” – bytes are strings of
bits, operated upon as a unit. A byte is equal to eight bits
(256 possibilities) and is large enough to hold one
character (like an “A” or the number “1”.)
Camera auxiliary Some cameras contain an auxiliary output relay, which
can be used to operate a device connected to the relay.
Coaxitron This is Pelco’s “up the coax” control technology. Control
signals are sent back up the coaxial cable that the video
signal travels down on.
COM port This is a communication port input on the rear panel of the
matrix switcher.
Daisy-chain This is a way of providing multiple connections in a series,
from one source. A daisy-chain configuration connects
multiple, linked devices from one output. When connecting
PTZ cameras to a matrix switcher, for example, one set of
cables connects the matrix switcher to each receiver, and
then each receiver is connected to the next receiver.
Dwell This is the amount of time something happens in the
system, such as the amount of time a camera view
displays on a monitor, or an auxiliary is on.
Glossary