Harmonic ProView 7000 - Page 225

Glossary
Numerics  A B C  D E F G H I J L M N O P 
Q R S T U V W Y 
© 2011 Harmonic Inc. 225 ProView 7000 v.2.4, Rev. A
Temporal activity
The amount of change in the video source from one frame to the next.
The temporal activity value is the average of the temporal activity for all frames during the
sampling period. In IRIS, the range for temporal activity is from 0 to 100. Sports sequences with
lot of motion will have a high temporal activity value. For a still frame, the temporal activity value
is zero, regardless of the image.
terminal block
A connector used to attach a wire or set of wires.
terminal system remultiplex
The remultiplex that performs the final level of multiplexing. In system architecture, this
component is just before the uplink modulator or other channel encoder. This designation is
important because this component has tasks that are specific to its placement in the topology.
TFTP
Trivial File Transfer Protocol. A simple form of the file transfer protocol (FTP). TFTP uses the
user datagram protocol (
UDP ). It is often used by servers to boot diskless workstations, X-
terminals, and routers.
TIA
Telecommunications Industry Association.
TIA-232
A TIA standard interface for connecting serial devices, such as modems, mice, and serial printers
to a DTE. TIA-232 supports the 25-pin D-type connector (DB-25) and a 9-pin D-type connector
(DB-9).
TIA-485
A TIA standard interface for multipoint serial communications. It supports several types of
connectors, including DB-9 and DB-37. TIA-485 can support more nodes per line than TIA-232.
TOT
Time Offset table.
topology
In NMX, a graphical representation of the components that comprise a broadcast encoding
system (environment). Icons represent the various components. Lines between components
indicate physical connections.
tp
transponder