Overview
IEC 60728-101:2016 is an international standard published by the International Electrotechnical Commission (IEC) addressing cable networks that distribute exclusively digital television and sound channels. Specifically, it focuses on the system performance of forward paths within cable networks, which use coaxial cable outputs operating between approximately 30 MHz and 3000 MHz. The document defines the essential methods for measuring operational characteristics to assess system performance and determine limits.
This standard primarily applies to cable networks including individual receiving systems, ensuring that digital channel delivery via coaxial cable adheres to defined performance criteria. It serves as a foundational guideline for network designers, installers, and maintenance technicians aiming to maintain and optimize digital cable broadcasting infrastructure.
Key Topics
- Scope and Application: Coverage of cable networks loaded solely with digital channels for both television and sound signals.
- Measurement Methods: Detailed processes for measuring system performance parameters at the coaxial cable system outlet.
- Performance Parameters:
- Signal level measurements
- RF signal-to-intermodulation plus noise ratio (S/IN)
- Bit error ratio (BER) and BER versus signal-to-noise (S/N)
- Modulation error ratio (MER)
- Phase jitter and phase noise of RF carriers
- Mutual isolation between system outlets
- Amplitude response within individual channels
- Non-linear distortion effects such as intermodulation and composite crossmodulation
- Performance Requirements:
- Signal levels: Minimum, maximum, and difference allowances at system outlets
- Impedance standards to ensure compatibility at terminal inputs
- Frequency response and group delay limits to maintain signal fidelity
- Long-term frequency stability and random noise control in distribution
- Interference control, including single-frequency and intermodulation noises
- Specific requirements for DVB (Digital Video Broadcasting) and DAB (Digital Audio Broadcasting) technologies including PER (Packet Error Rate) and noise margins
Applications
IEC 60728-101:2016 plays a critical role in the deployment, maintenance, and troubleshooting of cable networks dedicated to digital television and sound distribution through coaxial cables. Its practical applications include:
- Network Design: Guiding engineers on acceptable signal levels, noise margins, and distortion tolerances to ensure robust service delivery.
- System Testing and Commissioning: Outlining the exact test methods and parameters to evaluate system readiness and operational quality.
- Routine Maintenance: Providing benchmarks for ongoing performance checks and diagnostics to prevent service degradation.
- Quality Assurance: Enabling service providers to meet stringent quality metrics for digital channel transmission.
- Interoperability: Ensuring that various equipment and terminals connected to the network meet universal standards for signal quality and compatibility.
This standard is especially relevant for cable operators, manufacturers of coaxial network equipment, and quality auditors in broadcasting infrastructure.
Related Standards
IEC 60728-101:2016 complements several IEC and international standards related to television and sound signal distribution over cable networks, including:
- IEC 60728-1: General requirements for cable distribution systems.
- IEC 60728-2 (Parts 2-x): Focuses on return path performance and measurement.
- DVB Standards (ETSI EN 300 468, EN 300 744): Standards for digital broadcasting modulation and transmission including QAM, PSK, and OFDM techniques referenced in IEC 60728-101 performance tests.
- IEC 60728-11: Specifications on signal distribution equipment for cable networks.
- Related radio frequency (RF) testing standards within IEC that complement noise margin and signal distortion considerations.
Adhering to IEC 60728-101:2016 ensures that digital cable networks are designed and maintained to meet internationally recognized performance metrics, enhancing reliability and user experience in television and sound signal delivery.
Keywords: IEC 60728-101, cable networks standard, digital channels, coaxial cable, system performance, forward path, television signal distribution, sound signal distribution, digital broadcasting cable network, signal measurement IEC, digital TV cable standard, signal-to-noise ratio, bit error ratio, modulation error ratio, DVB cable performance, cable network testing, IEC cable standard.
Open preview (PDF)Cable networks for television signals, sound signals and interactive services - Part 101: System performance of forward paths loaded with digital channels only
