AEON Family User Guide
Commercial in Confidence
Video, Broadcast
100249
Revision: 1.0
Commercial in Confidence
Page
5-35
Property
Value
Description
PA Linearity
High
Low
High linearity, improves COFDM shoulder performance at
the expense of power consumption.
Usually used when working with power amplifiers which
must have excellent shoulder performance, or for
improved adjacent channel performance.
DVB-T or NB/UMVL Settings Pane
Note
: The properties of this pane will change depending on the
Modulation
Mode
selected. Some of the
options may not be available for the selected Mode.
Property
Value
Description
Bandwidth
625kHz
1.25MHz
2.5MHz
6MHz
7MHz
8MHz
DVB-T
modes give excellent data throughput but shorter
range than Narrowband modes.
Narrowband
modes give excellent range and best use of
available channel bandwidth.
Ultra Mobile Video Link
modes give higher data
throughput than Narrowband by using the same
bandwidths as DVB-T. UMVL will give an advantage over
DVB-T at C/X-band in short range mobile environments.
Constellation
QPSK
16-QAM
64-QAM
BPSK
8-PSK
The COFDM constellation in use.
QPSK, BPSK and 8-PSK - less user data, more robust,
more range.
16QAM - more user data, less robust, less range (link
performance reduced by 5db).
64QAM - max user data, least robust, least range.
FEC Rate
1/2
1/3
2/3
3/4
5/6
7/8
The forward error correction (FEC) rate.
1/2 means 1 bit out of 2 bits is data and thus 1 bit is
used for error correction.
7/8 means 7 bits out of 8 bits are data and thus 1 bit is
used for error correction.
More user data means better picture quality, but less error
correction means less robust signal and thus less range.
Guard Interval
1/32
1/16
1/8
1/4
The guard interval is an extension of the RF symbol period
to give immunity to reflections.
1/32 deals with fast reflections, more data, less range.
1/4 deals with slower reflections, less data, more range.
