Glossary
© 2013 Harmonic Inc.
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Ellipse 3000 r.3.0, Rev. B
NTP
Network Time Protocol. Allows you to synchronize the clock of the device with the network
clock.
NPVR
Network Personal Video Recorder.
NTSC
National Television Systems Committee. This committee created the analog composite
television standard once used in the United States, Japan, and several other countries. The
standard transmits 525 lines at 29.97 (30/1.001) fields per second (interlaced) in the United
States, Canada, and Mexico, and 525 lines at 30 fields per second (interlaced) in Japan. See
also
.
NVOD
Near Video on Demand.
NVRAM
Non-Volatile Random Access Memory. NVRAM is usually implemented using static RAM with
a battery backup system, which enables it to retain data after the power is turned off.
O
OAM
Operations and Management. OAM is responsible for control and management of the
system, including configuration, fault detection, and alarm reporting.
On-board adapter
A variant of the AHC audio adapter mounted on the video compression card of an Ion SD, Ion
HD, Electra 5400, Electra 7000, or Electra 8000 encoder.
OIM
OC-3/ATM input module. Receives an MPEG-2 TS over a 155-Mbps ATM optical interface.
OPEX
Operating expense.
OS
Operating system.
OSD
Onscreen Display. Text and graphics which is displayed on the monitor while a program is
being viewed.