Pelco CM6800E-48X8 RS-422, Recommended distance is 4,000 feet 1,219 m, All four wires, Sequence

RS-422	This is an Electronics Industry Association (EIA) interface standard. Pelco uses this standard for
	communication from a controller to one or more camera receivers (on the same line); the maximum
	recommended distance is 4,000 feet (1,219 m).
	The four-wire connection provides two wires for transmit and two wires for receive. Pelco receiver/
	driver communication uses only the two transmit wires (commands are sent from the controller to the
	receiver only; the receiver does not “talk” back to the controller). Pelco keyboard communication uses
	all four wires.
	NOTE: The electrical communication scheme used by Pelco is a direct-coupled method, not an AC-
	coupled method. Therefore, if the ground potential of the wire at its two end points is different (other
	than zero volts), an additional wire is required as a ground.
RS-485	This is an Electronics Industry Association (EIA) interface standard used for communication between
	multiple transmitters and receivers; the maximum recommended distance is 4,000 feet (1,219 m). The
	four-wire connection provides two wires for transmit and two wires for receive.
	NOTE: The electrical communication scheme used by Pelco is a direct-coupled method, not an AC-
	coupled method. Therefore, if the ground potential of the wire at its two end points is different (other
	than zero volts), an additional wire is required as a ground.
Scratchpad sequence	A scratchpad sequence can be run on an individual system monitor, without entering the password-
	protected CM6800E Matrix Switcher on-screen programming menus. You can program scratchpad
	sequences from the CM6800E Matrix Switcher on-screen programming menus only, not from the
	CM6800-MGR software.
Sequence	Allows an operator to see a routine of 72 camera views on any system monitor, over and over again.
	The sequence can be operated automatically or manually. The order in which the camera views
	appear and the time each view remains can be programmed.
Standard Coaxitron	This is Pelco’s Coaxitron control technology that uses 15 bits to send a command.
Star configuration	This is a way of providing multiple direct connections from one source. A star configuration uses a
	separate cable for each direct connection, with all of the cables connected to a central device. When
	connecting PTZ cameras to a matrix switcher, for example, the central device can be a code
	distribution unit, such as the CM9760-CDU-T. Each camera has a direct connection to the CM9760-
	CDU-T, which is the central device.
Synchronize	Since the CM6800E Matrix Switcher can be programmed from either the CM6800-MGR software or
	the CM6800E Matrix Switcher on-screen programming menus, you could potentially have different
	settings in the two programming sources. Pelco recommends transmitting any programming changes
	from the updated programming source so that the next time you make changes from either
	programming source, you will be modifying the current system settings. Refer to Transmit
	Programming Settings in the CM6800-MGR Installation/Operation manual.
System keyboard	This is a keyboard compatible with and connected to the matrix switcher, allowing a system operator
	manual control over the system.
System reset	This restores the system to the default settings, as shipped from the factory.
Vertical drive/synchronization	This option sends a timing pulse from the matrix switcher to a compatible camera. The camera aligns
	the vertical synchronization with the timing pulse.
Zone	A zone is a user-defined, physical location to which (1) a label is attached and (2) a camera is
	associated. When the associated camera is panned through or remains within this defined zone, the
	zone label appears on the monitor. With some camera systems, a zone can be blanked to prevent
	viewing while the camera is positioned in the zone.

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