SAES-T-521 PDF - Circuit Measuring Techniques - PDFYAR - Engineering Notes, Documents & Lectures

This article is about SAES-T-521 which is about Circuit Measuring Techniques and download SAES-T-521 PDF for telecommunication and electrical engineers, supervisors and project managers, telecom QCs, telecom QC Supervisors. This is saudi aramco standards of Telecommunication Engineering based on international codes and standards and useful for telecom and electronics engineering knowledge to get job as engineers, QC Supervisors and QC managers, Engineering managers and technicians.

SAES-T-521 PDF Download

SAES-T-521

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Circuit Measuring Techniques

SAES-T-521 is a Saudi Aramco Engineering Standard that provides recommendations for test equipment used in measuring the performance of data communications channels and the operating performance of data communications equipment. It also includes methods for making these measurements, fault-finding techniques, and recommended practices for preventative maintenance of data communication channels.

This standard serves as a reference document for individuals involved in the provision and maintenance of data communications within Saudi Aramco. It provides guidance on selecting appropriate test equipment, conducting measurements, diagnosing faults, and implementing preventive maintenance practices to ensure reliable and efficient data communication systems.

By following the recommendations outlined in SAES-T-521, personnel responsible for data communications can effectively assess the performance of channels and equipment, troubleshoot issues, and implement preventive measures to maintain optimal communication functionality.

General

Recognizing North American Standards: The Saudi Aramco communications network is based on North American equipment and standards. The standard acknowledges that technicians are most familiar with these standards and operating practices.
Circuit Test Equipment and Procedures: Section 3 of the standard suggests test equipment to be used for the Saudi Aramco data network. It outlines the methods for measuring voiceband and baseband circuits and provides recommendations for provision and fault-finding.
Operating Performance Measurement: Section 4 describes the methods for measuring the operating performance of point-to-point and multipoint circuits. It emphasizes performing bit error rate testing and protocol monitoring.
Handbook Consultation: The standard advises referring to the handbook associated with each test equipment for a detailed explanation of measurements or control settings.
Preventative Maintenance and General Practices: Section 6 recommends procedures for preventative maintenance and general practices to ensure efficient and reliable performance of the data communication system.
Manufacturer Reference: The standard mentions that reference to a specific manufacturer is for the purpose of describing the type, specification, and quality of the product. Purchased items can be from any manufacturer that meets the technical requirements.

Overall, SAES-T-521 serves as a comprehensive guide for personnel involved in the provision and maintenance of data communications within Saudi Aramco. It provides equipment recommendations, measurement methods, fault-finding techniques, and preventive maintenance procedures to ensure optimal performance and reliability of the data communication system.

Test Equipment

Test equipment required for data communications and provides specific recommendations. Here are the key points:

Division of Test Equipment: The test equipment for data communications is divided into two sections. The first section includes equipment for testing and commissioning analog transmission parameters. The second section includes equipment for objective measurement of circuit performance, which interfaces with a modem and simulates data sources and sinks.
Bit Error Rate Tester and Protocol Monitoring Device: The standard mentions that the suggested equipment for Bit Error Rate testing and protocol monitoring is not currently available for evaluation within Saudi Aramco Operations (SAO). However, based on vendor specifications, they are believed to meet the requirements. It is recommended to gain hands-on experience before making a firm recommendation.
Test Equipment Details: The test equipment for circuits is detailed in paragraphs 5.3 and 5.4, while the equipment for performance measurement is detailed in paragraphs 5.5 and 5.6.
Level Measuring Set: For field technicians, a level measuring set is necessary to measure signal levels at user locations for commissioning testing and fault localization. The instrument should be small, rugged, portable, and easy to use. It should include a dB meter, a test oscillator, and a selection of terminating impedances. Optional features may include noise and frequency measurement facilities.
Recommended Item: The recommended item for the level measuring set is the Hewlett-Packard 3551 A. An alternative option is the Halcyon 701 A.

It’s important to note that the information provided is based on the SAES-T-521 standard, and specific equipment recommendations may be subject to change or updates. It is advisable to refer to the latest version of the standard or consult with relevant experts for the most up-to-date and accurate information.

Transmission Impairment Measuring Set

The SAES-T-521 standard also specifies the requirements for a Transmission Impairment Measuring Set. Here are the key points:

Purpose: The Transmission Impairment Measuring Set is used to ensure that an FDM (Frequency Division Multiplexing) carrier channel meets the required standard for data transmission during circuit commissioning. It is also used to determine the cause of any subsequent failure to meet the standard.
Measurement Techniques: The instrument should use the measurement techniques specified in Bell System Technical Reference Pub. 41009: Transmission Parameters Affecting Voiceband Data Transmission-Measuring Techniques, May 1975.
Operating Manual: The instrument should be accompanied by a comprehensive operating manual that explains the control positions for each measurement.
Training and Practice: The instrument is not a simple test set, and users will require training and practice to use it effectively.
Measured Parameters: The instrument should be capable of measuring the following parameters:

Insertion Loss.
Attenuation/Frequency Distortion.
Idle noise (C-message and 3 KHz weighting).
Noise-with-Tone.
Impulse noise.
Phase and Gain Hits.
Dropouts.
Phase Jitter (20-300 Hz).
Envelope Delay Distortion.
Non-Linear Distortion.
Low-Frequency Phase Jitter (4-20 Hz, i.e., Wobbulation) (Optional).
Noise-to-Ground (Optional).
Peak-to-Average Ratio (Optional).

Self-Check Capability: The instrument should have a comprehensive self-check capability.
Terminating Impedance: The instrument should have a selection of terminating impedance options, including 600 and 900 ohms, as well as a bridging position.

It’s important to note that the information provided is based on the SAES-T-521 standard, and specific instrument models or manufacturers may vary. It is advisable to refer to the latest version of the standard or consult with relevant experts for the most up-to-date and accurate information.

fAQs about SAES-T-521 PDF Download

Q1: What is SAES-T-521?

A: SAES-T-521 is a Saudi Aramco Engineering Standard that provides recommendations for test equipment, measurement methods, fault-finding techniques, and preventive maintenance practices for data communications channels and equipment.

Q2: Who does SAES-T-521 apply to?

A: SAES-T-521 applies to individuals involved in the provision and maintenance of data communications within Saudi Aramco.

Q3: What is the purpose of SAES-T-521?

A: The purpose of SAES-T-521 is to guide personnel in selecting appropriate test equipment, conducting measurements, diagnosing faults, and implementing preventive maintenance practices to ensure reliable and efficient data communication systems.

Q4: What does SAES-T-521 cover?

A: SAES-T-521 covers topics such as test equipment selection, measurement methods for assessing performance, fault-finding techniques for troubleshooting issues, and recommended practices for preventive maintenance of data communication channels.

Q5: Why is SAES-T-521 important?

A: SAES-T-521 is important because it helps ensure the optimal performance of data communication systems by providing guidelines for measurement, fault-finding, and preventive maintenance, thereby minimizing downtime and improving efficiency.

SAES-T-521 PDF – Circuit Measuring Techniques