JJG 545-2015 English PDFUS$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. JJG 545-2015: Verification Regulation of Frequency Comparators Status: Valid JJG 545: Historical versions
Basic dataStandard ID: JJG 545-2015 (JJG545-2015)Description (Translated English): Verification Regulation of Frequency Comparators Sector / Industry: Metrology & Measurement Industry Standard Classification of Chinese Standard: A57 Classification of International Standard: 17.080 Word Count Estimation: 12,163 Date of Issue: 2015-08-24 Date of Implementation: 2016-02-24 Older Standard (superseded by this standard): JJG 545-2006 Regulation (derived from): AQSIQ Announcement 2015 No.106 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine Summary: This standard applies to the difference between the frequency doubling technology-based, dual mixer time difference and digital dual mixing technique the difference frequency standard than the initial verification, use and subsequent verification check. JJG 545-2015: Verification Regulation of Frequency Comparators---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.(Frequency standard test procedures than for control) State verification procedures People's Republic of China Frequency standard comparison device Issued on. 2015-08-24 2016-02-24 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Frequency standard comparison unit test procedures Replacing JJG 545-2006 Focal point. the National Commission on Time and Frequency Measurement Technology The main drafting units. China Institute of Metrology Participated in the drafting. the number of British Instrument Co., Ltd., Shijiazhuang The national time and frequency measurement procedures commissioned technical committee responsible for the interpretation The main drafters of this procedure. Zhao Kejia (China Institute of Metrology) Zhang Aimin (China Institute of Metrology) Drafters participate. Feng Wei (number Shijiazhuang British Instrument Co., Ltd.) Zhang Yue (China Institute of Metrology) table of ContentsIntroduction (Ⅱ) 1 Scope (1) 2 terminology and units of measurement (1) 2.1 The term (1) 2.2 units of measurement (1) 3 Overview (1) 4 metering performance requirements (1) 4.1 reference frequency (1) 4.2 measured frequency (1) 4.3 ratio of Uncertainty (1) 4.4 Input sensitivity (1) 5 General Requirements (2) 6 Control of measuring instruments (2) 6.1 Verification condition (2) 6.2 test items and test methods (2) 6.3 Verification Results Processing (5) 6.4 test cycle (5) Appendix A test certificate-page format (6) Appendix B test results in the notice page format (7)IntroductionThe preparation procedure is JJF1001-2011 "common measurement terms and definitions", JJF1002-2010 "country Verification procedures write home rule "as the basis for JJG 545-2006" frequency standard comparison device test procedures "were Revised. Compared with JJG 545-2006, in addition to editorial changes, the present regulations the main technical changes are as follows. --- Terminology and units of measurement section and delete the measurement bandwidth relative frequency difference between the maximum; --- Performance Measurement Requirements section delete maximum relative frequency difference measurement bandwidth, doubling the frequency difference frequency, output amplitude Degrees, doubling output to enhance the ratio of uncertainty indicators; --- Control section measuring instruments verification equipment section, remove the universal counter, frequency mV table showing Filter, increasing the power meter, splitters, attenuators; --- Measuring instruments control verification section project section, delete the test project measurement bandwidth, the maximum allowable phase Frequency offset, frequency difference frequency doubling the output amplitude; re-establishment of normal appearance and work checking and input sensitivity Verification method. Previous version JJG 545 release conditions. --- JJG 545-2006; --- JJG 545-1988. Frequency standard comparison unit test procedures1 ScopeThe order applies to the frequency difference frequency standard based on doubling technology, dual mixer time difference and digital dual mixer time difference technique Than the initial verification, use and subsequent verification check.2 terminology and units of measurement2.1 Terminology 2.1.1 than uncertainty comparisonuncertainty Frequency standard than the uncertainty of measurement in the introduction, with the alendronate standard deviation, and sample duration. 2.1.2 Input sensitivity inputsensitivity Frequency standard minimum voltage of the input signal than is normally required for the work, an effective value. 2.2 units of measurement Than the uncertainty of a dimensionless quantity; Input sensitivity measurement unit V or dBm.3 OverviewFrequency standard than the main principle of the device is achieved by doubling the frequency difference technology, dual mixer time difference and digital dual mixer The difference frequency measurement technology to improve resolution. Frequency difference multiplier technology and dual mixer time difference is measured by the counter two The average frequency standard frequency or phase difference, time-domain specifications and then calculated by the post-processing program; digital dual mixer time difference TECHNOLOGY Surgery is the two frequency standard for digital signal sampled by digital down conversion, digital phase digital signal processing to give equal phase Difference data, and further calculate the time domain or frequency domain specification. Frequency standard than is normally used to measure the frequency standard time domain or frequency domain characteristics.4 metering performance requirements4.1 Reference Frequency The reference frequency is 5MHz, 10MHz. 4.2 measured frequency The measured frequency is 5MHz, 10MHz. 4.3 ratio of uncertainty Comparison uncertainty of ≤1 × 10-12/τ. τ is the sampling time is 1ms ~ 100s. 4.4 Input Sensitivity Input sensitivity ≤0.5V. Note. When the test, each of the above specifications to the product specification shall prevail. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of JJG 545-2015_English be delivered?Answer: Upon your order, we will start to translate JJG 545-2015_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of JJG 545-2015_English with my colleagues?Answer: Yes. The purchased PDF of JJG 545-2015_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. 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Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
