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JJF 1111-2003

JJF 1111-2003_English: PDF (JJF1111-2003)
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JJF 1111-2003English659 Add to Cart 5 days Calibration Specification for Modulation Meters JJF 1111-2003 Valid JJF 1111-2003

BASIC DATA
Standard ID JJF 1111-2003 (JJF1111-2003)
Description (Translated English) Calibration Specification for Modulation Meters
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A56
Word Count Estimation 26,293
Date of Issue 2003-11-24
Date of Implementation 2004-02-24
Older Standard (superseded by this standard) JJG 437-1989
Drafting Organization Ministry of Information Industry 601 metering station
Administrative Organization National Radio Measurement Technical Committee
Summary This standard applies to modulation measurement instrument calibration.

JJF 1111-2003
Calibration Specification for Modulation Meters
National Metrology Technical Specification of the People's Republic
Modulation gauge calibration specification
Released on.2003-11-24
2004-02-24 implementation
The General Administration of Quality Supervision, Inspection and Quarantine issued
Modulation gauge calibration specification
Replace JJG437-1989
This specification was approved by the General Administration of Quality Supervision, Inspection and Quarantine on November 24,.2003, and
It will take effect on February 24,.2004.
Focal Point. National Radio Metering Technical Committee
Drafting unit. Ministry of Information Industry Electronics 601 Metering Station
This Code entrusts the National Radio Measurement Technical Committee to explain
Drafters of this specification.
Liang Qiong Chong (Electronic 601 Metrology Station of the Ministry of Information Industry)
table of Contents
1 range (1)
2 Citations (1)
3 Overview (1)
4 Measurement characteristics (1)
4.1 FM frequency offset measurement (1)
4.2 Adjustment amplitude measurement (2)
4.3 Phase shift phase shift measurement (2)
4.4 Residual frequency modulation (2)
4.5 Remaining amplitude modulation (2)
4.6 Remaining phase modulation (2)
4.7 AM suppression during FM measurement (2)
4.8 Frequency modulation suppression during amplitude modulation measurement (2)
4.9 amplitude modulation suppression during phase modulation measurement (2)
4.10 Demodulation output distortion during FM measurement (2)
4.11 Demodulation output distortion during amplitude modulation measurement (3)
4.12 Demodulation output distortion during phase modulation measurement (3)
5 Calibration conditions (3)
5.1 Environmental conditions (3)
5.2 Standards and other equipment for calibration (3)
6 Calibration items and calibration methods (4)
6.1 Appearance and normality check (4)
6.2 Calibration of FM frequency offset measurement (4)
6.3 Calibration of amplitude measurement (5)
6.4 Calibration of phase shift phase shift measurement (5)
6.5 Measurement of residual frequency modulation (6)
6.6 Measurement of residual amplitude modulation (7)
6.7 Measurement of residual phase modulation (7)
6.8 Measurement of amplitude modulation suppression during frequency modulation measurement (7)
6.9 Measurement of frequency modulation suppression during amplitude modulation measurement (8)
6.10 Calibration of amplitude modulation suppression during phase modulation measurement (8)
6.11 Measurement of Demodulation Output Distortion during FM Measurement (9)
6.12 Measurement of Demodulation Output Distortion during AM Measurement (9)
6.13 Measurement of Demodulation Output Distortion during Phase Modulation Measurement (9)
7 Expression of calibration results (9)
8 re-study interval (10)
Appendix A Calibration Record Format (11)
Appendix B Example of Uncertainty Analysis of Measurement Results of Major Projects (18)
Modulation gauge calibration specification
1 Scope
This calibration specification applies to the calibration of a modulation meter.
2 Citations
JJF 1059-1999 "Measurement and Expression of Measurement Uncertainty".
3 Overview
The modulation meter is used to measure the modulation parameters of the RF modulated signal. Modulation parameters include the most FM signal
Large frequency offset (referred to as frequency offset), modulation depth of amplitude modulation signal (referred to as amplitude modulation) and maximum phase of phase modulation signal
Offset (referred to as phase shift) and modulation distortion. The common modulation measuring instrument consists of five parts. high frequency amplification and decay
Subtraction, local oscillator and mixing, IF amplification, detection (frequency discrimination, envelope detection, etc.) and display, as shown in Figure 1. Due to inspection
The wave method is different, and the measurement results are different. There are three types of peaks, RMS and average. Sinusoidal modulation
When the peak value is twice the effective value, the effective value is the average value of π24.
Tim