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JJG 840-2015 English PDF

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Q: Should I purchase the latest version JJG 840-2015?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 840-2015 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$809.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 840-2015: Function Generators
Status: Valid

JJG 840: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 840-2015	809	Add to Cart	5 days	Function Generators	Valid
JJG 840-1993	999	Add to Cart	5 days	Verification Regulation of Function Generator	Obsolete

Similar standards

GB/T 3222.1 JJF 1234 JJF 1396 JJG 802 JJG 238 JJG 841

Basic data

Standard ID: JJG 840-2015 (JJG840-2015)
Description (Translated English): Function Generators
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A57
Word Count Estimation: 35,382
Date of Issue: 2015-12-07
Date of Implementation: 2016-06-07
Older Standard (superseded by this standard): JJG 840-1993
Regulation (derived from): ?AQSIQ 2015 Nian (No.148)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard is applicable to the first verification, subsequent verification, and in-service inspection of function generators with frequencies below 250 MHz.

JJG 840-2015: Function 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.
Function Generators National Metrological Verification Regulation of the People's Republic of China Function generator 2015-12-07 released 2016-06-07 implementation State Administration of Quality Supervision, Inspection and Quarantine issued Function generator verification procedure Replacing JJG 840-1993 Coordinate Unit. National Radio Measurement Technology Committee The main drafting unit. China Institute of Metrology Shanghai Institute of Metrology and Testing Technology Jiangsu Institute of Metrology Participated in the drafting unit. Henan Institute of Metrology This procedure entrusts the National Radio Measurement Technology Committee to explain The main drafters of this procedure. Yu Yuhua (China Institute of Metrology) Zhu Jianang (Shanghai Institute of Metrology and Testing Technology) Wu Jun (Jiangsu Institute of Metrology) Participate in the drafters. Miao Jingyuan (China Institute of Metrology) Huang Zhiming (China Institute of Metrology) Du Jianguo (Henan Institute of Metrology)

Introduction (II) 1 Scope (1) 2 Overview (1) 3 Measurement performance requirements (1) 3.1 Frequency (1) 3.2 magnitude (1) 3.3 Distortion (1) 3.4 Triangular wave/ramp linearity (1) 3.5 square wave/pulse characteristics (1) 4 General technical requirements (2) 5 Measuring instruments (2) 5.1 Test conditions (2) 5.2 Test items and verification methods (3) 5.3 Processing of Verification Results (13) 5.4 Verification cycle (13) Appendix A Function Generator Verification Result Original Record Format (14) Appendix B Verification Certificate Inside Page Format (20) Appendix C Results of Notification of Notification (27) Appendix D least squares method to calculate triangular wave linearity and measurement process (29)

Introduction

This procedure is a revised version of the JJG 840-1993 function signal generator verification procedure. The amendments are as follows. The original procedure name is "function signal generator", now changed to "function generator". The original program "output amplitude of the test", with the oscilloscope to measure the amplitude, the function generator output amplitude technical indicators More than 1% is no longer applicable, revised directly with a digital voltmeter to detect the effective amplitude of the waveform amplitude; by the waveform coefficient Calculate the peak and peak values of the measured waveform amplitude. The original program with a voltmeter and oscilloscope test "sine wave amplitude flatness", no longer meet the frequency up to several hundred trillion Hertz, frequency response indicators up to 1% of the function generator, revised directly with a power meter or measurement receiver test is The amplitude of the sine wave amplitude. Distortion parameters. to retain the original program "sine wave total distortion coefficient of the test", revised after the increase in harmonic distortion Number, and as a selected item. The original procedure "triangular wave linear test", the matching load connection complex, general formula, easy to operate, repair After the replacement with 50Ω matching load; the formula was refined, and in Appendix D gives the least squares fitting Formula and measurement program reference flow. Since most of the function generator technical specifications do not give the technical indicators of the modulation function and only given the modulation model Or the relevant function of the parameters, so the procedures for the modulation function only for the normal check. The currently produced function generator does not require the attenuator specification, and the revised procedure has canceled this parameter. The previous release of this order is. --- JJG 840-1993. Function generator verification procedure

1 Scope

This procedure applies to the first verification of the function generator at frequencies below 250 MHz, subsequent verification and use Check in.

2 Overview

Function generator is a direct digital synthesis (DDS) generated sine wave, square wave, triangular wave, pulse wave and tune (AM), FM (FM), phase modulation (PM), frequency shift keying (FSK), group pulse (BURST), sweep (SWEEP) and other time function waveform instruments, widely used in radio frequency measurement parameters.

3 Measurement performance requirements

3.1 Frequency Frequency range. 0.1Hz ~ 250MHz Frequency accuracy. 5 × 10-3 ~ 1 × 10-8 3.2 range DC voltage amplitude. ± 20V DC voltage amplitude error. ± 0.1% ~ ± 10% AC voltage amplitude. 5mV ~ 55V (peak and peak) (high impedance load 1kHz) 5mV ~ 10V (peak and peak) (50Ω load 1kHz) AC voltage amplitude error. ± 0.5% ~ ± 10% Sine wave amplitude flatness. 100mV ~ 10V (peak and peak) (1kHz ~ 250MHz); ± 0.1dB ~ ± 1dB 3.3 Distortion Total harmonic distortion. 0.02% to 1.0% (frequency range 20Hz ~ 20kHz, peak-to-peak voltage 1V) Harmonic distortion. -70dBc ~ -25dBc (frequency range 0.1Hz ~ 250MHz, peak-to-peak voltage 1V Time) 3.4 Triangular wave/oblique linearity Triangular wave/oblique linearity. 0.1% to 0.5% (1V peak to peak, 1kHz) 3.5 square wave/pulse characteristics Rise time. 1ns ~ 10μs (5V peak and peak) Overshoot. 1% to 20% Air ratio. 5% to 95% Air ratio accuracy. better than 2% ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 840-2015_English be delivered?

Answer: Upon your order, we will start to translate JJG 840-2015_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 JJG 840-2015_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 840-2015_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. 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.

Question 5: Should I purchase the latest version JJG 840-2015?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 840-2015 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.