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 60/94
3.5.8 Digital precorrection
Characteristics
Typical Value Comment
Feedback Inputs
RF Frequency Band:
470 to 862 MHz
170 to 240 MHz
54 to 88 MHz
Impedance:
50 ohms
Return Loss:
> 13 dB
Nominal Input Level:
-5 to -15 dBm
Max Input Level:
+5 dBm (before damage)
Adjacent Channel Rejection:
No adjacent channel support
Characteristics
Typical Value Comment
Manual Precorrection
Linear Precorrection:
Amplitude:
Group Delay:
32 points
± 3 dB (0.1 dB step)
± 500 ns (10 ns step)
On the overall bandwidth
Adaptive Precorrection
Linear Adaptive Precorrection
Amplitude:
Group Delay:
± 3 dB (0.1 dB step)
± 500 ns (10 ns step)
Non-Linear Adaptive Precorrection
AM/AM:
AM/PM:
± 6 dB (0.05 dB step)
± 25° (0.2° step)
Characteristics
Typical Value Comment
DAP Performances Measurement
RF Feedback Input Levels:
Bar graph 0-100 %
Left and Right Shoulders:
On FBA or FBF input
> 45 dB max
Resolution 1 dB
MER:
On FBA or FBF input
For relative use only
From 20 up to 40 dB Typical
The MER measurement
should not be used as an
absolute value. It can be used
only for variation detection.