User manual
Table Of Contents
- User Manual
- Starlink SL9003Q
- Digital Studio Transmitter Link
- WARRANTY
- SL9003Q Manual Dwg # 602-12016-01 R: G Revision Levels:
- Using This Manual - Overview
- Section 1 System Features and Specifications
- Section 2 Quick Start
- Section 3 Installation
- Section 4 Operation
- Section 5 Module Configuration
- Section 6 Customer Service
- Section 7 System Information
- Table of Contents
- List of Figures
- List of Tables
- 1 System Features and Specifications
- 2 Quick Start
- 3 Installation
- 4 Operation
- 7.1 Introduction
- 7.2 Front Panel Operation
- 4.3 Screen Menu Navigation and Structure
- 7.4 Screen Menu Summaries
- 4.4.1 Meter
- 4.4.2 System: Card View
- 4.4.3 System: Power Supply
- 4.4.4 System: Info
- 4.4.5 System: Basic Card Setup
- 4.4.6 Factory Calibration
- 4.4.7 SYSTEM: UNIT-WIDE PARAMS
- 4.4.8 System: Date/Time
- 4.4.9 System: Transfer
- 4.4.10 System: External I/O (NMS)
- 4.4.11 Alarms/Faults
- 4.4.12 Radio: Modem Status (QAM)
- 4.4.13 Radio TX Status
- 4.4.14 Radio RX Status
- 4.4.15 Radio TX Control
- 4.4.16 Radio RX Control
- 4.4.17 Radio Modem (QAM) Configure
- 4.4.18 Radio TX Configure
- 4.4.19 Radio RX Configure
- 4.4.20 Radio Modem/TX/RX Copy Function
- 4.5 Intelligent Multiplexer PC Interface Software
- 4.6 NMS/CPU PC Interface Software
- 5 Module Configuration
- 6 Customer Service
- 7 System Description
- 8 Appendices
- Appendix A: Path Evaluation Information
- Appendix B: Audio Considerations
- Appendix C: Glossary of Terms
- Appendix D: Microvolt – dBm – Watt Conversion (50 ohms)
- Appendix E: Spectral Emission Masks
- Appendix F: Redundant Backup with TP64 and TPT-2 Transfer Panels
- Appendix G: Optimizing Radio Performance For Hostile Environments
- Appendix H: FCC APPLICATIONS INFORMATION - FCC Form 601
- Starlink SL9003Q & Digital Composite - 950 MHz Band
4-28 Section 4: Operation
Moseley SL9003Q 602-12016 Revision G
Warning on Adjusting Transmit Power
Attempting to increase the transmit power will cause the radio to fail to operate.
Why? The digital QAM modulation used in the SL9003Q though very spectrally efficient
is extremely sensitive
to channel linearity. When shipped from the factory the system is
operating at its maximum transmit efficiency.
The transmitter power amplifier consumes the most current so is operated close to its
peak output power, 10 Watts (+40 dBm) for highest efficiency. This provides a averaged
output power, 1.25 Watts (+31 dBm) and acceptable intermodulation distortion (IMD) for
the receiver to effectively equalize. Increasing the transmit power beyond this factory
set level will generate increase IMD, and result in data errors at the receiver. The higher
order QAM modes are particularly sensitive to IMD.
This IMD issue is also raised with the addition of post-amplification or booster amplifier.
This amplifier must be a linear Class-A amplifier. Class-C power amplifiers used with
analog FM STLs will not work. The post-amplifier compression point should be between
6 dB (16 QAM) and 9 dB (64 QAM) higher than the expected average transmit power.