Grass Valley Performer SD - Manual (Page 19)

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Glossary of Terms
level offset The addresses of a level controlled by a control panel which
have been incremented to a higher set of numbers.
level(s) An independently controllable stratum of signals within a
routing switcher. Typically, a routing switcher will have a lev-
el of video and one or more audio levels.
MBCP (MultiBus Control Panel) A router control panel capable of
controlling multiple destinations. The destinations are select-
able on the front panel.
offset Where a set of numbers such as 1 through 10 are incremented
to another range of values such as 11 through 20.
parity A method of verifying the accuracy of transmitted or record-
ed data.
polling address A unique device designation that allows a controller to make
regular status checks of a number of devices on a common
communications bus.
protect The current selection is locked and prevented from accidental
change.
protocol A set of conventions governing the format and timing of mes-
sage exchanges to control data movements and detect errors.
RS232, RS422, RS485 Electrical/mechanical standards for serial communications.
serial bit rate The speed at which bits are transmitted in a serial digital sig-
nal.
SERIM (SERial Interface Module) Translates RS232 and RS422 com-
mands into RS485 format.
slave mode A condition in which a piece of equipment does not act inde-
pendently, but only under the control of another piece of
equipment.
source offset The addresses of the sources controlled by a control panel
which have been incremented to a higher set of numbers.
source The origin of a video &/or audio signal—i.e., video tape re-
corder, video camera, production switcher, etc..
stop bit The indicator in the serial digital communications protocol
that the transfer of one byte is complete.
tally The acknowledgement returned to a control panel or terminal
that an operation has been executed.