Harmonic ProView 7000 User Manual page 202

Glossary
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Numerics A B
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DB-9
A 9-pin connector used to connect communications and other electronic devices. It is commonly
used for
TIA-232
dBm
Power ratio in decibels (dB) of the measured power referenced to one milliwatt.
DBS
Direct Broadcast Satellite. Describes a video entertainment broadcasting system over satellite to
receivers at the customer (end user) home.
DCII
DigiCipher 2
DCE
Data Communications Equipment. A device that communicates with a DTE over
example, a modem is a DCE that sends to and accepts data from a host computer (DTE). See
also .
DTE
DD
Dolby Digital. See
decoder
A device that converts an compressed signal back to baseband video and audio.
demultiplex
The conversion of several intermixed signals to l separate signals.
DHCP
Dynamic Host Configuration Protocol.
DHEI
Digital Headend Expansion Interface. An proprietary (Motorola) interface protocol for carrying
MPEG-2 transport streams between headend equipment.
DHOM
A card for the MN20 multiplex. The DHOM accepts DVB-ASI protocol input from the
and translates it to DHEI output. The DHOM provides three DVB-ASI input ports and three
DHEI output ports.
differential transmission
The sending of the positive and negative aspects of a data signal so that it arrives undistorted. See
also
balanced audio
DIM
A card for the MN20 multiplex. Accepts either formatted or unformatted data on an
connection and packetizes this data for transmission in an MPEG-2
© 2011 Harmonic Inc.
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and similar interfaces.
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AC-3
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G H I J
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U V W Y
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202
L M N O
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TIA-232
Ethernet
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Transport Stream
ProView 7000 v.2.4, Rev. A
P
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MOM