User's Manual
Table Of Contents
- 1 System Overview
- 2 Features Summary
- 3 EXACT-V2 Rack
- 3.1 EXACT-V2 mechanics
- 3.2 Interface characteristics
- 3.3 Front Panel signalization (LEDs description)
- 3.4 Power requirements
- 3.5 Performances and technical characteristics
- 3.5.1 General characteristics
- 3.5.2 Control and data Ethernet interfaces
- 3.5.3 Serial control interfaces
- 3.5.4 ASI inputs / output and MPEG-TS processing
- 3.5.5 Digital modulation
- 3.5.6 Clock synchronization
- 3.5.7 RF and monitoring outputs
- 3.5.8 Digital precorrection
- 3.5.9 Power level measurement inputs and AGC
- 3.5.10 Dry contacts
- 3.6 Conformity with EC Directive
- 4 EXACT-V2 Installation
- 5 Operation
- 6 Maintenance & Troubleshooting
- Appendix A GPS Installation Recommendations
- Appendix B Example of GPS Antenna
USER
MANUAL
MPD-1611291-A
EXACT-V2 High End Rack Modulator / Exciter
3/10/2017
MPD-1611291-A
Page 20/94
2.6 Digital Precorrection
The digital pre-correction feature is available for both ATSC 1.0 and ATSC 3.0 signal
waveforms.
The digital precorrection feature consists of two types of correction:
o Linear precorrection for compensating the distortion due to the channel
filter
o Non-linear precorrection in order to cope with the power amplifier
distortion
Digital precorrection can be:
adaptive: running automatically thanks to an internal (DAP) algorithm
manual: curves are set via TuneCast software (using IP connection)
The EXACT-V2 product integrates both Linear and Non-Linear Digital Adaptive
Precorrection, as well as Linear manual precorrection.
Figure 3: Linear & Non-Linear Precorrection methods