GRASS VALLEY JUPITER L - V2.1.0 Instruction Manual page 206

Glossary
J
L
level
Historically, a switcher matrix that carries
one type of signal, as determined by DIP
switch settings on crosspoint boards. Exam-
ple: level 1 for video, levels 2 and 4 for left
and right audio, etc. However, in 3-stage
switching systems this switch-set level is re-
ferred to as the "physical" level; and large
systems may require more than one physical
level to provide enough hardware for an en-
tire "logical" level (such as video). The Jupi-
ter Physical Switching menu refers to a
"logical level" that is actually the logical lev-
el number, this being the row number on
which the level is identified on the Switcher
Level Descriptions table. The logical level
name also appears on this table.
lock
On Jupiter/L-S series Control panels
equipped with a LOCK button: after a given
Source has been switched to a given Destina-
tion, and LOCK is pressed, the Source for
that Destination can then be changed only at
the panel which set the lock; and only after
LOCK is pressed again.
LOS
Loss of Signal.
M
MAC address
See
HARDWARE ADDRESS
MADI
Multiplexed Audio Digital Interface. matrix
bus
see
CROSSPOINT BUS
206
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JUPITER L-S and LCD Series Control Panel Instruction Manual
MDI
Multiple Document Interface.
MIDI
Musical Instrument Digital Interface. Serial
interface bus used in Triton switchers.
mnemonic
Abbreviation, usually four characters long,
for a particular input or output. Mnemonics
appear in the LED status windows of the
Control panels. However, the term is some-
times used to define an input or output in the
sense of a logical device name.
MPK
Message-per-keystroke. Protocol developed
by Thomson for Control panels and devices
connected to the Jupiter Serial bus. Baud rate
is variable, with 8 data bits, 1 start bit, 1 stop
bit, and even parity; time out is 6 characters
(1.72 msec). Note: the Jupiter "MPK Table" is
used to identify control devices whether or
not they actually use the MPK protocol.
multicast
see .
IP MULTICAST
N
native protocol
GV Series 7000 Signal Management System
Protocol via RS-232, RS-422, SLIP, or Ether-
net. Maestro commands to an Encore control
system use this protocol.
node
Device on a network, such as a controller
board, control panel, file server, or VTR.
numeric mode
Switcher selection method using input and
output numbers only (as opposed to catego-
ry/number mode).