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 33/94
The figure below shows the entire VX20-x0x2 synchronization processing block (the
on-board GPS being depicted as “GPS receiver”):
Figure 13: VX20-x0x2 synchronization processing block
Then, depending on the user’s setup, three cases can be considered:
1) Working with external GPS signal reference (using on-board GPS receiver):
Figure 14: VX20-x0x2 clock synchronization - GPS signal
In this case, the modulator processes the 1PPS due to the on-board GPS receiver. The
GPS reference signal is available on GPS In interface. This 1PPS reference signal is used
both for temporal synchronization and 10 MHz PLL locking. The 1 PPS I/O can be
configured as an output to provide a 1PPS signal to other equipment.