PESA RCP-CSD, Руководство пользователя

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RCP-CSD
36 Glossary
Block
A group of contiguous crosspoints in a routing switcher which form the smallest unit on which
confidence is checked.
Because of the nature of the circuits involved, individual crosspoints cannot be checked to see if
they are operating correctly. Instead, the control circuitry shared by groups of crosspoints is
monitored. These groups of crosspoints, called blocks, vary in size according to product type.
Block size for RM5 routing switchers is 8 inputs by 2 outputs and block size for PRC routing
switchers is 8 inputs by 8 outputs. If any block gives a confidence error, all crosspoints in that
block are assumed to be non-functional.
Block Checking
The continuous, sequential monitoring of confidence for each block in a routing switcher.
Block checking occurs automatically and continuously but can be disabled for troubleshooting
purposes.
Blocked Destination
See: Source Block.
Blocked Source
See: Source Block.
Breakaway Switch
A switch where more than one source is switched to a single destination on multiple levels.
Example: Assume the existence of two sources VTR1 and VTR2 which are defined on levels
VIDEO and AUDIO, and a destination MON1 which is defined on the same levels. VTR1 is
switched to MON1 on the VIDEO level and VTR2 is switched to MON1 on the AUDIO level.
The signal reaching MON1 will have the video from VTR1 and the audio from VTR2, and is a
breakaway switch.
See also: Follow Switch.
Category
The first portion of a source, destination, or reentry name.
Categories provide an easy means of classifying and grouping switching system devices.
An example of a category is VTR which could be used with the indices 1, 2, and 3 to create the
source names VTR 1, VTR 2, and VTR 3.
Category names are one to six characters in length and are constructed using uppercase letters and
numbers. The first character must be a letter. Imbedded spaces are not permitted.
Chop
Rapidly switch two different video signals into a monitor or other piece of test equipment. This is
done to compare some characteristic of the signals, usually for quality control.