GRASS VALLEY APEX -, Installation And Service Manual

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APEX — Installation and Service Manual 125
Glossary
SMPTE 259M-1997
Television standard: “10-Bit 4:2:2 Compo-
nent and 4fsc Composite Digital Signals - Se-
rial Digital Interface.”
SMPTE 269M-1999
Television standard - “Fault Reporting in
Television Systems.”
SMPTE 274M-1998
Television standard: “1920 x 1080 Scanning
and Analog and Parallel Digital Interfaces
for Multiple Picture Rates.”
SMPTE 292M-1998
Television standard: “Bit-Serial Digital Inter-
face for High-Definition Television Sys-
tems.”
SNMP
Simple Network Management Protocol.
SPD
Signal presence detector.
SPDIF
Sony/Philips digital interface.
split
see
BREAKAWAY
.
status
In a distribution switcher, a display indicat-
ing what source is currently switched to a
given destination.
sticky levels
Control panel
BREAKAWAY
operation during
which the selected
LEVELS
remain selected af-
ter a Take.
super crosspoint bus
see
CROSSPOINT BUS
.
super party line
see
PARTY LINE
.
T
three-stage switching
Architecture used for very large switchers as
a means of reducing crosspoints needed for a
given number of inputs/outputs. An array
of relatively small matrixes is arranged in an
input stage, an intermediate stage, and an
output stage. The path taken by a given sig-
nal through these stages is determined by
software and will vary according to which
circuits are already in use. Unlike
PATH FIND
-
ING
between two discrete switchers, three-
stage switchers are carefully designed so that
all inputs are always available at all outputs;
i.e., the switcher cannot be
blocked.
tie line
see
PATH FINDING
.
TDM
Time Domain Multiplexing.
tributary
Term used in ES
BUS
documentation for an in-
telligent device (such as a VTR or control
panel) connected to an ES
BUS
.
V
VDE
Verband Deutscher Electrotechniker e.V.
(Union of German Electrical Engineers). Pro-
fessional organization in Germany autho-
rized to conduct product safety tests.
VITC
Vertical Interval Time Code, embedded in
the vertical interval of the video signal.
VGA Status Display
Built-in switcher and machine control status
display feature of the VM 3000. Can be con-
trolled by front-panel buttons or with op-
tional VC 3020 panel.