User's Guide
Table Of Contents
- SOLO7 Transmitter User Guide
- 0. Preface
- 1. Product Overview
- 2. Product Package
- 3. Controls, Connections and Indicators
- 4. Getting Started
- 5. Domo Device Controller Operation
- 6. Advanced Operation
- 7. Appendix A – Reference Material
- 8. Appendix B – After-Sales Support
- 9. Appendix C – Safety and Maintenance
- 10. Appendix D – Glossary
Revision 19.1
SOLO7 Transmitter User Guide
Copyright © 2013 Domo Tactical Communications (DTC) Limited. All rights reserved.
Commercial in Confidence
Page 5-23
Name Options Notes
Guard Interval 1/16
1/8
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.
5.5.4 DVB-T Settings
If you selected DVB-T for the Modulation scheme, these settings need to be configured.
Name Options Notes
Dual Pedestal No or Yes Dual Pedestal mode will double the bitrate by using two adjacent COFDM
channels with an approximate 1.5MHz separation. i.e. DVB-T 8MHz in
dual pedestal mode will give a total bandwidth of 17.5MHz. See
Figure
5-1
.
Bandwidth
6MHz
7MHz
8MHz
DVB-T modes provide excellent data throughput but shorter range than
DTC Narrowband modes.
Typically, bandwidth requirements for DVB-T depend on location and
channel licensing. User data rates and range also vary slight between
bandwidths.
Constellation QPSK
16QAM
64QAM
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.
FEC Rate
1/2
2/3
3/4
5/6
7/8
The forward error correction (FEC) rate.
1/2 – 1 bit out of 2 bits is data and 1 bit is for error correction.
7/8 – 7 bits out of 8 bits are data and 1 bit is for error correction.
More user data means better picture quality, but less error correction
means less robust signal and thus less range.