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 28/94
from 8dB to 20dB. The default value is 10 dB, meaning that a light crest factor reduction
is performed.
The following figures display the Crest Factor parameter impact on a signal:
Crest Factor
setting = 20dB
(No reduction)
Without any crest factor
reduction, the PAPR is 14.4dB
Crest Factor
setting = 11dB
After the adjustment, PAPR is
10.8dB
Note: In the screenshots above, the measurements are made using the <RF> value
because the crest factor limit is fixed in the modulator using the RF value.
Please note that some equipment may consider the <ENV> (Envelope)
value, which is also commonly used and is about 3db less.