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 11/94
1.1 General overview
EXACT-V2 exciter has been especially designed to support, in addition to ATSC 1.0, the
complex ATSC 3.0 modulation scheme, including Digital Adaptive Pre-correction (DAP)
circuits and all required mechanisms to feed transmitters with flexible and highly
secured input stream formats. This ready-to-use high-end 1RU exciter offers the best-
in-class performance for broadcasters that want to launch ATSC 1.0 or ATSC 3.0
products with a high-performing, secured solution. Enabling users to migrate ATSC 3.0,
reusing and recycling their existing transmission system, this unique exciter
significantly reduces capital expenditure (CAPEX) costs.
In order to bring the highest performance, EXACT-V2 integrates up-to-date FPGA
technology and sophisticated digital signal processing algorithms, especially for the
modulation and the output filtering processes. With this in mind, broadcasters are able
to take full advantage of ATSC 3.0 technology.
The clock system has been carefully designed to reach a very low phase noise and it
achieves the flexibility required to operate with different synchronization schemes.
EXACT-V2 includes a high-stability OCXO oscillator and an on-board GPS receiver. It
generates a fully modulated analogue signal and includes all necessary clock &
synchronization features for high quality ATSC 3.0 synchronization, especially for SFN
networks.
Fully controlled via a user friendly WEB GUI and via SNMP (optional), EXACT-V2 also
features some very unique functionalities such as a Power Measurement Unit
(measuring in real-time the forward and reflected power levels), the TX power ON/OFF
control and the Automatic Gain Control (AGC) mechanism. EXACT-V2 Digital Adaptive
Pre-correction (Digital Adaptive Processing) algorithm, permits transmitter operation
very close to the saturation limit with unequalled RF signal performance and allows for
significant gain in transmitter Power Efficiency. This generates significant savings in
operating expenses (OPEX).
Three Ethernet control ports are available, which provides the opportunity to upgrade
a legacy transmitter configuration into a fully IP-controlled solution!