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lower frequency (called intermediate frequency or IF).
These lower frequencies travel through cables with much
less attenuation of the signal, so there is much more
signal left on the satellite receiver end of the cable. It is
also much easier and cheaper to design electronic circuits
to operate at these lower frequencies, rather than the very
high frequencies of satellite transmission.
PID Stands for Packet Identifier. This is a set of numbers
identifying stream packets contained within a single data
stream
Polarization The orientation of the electrical and magnetic fields of a
signal. Satellites use mainly vertical and horizontal
polarization.
S/PDIF Stands for Sony/Philips Digital Interconnect Format. A
common use for the S/PDIF interface is to carry
compressed digital audio as defined by the standard IEC
61937. This mode is used to connect the output of a DVD
player to a home theater receiver that supports Dolby
Digital or DTS surround sound. Another common use is to
carry uncompressed digital audio from a CD player to a
receiver. This specification also allows for the coupling of
personal computer digital sound (if equipped) via optical
or coax to Dolby or DTS capable receivers.
SCART A French-originated standard and associated 21-pin
connector for connecting audio-visual (AV) equipment
together. SCART is one of the most common method
of connecting audio-visual equipment together. However,
transferring analogue standard-definition content, SCART
