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JJF 1677-2017: Calibration Specification for Frequency Distribution Amplifiers
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Calibration Specification for Frequency Distribution Amplifiers
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JJF 1677-2017
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Basic data | Standard ID | JJF 1677-2017 (JJF1677-2017) | | Description (Translated English) | Calibration Specification for Frequency Distribution Amplifiers | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A57 | | Word Count Estimation | 26,216 | | Date of Issue | 2017-11-20 | | Date of Implementation | 2018-02-20 | | Regulation (derived from) | AQSIQ Notice 2017 No. 103 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine | JJF 1677-2017: Calibration Specification for Frequency Distribution Amplifiers---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.
Calibration Specification for Frequency Distribution Amplifiers
People's Republic of China National Metrology Technical Specifications
Frequency Distribution Amplifier Calibration Specifications
Published on.2017-11-20
2018-02-20 Implementation
The State Administration of Quality Supervision, Inspection and Quarantine issued
Frequency Distribution Amplifier Calibration Specifications
Key units. National Time Frequency Measurement Technical Committee
Drafted by. China Academy of Metrology
Participated in the drafting. Shijiazhuang Digital Equipment Co., Ltd.
This specification entrusts the National Time Frequency Measurement Technical Committee to explain
The main drafters of this specification.
Xu Qinghua (China Institute of Metrology)
Zhang Aimin (China Institute of Metrology)
Participating drafters.
Feng Wei (Shijiazhuang Digital Equipment Co., Ltd.)
Zhang Yue (China Institute of Metrology)
table of Contents
Introduction (II)
1 Scope (1)
2 Terms and units of measurement (1)
3 Overview (1)
4 Metrological characteristics (1)
5 Calibration Conditions (2)
6 Calibration Items and Calibration Methods (3)
7 Expression of Calibration Results (7)
8 Re-school interval (8)
Appendix A (9)
Appendix B (13)
Appendix C (16)
Introduction
This specification is based on JJF 1071-2010 "Rules for the preparation of national metrological calibration specifications", JJF 1001-2011
Using Measurement Terms and Definitions" and JJF 1059.1-2012 Evaluation and Expression of Measurement Uncertainty.
This specification is the first release.
Frequency Distribution Amplifier Calibration Specifications
1 Scope
This specification applies to the calibration of frequency distribution amplifiers with a frequency range of (0.1 to 100) MHz.
2 Terms and units of measure
2.1 isolation isolation
Leakage of radio frequency signals loaded into the output port of the frequency-sharing amplifier to power of other output ports or input ports
The ratio of the input power to the loaded RF signal in dB.
2.2 Crosstalk crosstalk
For multi-input multi-output frequency distribution amplifiers, when there is a signal input at a certain set of distribution amplification inputs
In working condition, the output power of other distribution amplifiers with no input signal inactive is in operation
The ratio of the output power of the distribution amplifier of the state, in dB.
3 Overview
Frequency distribution amplifier, also known as radio frequency distribution amplifier, is a signal from one channel (or multiplex) input, from multiple output
And maintain the original signal characteristics of the instrument. The input multi-channel output frequency distribution amplifier principle is shown in Figure 1. enter
The signal is converted into multiple outputs by the power divider and low noise amplifier. Frequency distribution amplifiers are widely used in communications, when
Inter-frequency measurement and other fields.
Figure 1 Frequency distribution amplifier block diagram
4 Metrological characteristics
4.1 Input and output frequency. Continuous frequency distribution amplifier is generally (0.1~100)MHz; fixed frequency allocation
The amplifier is generally 5MHz, 10MHz, 100MHz and so on.
4.2 Gain (or output power). (-0.5~0.5)dB (For frequency distribution of the output power is fixed
The output power is generally 13dBm).
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