JJG 349-2014 English PDF

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JJG 349-2014: Verification Regulation of the Universal Counters
Status: Valid

JJG 349: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 349-2014	489	Add to Cart	4 days	Verification Regulation of the Universal Counters	Valid
JJG 349-2001	639	Add to Cart	5 days	Verification Regulation of Universal Counters	Obsolete
JJG 349-1984	639	Add to Cart	5 days	(Universal electronic counter test procedures)	Obsolete

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Basic data

Standard ID: JJG 349-2014 (JJG349-2014)
Description (Translated English): Verification Regulation of the Universal Counters
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A57
Classification of International Standard: 17.080
Word Count Estimation: 21,271
Date of Issue: 8/1/2014
Date of Implementation: 2/1/2015
Older Standard (superseded by this standard): JJG 349-2001
Quoted Standard: JJG 180; JJG 181; JJG 292; JJG 841
Regulation (derived from): AQSIQ Notice 2014 No. 89
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine
Summary: This Standard applies to the measurement frequency range of 18 GHz or less universal counter initial verification, use and subsequent verification check.

JJG 349-2014: Verification Regulation of the Universal Counters

---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.
Verification Regulation of the Universal Counters State verification procedures People's Republic of China Universal Counter Issued on. 2014-08-01 2015-02-01 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Universal Counter test procedures Replacing JJG 349-2001 Focal point. the National Commission on Time and Frequency Measurement Technology Main drafting unit. Shanghai Institute of Measurement and Testing China Testing Technology Research Institute Participated in the drafting. Instrument Co., Ltd. Nanjing Telecommunications Union Jiangsu Province Institute of Metrology China Electronics Technology Group Corporation 13th Research Institute measurement center The national time and frequency measurement procedures commissioned technical committee responsible for the interpretation The main drafters of this procedure. Dong Lin (Shanghai Institute of Measurement and Testing) Guo Chunmei (China Testing Technology Research Institute) Drafters participate. Chen Yajun (Nanjing Telecommunications Union Instrument Co., Ltd.) Liu Qihua (Shanghai Institute of Measurement and Testing) Hu Lizhi (Shanghai Institute of Measurement and Testing) Jinrong (Jiangsu Province Institute of Metrology) Liu Hongchun (China Electronics Technology Group Corporation 13th Research Institute of Metrology Center)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2. References (1) 3 Terms (1) 4 Overview (1) 5 metering performance requirements (1) 5.1 Input characteristics (1) 5.2 Frequency Measurement maximum permissible error (2) 5.3 The maximum permissible error measurement period (2) 5.4 Time interval measuring the maximum permissible error (2) Built-in time base oscillator 5.5 (2) 6 General Requirements (2) 7 control of measuring instruments (3) 7.1 test conditions (3) 7.2 test items and test methods (3) 7.3 Verification Results Processing (7) 7.4 test cycle (7) Appendix A common counter calibration certificate/test results in the notice page format (8) Appendix B universal counter calibration certificate test results page format (9) Appendix C Universal counter notice test results test results page format (11) Appendix D general-purpose counter the original record test data page format (13)

Introduction

This procedure is carried out revision of JJG 349-2001. Compared with JJG 349-2001, in addition to editorial changes outside The main technical changes are as follows. --- Increase the frequency measurement limit, the lower limit of the measurement period and the time interval measurement limit; --- New introduction, the term content, effective resolution proposed concept; --- Modify, supplement the content requirements for performance measurement; --- Refine and clarify the test conditions and test methods; --- Modify, add cycle measurement error test methods; --- Supplementary time interval measurement error in the single-channel pulse width test method; --- New calibration certificate/test results notice page format, page format calibration certificate test results, test knot If the notice of test results page format, the original record test data page format. The regulations previously issued as follows. --- JJG 349-2001. Universal Counter test procedures

1 Scope

The order applies to the measurement frequency range of 18GHz or less universal counter initial verification, verification and follow-up Use checks. 2. References JJG 180 electronic measuring instruments within the quartz oscillator JJG 181 quartz crystal frequency standard JJG 292 rubidium atomic frequency standard JJG 841 microwave frequency counter For dated references, only the dated edition applies to this procedure; undated reference documents Member, the latest edition (including any amendments) applies to this procedure.

3 Terms

Effective resolution effectiveresolution Instrument displays measurement results in a stable, positive digit represents the lowest value.

4 Overview

Universal Counter basic principle is suitable logic circuit (gate time) within a predetermined standard time The cumulative number of oscillations measured input signal, or in the time interval measured cumulative standard time (time base) signal a Number, frequency, and period measurement time interval; basic circuit by the input channel when generating transform unit group, Main door, a control unit, a display unit and other components and counting; with a variety of measurement functions, including the frequency, period, and Time interval measurement, usually including frequency than at any time interval and the cumulative number of pulses counting measure Features.

5 metering performance requirements

5.1 Input characteristics Input characteristics are shown in Table 1. Table 1 Input characteristics Measurement of performance Measurement function Frequency periodic time interval Measuring range (0 ~ 1) GHz (1 ~ 18) GHz 1ns ~ 10ns 10ns ~ 100s 2ns ~ 105s Input Sensitivity (RMS) (10 ~ 300) mV (-33 ~ -20) dBm (-33 ~ -20) dBm (10 ~ 300) mV --- ......

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