IEC 60728-1:2014

Overview - IEC 60728-1:2014 (System performance of forward paths)

IEC 60728-1:2014 is the fifth-edition international standard for cable networks for television, sound and interactive services, focusing on the system performance of forward paths with coaxial cable outputs (approx. 30 MHz to 3 000 MHz). It defines measurement methods and performance limits used to assess operational characteristics of distribution networks, individual receiving systems and home network interfaces (HNI). This edition updates measurement procedures to include DVB‑T2 and adds references to IEC 60728-1-1 (home networks) and IEC 60728-1-2 (system outlet performance in operation).

Key topics and technical requirements

The standard covers measurement techniques, parameters and acceptance criteria critical to cable network quality:

• Measurement methods at the system outlet - procedures for verifying performance at subscriber outlets and HNIs.
• Signal level and carrier requirements - minimum/maximum carrier levels, carrier level differences and long-term stability.
• Frequency and amplitude response - within-channel amplitude response, group delay and chrominance/luminance inequalities.
• Noise and interference metrics - random noise, carrier-to-noise (C/N), intermodulation, cross‑modulation, composite beat and hum modulation.
• Digitally modulated signals - test methods and requirements for DVB (PSK, QAM, OFDM), including BER, MER, noise margin and phase jitter measurements.
• Non-linear distortion - intermodulation, composite crossmodulation and intermodulation noise assessments.
• Echoes and delay - echo measurement, data echo rating and delay inequality.
• Home network interfaces - HNI1/HNI2/HNI3 requirements for passive/active/coaxial and balanced home networks.
• Receiving antenna performance - field strength measurement and quality/safety/EMC considerations.

The standard lists test equipment, connection setups and result presentation formats for reproducible, comparable testing.

Practical applications and who uses it

IEC 60728-1:2014 is used by:

• Cable network designers and operators for system design, commissioning and performance verification.
• Field/test engineers and installers for acceptance testing, troubleshooting and maintenance.
• Equipment manufacturers to ensure modems, amplifiers, splitters and set‑top devices meet network performance limits.
• Regulators and certification bodies for compliance testing and consumer protection.
• Broadcasters and service providers to validate delivery quality for DVB‑T2, QAM and other codecs.

Typical tasks: measuring carrier levels and C/N at outlets, checking MER/BER for digital services, verifying isolation between outlets, and ensuring compliance at the HNI.

Related standards

• IEC 60728-1-1 - home networks (passive/coaxial guidance)
• IEC 60728-1-2 - operational performance requirements at system outlet

Keywords: IEC 60728-1:2014, cable networks, coaxial, DVB‑T2, system performance, forward path, measurement methods, BER, MER, carrier-to-noise, intermodulation, home network interface.