JJF 2090-2023 English PDF

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JJF 2090-2023: Calibration Specification for Quartz Crystal Frequency Standards
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 2090-2023	689	Add to Cart	6 days	Calibration Specification for Quartz Crystal Frequency Standards	Valid

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Basic data

Standard ID: JJF 2090-2023 (JJF2090-2023)
Description (Translated English): Calibration Specification for Quartz Crystal Frequency Standards
Sector / Industry: Metrology & Measurement Industry Standard
Word Count Estimation: 34,318
Date of Issue: 2023-10-12
Date of Implementation: 2024-04-12
Issuing agency(ies): State Administration for Market Regulation

JJF 2090-2023: Calibration Specification for Quartz Crystal Frequency Standards

---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.
National Metrology Technical Specifications of the People's Republic of China Quartz crystal frequency standard calibration specification Released on 2023-10-12 Implemented on 2024-04-12 Released by the State Administration for Market Regulation Quartz crystal frequency standard calibration specification FrequencyStandards Replace JJG181-2005 Responsible unit: National Technical Committee on Time and Frequency Measurement Main drafting unit: China Institute of Metrology Participating units in the drafting: Beijing Radio Measurement and Testing Institute The National Time and Frequency Measurement Technical Committee is entrusted with the interpretation of this specification: The main drafters of this specification: Liu Nianfeng (Chinese Institute of Metrology) Wang Yuzhuo (Chinese Institute of Metrology) Zhang Aimin (China Institute of Metrology) Participating drafters: Han Hong (Beijing Radio Measurement and Testing Institute)

Table of contents

Introduction(Ⅱ) 1 Scope(1) 2 Cited documents(1) 3 terms(1) 4 Overview(1) 5 Measuring characteristics(2) 5:1 Frequency signal output(2) 5:2 second pulse (1PPS) output(2) 5:3 Harmonic and non-harmonic distortion(2) 5:4 Frequency stability(2) 5:5 Phase noise(2) 5:6 Relative frequency deviation(3) 5:7 daily aging rate(3) 5:8 Frequency reproducibility(3) 5:9 GNSS tame quartz frequency standard relative frequency deviation (3) 5:10 GNSS tame quartz frequency standard second pulse timing deviation (3) 5:11 GNSS tame quartz frequency standard second pulse timing stability (3) 6 Calibration conditions(3) 6:1 Environmental conditions(3) 6:2 Measurement standards and other equipment(3) 7 Calibration items and calibration methods (4) 7:1 Calibration items (4) 7:2 Calibration method(5) 8 Calibration result expression(10) 9 Recalibration time interval(10) Appendix A Original record format (11) Appendix B Calibration Certificate (Inside Pages) Format (14) Appendix C GNSS Tamed Quartz Frequency Standard Calibration Certificate (Inside Page) Format (16) Appendix D Example of uncertainty assessment of major calibration items (18)

Introduction

JJF 1001-2011 "General Measurement Terms and Definitions", JJF 1071-2010 "Compilation of National Measurement Calibration Specifications" Rules" and JJF 1059:1-2012 "Evaluation and Expression of Measurement Uncertainty" together form the basis for formulating this calibration specification: Basic series of specifications: This specification is a revision of JJG181-2005 "Quartz Crystal Frequency Standard": The main revisions are as follows: ---The original name of the regulation was "Quartz Crystal Frequency Standard", which is now revised to "Quartz Crystal Frequency Standard Calibration Specification"; ---According to JJG2007-2015 "Time and Frequency Measuring Instruments", change "frequency accuracy" to "relative frequency" rate deviation”; ---Increase harmonic and non-harmonic distortion, daily aging rate, repeatability, second pulse amplitude, second pulse width, second pulse Calibration content of impulse jitter, second pulse timing deviation, and second pulse timing stability; ---Delete Appendix A (Relative average frequency deviation measurement method) in the original regulations; ---Delete Appendix B (Phase Noise Measurement Method) in the original regulations; The previous releases of this specification are as follows: ---JJG181-2005; ---JJG181-1989: Quartz crystal frequency standard calibration specification

1 Scope

This specification applies to quartz crystal frequency standards, including GNSS (Global Navigation Satellite System) tamed quartz crystals: Calibration of body frequency standards:

2 cited documents

This specification references the following documents: JJG2007 Time and frequency measuring instruments JJF 1001 General measurement terms and definitions JJF 1180 Time frequency measurement terms and definitions JJF 1403 Global Navigation Satellite System (GNSS) receiver (time measurement type) calibration specifications For dated references, only the dated version applies to this specification; for undated references, only the dated edition applies: The latest version (including all modification orders) shall apply to this specification:

3 terms

3:1 Timing offset timingoffset The quartz crystal frequency standard output 1PPS signal is the deviation from the standard 1PPS signal: 3:2 Timingstability The quartz crystal frequency standard output 1PPS signal is consistent with itself:

4 Overview

Quartz crystal frequency standard (hereinafter referred to as quartz frequency standard) has excellent short-term frequency stability and phase noise: Mainly composed of quartz resonator, oscillation circuit, isolation amplifier, automatic gain control circuit, constant temperature bath, precision temperature control It is composed of a control circuit and a DC regulated power supply: The working principle is shown in Figure 1: Figure 1 Working principle of quartz crystal frequency standard The output frequency of the GNSS-tamed quartz frequency standard is continuously adjusted by the GNSS signal, with smaller frequency deviation, which can Reach the level of atomic frequency standard: Quartz frequency standards are widely used in industrial production, national defense, scientific research and measurement and other departments: ......

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