SIST EN 60835-2-4:2002/A1:2002

Overview

SIST EN 60835-2-4:2002/A1:2002 provides standardized methods of measurement for equipment used in digital microwave radio transmission systems, specifically focusing on terrestrial radio-relay systems. This standard covers critical procedures for measuring the performance of transmitters, receivers, modulators, and demodulators within these systems. The amendment (A1) aligns with the parallel vote in the EN process and incorporates updates from the corresponding IEC standard.

Reliable and reproducible measurement methods are essential for ensuring performance, interoperability, and regulatory compliance in radio-relay communication equipment. This standard is vital for manufacturers, engineers, and testing professionals involved in the design, development, and validation of digital microwave radio transmission systems.

Key Topics

• Transmitter and Receiver Measurement:

  • Performance evaluation of transmitters and receivers in digital microwave systems.
  • Specific focus on the role and testing of modulators and demodulators.

• Selective Fading Signature Measurement:

  • Methods to analyze the impact of multipath propagation, commonly found in terrestrial microwave links.
  • Utilization of two-ray fading simulators to replicate selective fading scenarios.

• Bit Error Rate (BER) Testing:

  • Assessment techniques to determine how various fading conditions affect BER.
  • Procedures for setting notch depth and measuring offset frequencies in fading simulators.

• System Sensitivity Assessments:

  • Comparing system performance and adaptive equalizer sensitivity to multipath effects.
  • Supporting the prediction of outage times caused by selective fading in operational environments.

Applications

SIST EN 60835-2-4:2002/A1:2002 plays a fundamental role in various practical scenarios, including:

• Product Development & Validation:

  • Used by manufacturers of digital microwave radio equipment to verify transmitter and receiver performance under standardized measurement conditions.
  • Ensures equipment meets industry requirements for reliability and robustness in multipath-prone terrestrial settings.

• Type Approval & Acceptance Testing:

  • Laboratories employ these measurement methods for type tests, acceptance tests, and compliance certification.
  • Enables uniformity in testing, supporting regulatory compliance and market approval processes.

• System Optimization & Comparison:

  • Network engineers and designers use measurement data to optimize radio-relay system configurations and compare equipment from multiple vendors.
  • Helps identify suitable equalization and error correction strategies to mitigate selective fading effects.

• Predictive Maintenance & Field Analysis:

  • Results from these measurements guide predictive maintenance plans and the analysis of downtime causes, ultimately improving network uptime and service reliability.

Related Standards

Professionals dealing with digital microwave radio-relay systems should also be aware of the following related standards:

• EN 60835-2-8: Addresses measurement methods for BER in radio-relay equipment and is cited within this standard for test arrangement reference.
• IEC 60835 Series: Comprises a suite of standards covering broader methods for measurement and specification within digital microwave transmission systems.
• EN 302 217: Focused on characteristics and requirements for fixed radio systems, often relevant for harmonization with European requirements.
• IEC 60834: Provides requirements and performance criteria for analog and digital communication systems, complementing the scope of EN 60835-2-4.

Practical Value

Implementing SIST EN 60835-2-4:2002/A1:2002 ensures consistent, repeatable, and internationally recognized approaches for measuring vital parameters in digital microwave radio equipment. By following these standardized measurement methods, organizations can not only achieve regulatory compliance but also enhance the overall quality, resilience, and performance of terrestrial radio-relay systems in demanding communication environments.

Keywords: digital microwave radio, terrestrial radio-relay, transmitter measurement, receiver testing, selective fading, bit error rate, multipath propagation, modulators, demodulators, performance validation, SIST standard, IEC 60835-2-4.