Grass Valley Apex v.2.0 - Manual (Page 125)

APEX — Installation and Service Manual 127
Glossary
output monitoring
Feature of routing switcher which allows
control system to verify switcher perfor-
mance without interrupting normal opera-
tions. A separate, internal switching system
is used to switch the Monitor Output to any
output of the switcher.
P
path finding
Switching technique allowing two or more
TVS/TAS-2000 or later routing switchers to
operate as a system, where each switcher can
access the other's inputs through a number of
tie lines. Be cause the tie lines are limited, the
path will be blocked when all lines are busy.
Not to be confused with
THREE - STAGE
S WITCHING .
PCI
Peripheral Component Interconnect, a local
computer bus standard developed by Intel
Corporation. Most PCs include a PCI bus in
addition to a more general ISA expansion
bus.
physical level
see LEVEL .
PL board
PL-3000 Party Line Interface.
Pmem
Battery-protected memory.
polling
Communication technique where central
controller polls (addresses) each device on a
party line in turn. When so addressed, a par-
ticular device can then send or receive data
without being interrupted.
polling name
Unique address assigned to a switcher con-
trol panel. When transmitted by the polling
and control card, allows communication be-
tween that panel and the switcher matrix.
PPM
Peak program meter.
protect
On Jupiter control panels with a PROTECT
button: after a given source has been
switched to a given destination, and PRO-
TECT is pressed, the source for that destina-
tion can then be changed only at the panel
which protected the output. Note that a pan-
el can only protect
LEVELS that are assigned to
the panel during configuration. See also
LOCK , and FORCE UNPROTECT / UNLOCK .
primary status instruction
In Jupiter systems, a configuration technique
used in the CP Input set for display of S
PLIT
M NEMONICS . Indirect (“I”) entries are used to
point to a primary (“P”) entry. The primary
entry in turn points to the desired mnemonic
for that level.
R
refresh
Continuous repetition of switching instruc-
tions and confirmation of crosspoint status.
Reports any interruption of service – for ex-
ample, if crosspoint board is removed. When
board is replaced, automatically restores pre-
vious switch instructions.
REM
Reference, expansion, monitor. Internal
name for MX-33000 Matrix board.
remote PC
PC on a Jupiter LAN in addition to the PC
used as the file server. Can be used for auxil-
iary tasks such as remote
LOGGING .