User`s guide

MS-4900, Rev. A G-1
Glossary
access network
the various routes by which data feeds originating in diverse locations come
into the network control center for uplinking to WavePhore networks
acquisition
the process by which the demodulator adjusts frequency, phase, gain, and
code-word synchronization to match that of the incoming carrier and lock to
it.
AGC
Automatic Gain Control. Relative reading of signal strength.
aggregate data
stream
The non-partitioned data uplinked from the network control center and
received in the IDR V1000. The aggregate data stream must be
disassembled, reordered, and usually processed before it can be output to an
external device.
asynchronous
also async. Data transmission mode that transmits one character at a time,
does not use a data clock, and must supply its own start and stop bits and its
own error detection pattern.
AUI
Attachment Unit Interface. A serial connection available only on the IDR
V1000 Ethernet model
BPSK
Bi-Phase Shift Keying. A method of modulation in which zeroes and ones are
represented by two phases of the RF carrier signal which differ by 180
degrees.
CRC
Cyclic Redundancy Check. An effective error detection technique
carrier ID
CID. A WavePhore-assigned number from 0 to 254 that identifies a specific
carrier to the IDR V1000.
cluster
a group of receivers that operates with the same set of characteristics,
enabling them to be simultaneously downloaded with network changes.
codec
coder-decoder
control channel
also network control channel. Information sent by the network control center
to a receiver to control its configuration; not intended for output processing.
data feeds
Transmittal of information from an originating source or from the network
control center.
demodulator
The component in the IDR V1000 that converts an incoming analog signal to
digital data for further processing.