Section 1: System Features & Specifications
1-1
Moseley SL9003Q
602-12016-01 Revision J
1. System Features & Specifications
1.1 System
Introduction
The Moseley STARLINK 9000 is the first all-digital, open-architecture, modular system for
CD-quality audio transmission. The versatility and power of the STARLINK 9000 comes from
a complete range of plug-and-play personality modules.
The SL9003Q Digital Studio-Transmitter Link (DSTL) provides a transmitter/receiver pair
that conveys high quality digital audio across a microwave radio path. Typically, program
material is transmitted from a studio site to a remote transmitter site, to a repeater site, or
in an intercity relay application.
Utilizing spectrally efficient digital Quadrature Amplitude Modulation (QAM) technology, the
SL9003Q delivers four discrete 16/24-bit linear audio channels with RS-232 data over
standard FCC Part 74 (950 MHz) STL frequency allocations.
As a discrete STL, the AES/EBU digital audio I/O, combined with a built-in variable sample
rate converter, provide seamless connection to the all-digital air chain without compression.
The system has provisions for asynchronous auxiliary data channels (up to 38,400 baud)
that are used for communication in remote control applications. Plug-in MPEG audio
modules and a digital multiplexer support additional program, voice, FSK, async and sync
data channels.
The high spectral efficiency of the SL9003Q is achieved by user-selectable 16, 32, 64 or 128
QAM. Powerful Reed-Solomon error correction with interleaving, coupled with 20-tap
adaptive equalization, provide unsurpassed error-free signal robustness in hostile RF
environments for which there is no comparable benefit in analog transmission.
1.2 System
Features
In addition to establishing a new industry standard for studio-transmitter link performance,
the SL9003Q incorporates many new and innovative features:
•
Linear 16/24-bit digital audio performance.
•
Higher system gain, 26 dB more than analog composite STL.
•
Degradation-free multiple hops.
•
Configurable for up to 4 linear audio program channels per STL system.
•
No crosstalk between channels.
•
No background chatter from co-channel or adjacent-channel interference.
•
Built-in AES/EBU digital audio interface.
•
Operation through fractional T1 networks.
•
Built-in data channels alleviate the need for FM subcarrier data channels.
•
Extensive LCD screen status monitoring.
•
Peak-reading LED bar graph display for all audio channels.
•
Adjustable bit error rate threshold indication for monitoring transmission quality.
•
Important status functions implemented with bi-color LED indicators.
•
Modular construction that provides excellent shielding, high reliability, easy servicing,
and upgrade capability.
•
Selectable RF spectral efficiency.
•
Sample rate converter (SRC) for digital audio operation from 30 to 50 kHz.
Summary of Contents for Starlink SL9003Q
Page 86: ...5 22 Section 5 Module Configuration Moseley SL9003Q 602 12016 01 Revision J ...
Page 90: ...6 4 Section 6 Customer Service Moseley SL9003Q 602 12016 01 Revision J ...
Page 110: ...A 10 Appendix A Path Evaluation Information Moseley SL9003Q 602 12016 01 Revision J ...
Page 118: ...D 2 Appendix D Microvolt dBm Watt Conversion 50 ohms Moseley SL9003Q 602 12016 01 Revision J ...