JJF 1740-2019 English PDF

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JJF 1740-2019: Calibration Specification for Cable and Antenna Analyzers
Status: Valid

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JJF 1740-2019	459	Add to Cart	4 days	Calibration Specification for Cable and Antenna Analyzers	Valid

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Basic data

Standard ID: JJF 1740-2019 (JJF1740-2019)
Description (Translated English): Calibration Specification for Cable and Antenna Analyzers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A56
Classification of International Standard: 17.220
Word Count Estimation: 20,288
Date of Issue: 2019
Date of Implementation: 2019-12-27
Issuing agency(ies): State Administration for Market Regulation

JJF 1740-2019: Calibration Specification for Cable and Antenna Analyzers

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Calibration Specification for Cable and Antenna Analyzers National Measurement Technical Specification of the People's Republic of China Calibration specification for antenna feeder tester 2019-09-27 release 2019-12-27 Implementation Issued by the State Administration of Market Supervision and Administration Calibration specification for antenna feeder tester Focal point. National Radio Measurement Technical Committee Main drafting unit. China Information and Communication Research Institute Participated in the drafting unit. Beijing Xinchen Technology Co., Ltd. China Testing Technology Research Institute This specification is entrusted to the National Radio Measurement Technical Committee for interpretation The main drafters of this specification. Sun Jinglu (China Information and Communication Research Institute) Zhang Peiyan (China Information and Communication Research Institute) Participating drafters. Cheng Kai (China Information and Communication Research Institute) Huang Hui (Beijing Xinchen Technology Co., Ltd.) Meng Linggang (China Institute of Testing Technology) Zhifeng Zhang (China Institute of Testing Technology)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2 Terminology (1) 3 Overview (1) 4 Measurement characteristics (1) 4.1 Output signal frequency (1) 4.2 Output power (1) 4.3 Voltage standing wave ratio (1) 4.4 Attenuation (1) 4.5 Fault location distance (1) 4.6 RF power (1) 5 Calibration conditions (1) 5.1 Environmental conditions (1) 5.2 Calibration equipment (2) 6 Calibration items and calibration methods (2) 6.1 Appearance and work normality inspection (3) 6.2 Output signal frequency (3) 6.3 Output power (3) 6.4 Voltage standing wave ratio (3) 6.5 Attenuation (4) 6.6 Fault location distance (4) 6.7 RF power (4) 7 Expression of calibration results (5) 8 Recalibration interval (5) Appendix A Original Record Format (6) Appendix B. Internal page format of the calibration certificate (8) Appendix C Examples of Uncertainty Evaluation of Calibration Results of Main Items (10)

Introduction

This specification is based on JJF 1071-2010 "Rules for Compiling National Measurement and Calibration Specifications" and JJF 1059.1-2012 Preparation of "Measurement Uncertainty Evaluation and Representation". This specification specifies the frequency accuracy, output power, voltage standing wave ratio, and attenuation of the output signal of the antenna feeder tester The calibration method of the quantity, fault location distance, RF power, and the measurement uncertainty of the calibration items are given in the appendix Evaluation example. This specification is the first release. Calibration specification for antenna feeder tester

1 Scope

This specification applies to the calibration of antenna feeder testers.

2 Terminology

Distance to fault The antenna feeder tester determines the fault location according to the reflection coefficient or the maximum value of the voltage standing wave ratio. The distance of the location is the fault location distance.

3 Overview

The antenna feeder tester can quickly evaluate the condition of the transmission line and antenna system, and measure the reflection coefficient or voltage standing wave Ratio, cable loss and fault location distance. Antenna feeder tester is a commonly used measuring instrument in communication, widely used in Wireless system installation, configuration, maintenance and failure analysis. Antenna feeder tester usually consists of signal source unit, signal separation unit, receiver unit, digital control and display unit Composition. The port impedance is generally 50Ω.

4 Metering characteristics

4.1 Output signal frequency Range. 2MHz ~ 18GHz, maximum allowable error. ± (1 × 10-6 ~ 7.5 × 10-5). 4.2 Output power Range. -30dBm ~ 20dBm, the maximum allowable error. ± 2dB. 4.3 Voltage standing wave ratio Range. VSWR > 1, maximum allowable error. ± 20%. 4.4 Attenuation Range. 0dB ~ 30dB, maximum allowable error. ± 1.5dB. 4.5 Fault location distance Range. 0m ~ 1500m, maximum allowable error. ± (3% × physical length 0.1m). 4.6 RF power Range. -50dBm ~ 20dBm, maximum allowable error. ± 2dB. Note. The above technical indicators are not used to determine eligibility, only for reference.

5 Calibration conditions

5.1 Environmental conditions a) Ambient temperature. (23 ± 5) ℃; b) Relative humidity. ≤80%; ......

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