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JJF 1724-2018 English PDF

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US$599.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1724-2018: Calibration Specification for Timecode Generators
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1724-2018	599	Add to Cart	5 days	Calibration Specification for Timecode Generators	Valid

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Basic data

Standard ID: JJF 1724-2018 (JJF1724-2018)
Description (Translated English): Calibration Specification for Timecode Generators
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A57
Word Count Estimation: 26,263
Date of Issue: 2018-12-25
Date of Implementation: 2019-03-25
Regulation (derived from): State Administration of Markets, Announcement No. 34 of 2018
Issuing agency(ies): State Administration for Market Regulation

JJF 1724-2018: Calibration Specification for Timecode Generators

---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.
(Time code generator calibration specification) National Metrology Technical Specification Time code generator calibration specification Published on.2018-12-25 2019-03-25 implementation State Market Supervisory Administration released Time code generator calibration specification Focal Point. National Time Frequency Measurement Technical Committee Main drafting unit. Beijing Radio Measurement and Testing Institute Participated in drafting unit. Institute of Telecommunications, Ministry of Industry and Information Technology China Institute of Metrology Shanghai Institute of Metrology and Testing Technology China Electronics Technology Group Ten This specification entrusts the National Time and Frequency Measurement Technical Committee to explain The main drafters of this specification. Zhang Ming (Beijing Radio Measurement and Testing Institute) Zhang Ran (Beijing Radio Measurement and Testing Institute) Participate in the drafters. Song Yue (Beijing Radio Measurement and Testing Institute) Zhou Bo (Telecommunication Research Institute, Ministry of Industry and Information Technology) Zhang Aimin (China Institute of Metrology) Dong Lian (Shanghai Institute of Metrology and Testing Technology) Yang Lin (10 Electronics Technology Group of China)

Introduction (II) 1 Scope (1) 2 References (1) 3 Terms and units of measurement (1) 4 Overview (1) 5 Measurement characteristics (2) 5.1 Output 1PPS vs. standard time deviation (2) 5.2 Output B code relative to standard time deviation (2) 5.3 Time keeping deviation (2) 5.4 Internal time base performance (2) 6 Calibration conditions (2) 6.1 Environmental conditions (2) 6.2 Measurement standards and other equipment (2) 7 Calibration items and calibration methods (3) 7.1 Calibration Project (3) 7.2 Calibration method (3) 8 calibration result expression (6) 9 re-study interval (7) Appendix A Example of Measurement Uncertainty Evaluation (8) Appendix B Original Record Format (14) Appendix C Calibration Certificate (inside page) format (17)

Introduction

This specification is based on JJF 1071-2010 “Rules for the Preparation of National Metrology Calibration Specifications”. This specification is the first release. Time code generator calibration specification

1 Scope

This specification applies to the calibration of time code generators that generate 1PPS, B (DC) codes, and B (AC) code time signals.

2 reference files

This specification refers to the following documents. JJG180 electronic measuring instrument quartz crystal oscillator JJG292 铷 atomic frequency standard JJG2007 time frequency measuring instrument verification system table JJF 1180 Time Frequency Measurement Terms and Definitions GJB2991A B time code interface terminal general specification For dated references, only dated versions apply to this specification; undated quotations The latest version (including all amendments) applies to this specification.

3 terms and units of measure

3.1 time keeping deviation time-keeping error The time code generator locks the external standard time signal in normal tracking and reaches the servo time specified in the product specification. After that, the external standard time signal is disconnected, so that the time code generator works in the hold mode, in its specification specification The maximum deviation of the 1PPS signal output from the standard hold time within the fixed hold time. The unit is seconds (s).

4 Overview

The time code generator is composed of a standard time signal receiving unit, a time keeping unit, and a time frequency signal generating unit group to make. Time code generator obtains standard time by receiving BDS, GPS, GLONASS and other GNSS signals for demodulation and decoding. Information, synchronize the local clock, and use the internal time base for time keeping, and output 1PPS, B (AC) Time signal such as code, B (DC) code. Figure 1 is a block diagram of the time code generator. Figure 1 block diagram of the time code generator ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1724-2018_English be delivered?

Answer: Upon your order, we will start to translate JJF 1724-2018_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1724-2018_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1724-2018_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.