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GB/T 32401-2015 English PDF (GBT32401-2015)

GB/T 32401-2015 English PDF (GBT32401-2015)

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GB/T 32401-2015: Technical requirements and measurement methods for VHF/UHF frequency band radio monitoring receiver

This standard specifies the general requirements for VHF/UHF frequency band radio monitoring receiver, as well as the main technical parameters, indicator requirements and test methods for electrical performance, electromagnetic compatibility, electrical safety, and environmental adaptability. This standard applies to VHF/UHF frequency band radio monitoring receiver.
GB/T 32401-2015
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 33.060
M 36
Technical requirements and measurement methods for
VHF/UHF frequency band radio monitoring receiver
ISSUED ON. DECEMBER 31, 2015
IMPLEMENTED ON. JULY 01, 2016
Issued by. General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword . 5
1 Scope .. 6
2 Normative references . 6
3 Terms and definitions, abbreviations, and symbols . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 8
3.3 Symbols . 9
4 Requirements . 9
4.1 General requirements . 10
4.1.1 Operating frequency . 10
4.1.2 Working mode . 10
4.1.3 Monitoring mode . 10
4.1.4 Demodulation mode requirements . 10
4.1.5 Operating voltage and power supply mode . 10
4.1.6 Device auxiliary interface . 10
4.2 Electrical performance requirements . 11
4.2.1 Electrical performance rating requirements . 11
4.2.2 Electrical performance rating assessment method .. 12
4.3 Electromagnetic compatibility requirements .. 12
4.3.1 Power terminal disturbance voltage .. 12
4.3.2 Radiation disturbance emission . 12
4.4 Electrical safety requirements . 13
4.5 Environmental adaptability requirements . 13
4.5.1 Low temperature . 13
4.5.2 High temperature .. 13
4.5.3 Temperature changes . 13
4.5.4 Impact .. 13
4.5.5 Vibration . 13
4.5.6 Damp heat . 13
4.5.7 Water dripping . 13
5 Electrical performance parameters test conditions and test methods . 13 5.1 Electrical performance parameters test conditions . 14
5.1.1 Standard test conditions .. 14
5.1.2 Limit test conditions . 14
5.1.3 Requirements for measuring device . 14
5.1.4 Requirements of the sample under test .. 15
5.1.5 Electrical performance test frequency .. 15
5.1.6 Test signal . 15
5.2 Electrical performance parameter test methods . 16
5.2.1 Basic test block diagram .. 16
5.2.2 Demodulation sensitivity .. 17
5.2.3 Monitoring sensitivity . 18
5.2.4 Frequency tuning resolution . 20
5.2.5 Frequency accuracy . 21
5.2.6 Intermediate frequency selectivity . 22
5.2.7 3rd order intercept point . 23
5.2.8 2nd order intercept point .. 24
5.2.9 Intermediate frequency interference suppression ratio .. 25
5.2.10 Mirror image frequency interference suppression ratio . 26
5.2.11 Receiver spurious emissions . 27
5.2.12 Scanning speed .. 29
5.2.13 Level measurement error .. 30
5.2.14 Audio distortion factor . 31
5.2.15 Voltage standing wave ratio . 31
5.2.16 Maximum input signal power at antenna port . 32
6 Electromagnetic compatibility test methods . 33
6.1 Power terminal disturbance voltage . 33
6.2 Radiation disturbance emission . 33
7 Electrical safety test methods . 33
8 Environmental adaptability test method . 33
8.1 Low temperature test method . 33
8.2 High temperature test method . 33
8.3 Temperature change test method . 33
8.4 Impact test method . 34
8.5 Vibration test method .. 34
8.6 Damp heat test method .. 34
8.7 Water drip test method . 34
Appendix A (Normative) Layout guidelines for test field and radiation tests . 35 Appendix B (Normative) Radiated spurious general test method. 38
References . 40
Technical requirements and measurement methods for
VHF/UHF frequency band radio monitoring receiver
1 Scope
This standard specifies the general requirements for VHF/UHF frequency band radio monitoring receiver, as well as the main technical parameters, indicator requirements and test methods for electrical performance, electromagnetic compatibility, electrical safety, and environmental adaptability.
This standard applies to VHF/UHF frequency band radio monitoring receiver. 2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard.
GB/T 2423.1 Environmental testing for electric and electronic and electronic products - Part 2. Test methods - Tests A. Cold
GB/T 2423.2 Environmental testing for electric and electronic products - Part 2. Test methods - Tests B. Dry heat
GB/T 2423.3 Environmental testing for electric and electronic products - Part 2. Testing method - Test Cab. Damp heat steady state
GB/T 2423.5 Environmental testing for electric and electronic products - Part 2. Test methods - Test Ea and guidance. Shock
GB/T 2423.10 Environmental testing for electric and electronic products - Part 2. Tests methods - Test Fc. Vibration (sinusoidal)
GB/T 2423.22 Environmental testing - Part 2. Tests methods - Test N.
Change of temperature
