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GB/T 6934-2017Methods of measurement of electrical performance for short wave single-sideband receivers (English PDF)

短波单边带接收机电性能测量方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 12, 2017

Implementation date

December 1, 2017

Scope

GB/T 6934-2017 is the English-translated version of 短波单边带接收机电性能测量方法.

GB/T 6934-2017 is the Chinese standard "Methods of measurement of electrical performance for short wave single-sideband receivers".

Its scope clause reads: This standard specifies the short term single sideband receiver (hereinafter referred to as receiver) electrical performance measurement terms and definitions, the standard measurement conditions and measurement Quantity method.

This standard applies to a receiver without a complete antenna, the audio bandwidth of not more than 10kHz full carrier (H3E), reduce the carrier (R3E) and suppression carrier (J3E), including the receiver of the independent sideband (B8E); also suitable for reception of dual-sideband (A3E) (A1A, A1B) receiver.

Note 1. This standard only provides the measurement method of electrical performance and its relevant conditions, measurement items and performance indicators specified by the product specifications.

Note 2. For special receivers, the definition and measurement methods of electrical performance items not specified in this standard shall be negotiated by both parties. Its clauses include normative reference documents; terms and definitions.

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Document preview — GB/T 6934-2017

National Standard of the People's Republic of China

ICS: 33.060.20
Classification: M 36
Replacing: GB/T 6934-1995

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 normative reference document
3 Terms and definitions
4 standard measurement conditions
4.2 Standard power supply conditions
5 supplementary measurement conditions
5.1 Input signal source
5.2 Connection of measuring equipment
5.3 Characteristics of measuring equipment
5.4 Measuring workplace conditions
6 electrical performance test instructions and measurement methods
6.1 General
6.2 Frequency error
6.3 Frequency stability
6.4 Reference sensitivity
6.5 Frequency
6.6 Noise figure
6.7 large signal to noise ratio
6.8 Audio response
6.9 sideband linear channeling
6.10 Group delay (envelope delay distortion)
6.11 Response delay
6.12 IF Selectivity
6.13 Reverse radiation level
6.14 Local oscillator phase noise
6.15 Total distortion factor
6.16 Enter the standing wave ratio
6.17 Relative audio intermodulation (inband intermodulation)
6.18 sideband non-linear channeling
6.19 out-of-band intermodulation
6.20 proximity signal selectivity
6.21 Blocking
6.22 reciprocal mixing
6.23 reciprocating mixing ratio
6.24 IF suppression ratio
6.25 Lens suppression ratio
6.26 Stray frequency rejection ratio
6.27 Combination sound
6.28 Automatic Gain Control Characteristics
6.29 Automatic Gain Response Time
6.30 RF gain control
6.31 Volume control or line level adjustment
6.32 phase jitter
Appendix A (Normative Appendix) Hybrid Network
Appendix B (normative) Characteristics of measuring instruments and sources
Appendix C (informative) Measurement of maximum frequency error
Appendix D (normative appendix) Measurement of intermodulation input intercept point values

1 Scope

This standard specifies the short term single sideband receiver (hereinafter referred to as receiver) electrical performance measurement terms and definitions, the standard measurement conditions and measurement

Quantity method.

Note 1. This standard only provides the measurement method of electrical performance and its relevant conditions, measurement items and performance indicators specified by the product specifications.

Note 2. For special receivers, the definition and measurement methods of electrical performance items not specified in this standard shall be negotiated by both parties.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article

Pieces. For undated references, the latest edition (including all modifications) applies to this document.

GB/T 2421.1 Environmental and Environmental Testing of Electrical and Electronic Products

3 terms and definitions

The following terms and definitions apply to this document.

3.1 Audio test load audio-frequencytestload

Instead of short-wave single-sideband receivers working properly when connected to the load impedance of the impedance network to simulate the normal load and the normal use of the cable impedance.

Note. The impedance network is specified by the manufacturer and is usually composed of a single pure resistor.

3.2 Reference output level

Short-wave single-sideband receiver in the specified working conditions, the connection of the specified audio test load when the useful output power, it is used to do test

The amount of the reference level.

Note. When measuring, it is generally specified that the audio test load is 600ohm and the reference output level is 0dBm. There are other specific requirements when the reference output level is produced by the production

Product standards to make provision.

3.3 Shinano SINAD

The audio test load, the standard test modulation produces the useful audio signal, the noise and distortion of the output power sum, and the standard test modulation

The resulting noise, distortion of the power and ratio.

SINAD =

SND ND (1)

Where.

S --- standard test modulation generated by the useful audio signal;

N --- standard test modulation noise;

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.

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Editions of GB/T 6934

Edition	Title	Revision	Status
GB/T 6934-2017	Methods of measurement of electrical performance for short wave single-sideband receivers	current edition	Current
GB/T 6934-1995	Methods of measurement of electrical performance for short wave single-sideband receivers	previous edition	Superseded

This page sells the current edition, GB/T 6934-2017. Earlier editions are listed for reference only.

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