User's Guide

Solo7 Nano Transmitter
Commercial in
Confidence
Video, Transmitters, Solo7 Nano
Transmitter
100145
Revision: 8.0
Commercial in
Confidence
Page 7-57
No
Name
Options
Notes
2
Constellation
QPSK, 16QAM and
64QAM
The COFDM constellation in use.
QPSK-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.
3
FEC Rate
1/2, 2/3, 3/4, 5/6
and 7/8
The forward error correction (FEC) rate
which is being applied to the DVBT mode in
use.
Think ‘data bits/all bits’
1/2 means 1 bit out of 2 bits is data and
therefore 1 bit is used for error correction.
Little user data means less picture quality,
but more error correction means a more
robust signal and therefore more range.
7/8 means 7 bits out of 8 bits are data and
therefore 1 bit is used for error correction.
More user data means better picture
quality, but less error correction means less
robust signal and therefore less range.
4
Guard Interval
1/32, 1/16, 1/8
and 1/4
The guard interval which is being applied to
the DVBT mode in use.
The guard interval is a deliberate extension
of the RF symbol period to give immunity to
reflections.
1/32, short extension, deals with fast
reflections, more data, less range.
1/4, long extension, deals with slower
reflections, less data, more range.
Table 7-11 – DVB-T Settings Key