Videotek TVM9100PKG Installation And Operation Handbook page 282

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PRO Audio A transmitted audio channel for talent cueing via Interrupt Foldback
(IFB) to ENG vans and remote applications. Some demodulators support PRO audio
monitoring.
Program A transport stream combination of a video stream and one or more audio
and data streams associated with that video stream. In analog terms, "Program" refers
to the Base Band video and audio produced by the final output of a switcher.
Program Association Table (PAT) A list of all programs that are in the ATSC
data stream.
Program Map Table (PMT) A listing of all elementary streams that comprise a
complete (television) program.
Program Clock Reference (PCR) This is a time reference signal that is placed in
MPEG streams for the purpose of time coordinating various data streams.
Program and System Information Protocol (PSIP) Information sent out as part
of an ATSC transport stream which lists all of the video, audio, data and program
information contained in the stream. This is the "TV guide" for a given stream.
Progressive Scanning Also non-interlaced. A system of video scanning where
lines of a picture are transmitted consecutively, such as with VGA monitor displays.
Push-push Toggle Switch An electro-mechanical device which, when pushed,
alternates the condition of the switch. Push once, it's off, push again, it's on.
Quadrature Output An output in a television demodulator used for measuring
Incidental Carrier Phase Modulation (ICPM) in a transmitter.
QPSK Quadrature Phase Shift Keying, typically used by satellite downlinks.
QAM Quadrature Amplitude Modulation, the technique used by cable TV systems (64-
QAM and 256-QAM) to remodulate signals for distribution in a cable plant.
Quad In the TVM series, this term applies to a screen that contains four panes.
RGB Legalization Limiting of luminance and color difference video signals such
that, once transcoded into RGB component video signals, the resultant video does not
violate the maximum or minimum signal levels as defined by component video level
rules. Typically, the maximum value for R, G, or B is 700 mV, and the absolute
minimum value for any of these signals is 0 mV.
Reclocking The process of regenerating digital data with a clock recovered from the
input data.
Resolution A measure of the finest detail that can be seen, or resolved, in a
reproduced image.
RS Right Surround
RS-422 Recommended Standard number 422, an E.I.A. standard which describes a
type of data interchange. Television products use this standard as its communication
format between the electronics frame and editors, control panel and computers. An
RS-422 line may be extended up to 1,000 feet (304m).
258 TVM Series Installation and Operation Handbook
Copyright © 2008, Harris Corporation