Constellation® January 2006
Glossary-2
DADE. Differential Absolute Delay Equalization. A method for aligning, in
time, two identical data streams that are traveling through channels of differing
length (time).
DFM. Dispersive Fade Margin.
D connectors, subminiature. The size of the subminiature D connector is
specified by the standard shell size and the number of connectors. For example,
a 15-pin connector is referred to as a DA-15. See the following table.
DCS. Digital Cross-connect System.
DTMF. Dual-Tone MultiFrequency.
E
EFS. Error-Free Seconds.
EIA. Electronic Industries Association.
EMI. Electro-Magnetic Interference.
ERP. Effective Radiated Power.
ES. Errored Seconds.
ETSI. European Telecommunications Standards Institute.
F
FarScan.
Harris’ network management system software.
FCC. Federal Communications Commission (U.S.).
FD. Frequency Diversity. Diversity transmission and reception in which the
same information signal is transmitted and received simultaneously on two or
more independently fadings carrier frequencies.
FEC. Forward Error Correction.
FFM. Flat Fade Margin.
Standard Shell
Size
No. of
Connectors
E9
A15
B25
C37
D50
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