GB/T 2423.38 Environmental testing for electric and electronic products Part 2. Test methods Test R. Water test methods and guidelines
GB 4793.1 Safety requirements for electrical device for measurement,
control, and laboratory use - Part 1. General requirements
GB 4824-2013 Industrial, scientific and medical device - Radio-frequency disturbance characteristics - Limits and methods of measurement
GB 9254 Information technology device - Radio disturbance characteristics - Limits and methods of measurement
ITU-T P.53 ITU-T Recommendation P.53 Psophometers - Apparatus for the
objective measurement of circuit noise
3 Terms and definitions, abbreviations, and symbols
3.1 Terms and definitions
The following terms and definitions apply to this document.
3.1.1
VHF/UHF frequency band radio monitoring receiver
A receiver operating in the VHF or UHF band for radio spectrum monitoring and having certain demodulation analysis functions.
3.1.2
Standard SINAD
The ratio of the sum of power of signal, noise and distortion on the test load to the sum of power of noise and distortion.
Where.
S - The power of the useful audio signal produced by standard test
modulation, in milliwatts (mW);
N - The power of the noise under standard test modulation, in milliwatts (mW); D - The distorted power under standard test modulation, in milliwatts (mW). Signal-to-noise-and-distortion (SINAD), in decibels (dB).
The standard signal-to-noise-and-distortion value is defined as 12 dB for 4.1 General requirements
4.1.1 Operating frequency
VHF/UHF frequency band radio monitoring receiver operating frequency. 20 MHz ~ 3000 MHz.
4.1.2 Working mode
The VHF/UHF frequency band radio monitoring receiver can have multiple
operating modes to suit different application environment requirements, such as low noise mode of high sensitivity requirements, normal mode of high dynamic range requirements, and low distortion mode of high noise immunity requirements and so on.
4.1.3 Monitoring mode
The VHF/UHF frequency band radio monitoring receiver can be equipped with various monitoring modes to suit different functional requirements, such as fixed frequency monitoring mode (FFM), panoramic scanning monitoring mode (PSCAN) and so on.
4.1.4 Demodulation mode requirements
The VHF/UHF frequency band radio monitoring receiver shall have the analog demodulation function of frequency modulation, amplitude modulation and continuous wave signals, but is not limited to these three items.
4.1.5 Operating voltage and power supply mode
The VHF/UHF frequency band radio monitoring receiver can be powered by
external AC and DC power supplies, rechargeable battery packs or disposable battery packs. The power supply operating voltage is determined by the product itself.
4.1.6 Device auxiliary interface
The VHF/UHF frequency band radio monitoring receiver shall be equipped with an external earphone or microphone interface with an impedance of 600 ?? and a final intermediate frequency signal output interface. It can be configured with control and storage interfaces such as LAN, GPIB, and USB. It can be
5.1.4 Requirements of the sample under test
The sample to be tested may be the product that the manufacturer?€?s testing application or testing department makes spot check as required. For samples submitted for testing or spot check, the manufacturer shall provide the technical documents and testing assistance devices required for the testing before it can be tested. Testing assistance devices include. RF adapters or RF cables that can be connected to standard test instruments; power supply cables that can be connected to an external power supply; audio cables that can connect to the receiver's audio output ports. During the entire testing process, it should not open the enclosure for testing. If it needs to open the enclosure for testing, it shall be stated in the test report.
5.1.5 Electrical performance test frequency
When the VHF/UHF frequency band radio monitoring receiver is subject to electrical performance tests, it shall select a representative test frequency within its entire operating frequency range. Usually at least two test frequencies are selected per octave to ensure that the tested sample is, in its working frequency band, meeting the specified technical requirements.
5.1.6 Test signal
5.1.6.1 Frequency modulation signals
The standard test input signal for the VHF/UHF frequency band radio
monitoring receiver test is a frequency modulation RF signal the signal frequency, modulation, and signal level of which are in accordance with the following requirements.
a) The signal frequency is the nominal operating frequency of the receiver of the sample under test;
b) The modulation signal has a frequency of 1 kHz and a frequency offset of 5 kHz;
c) The signal level is variable in accordance with actual test requirements. 5.1.6.2 Amplitude modulation signal
The standard test input signal for th...

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