GB/T 6113.402-2022Specifications for radio disturbance and immunity measuring equipment and methods of measurement - Part 4-2: Uncertainty, statistics and limit value modeling Uncertainties of measuring equipment and facilities (English PDF)

3.1 Terms and Definitions

ISO /IEC Guide 98-3 and ISO /IEC Guide 99 define and the following terms and definitions apply to this document.

4.1 General

When judging the compliance of the EUT based on the disturbance limits, the uncertainties introduced by the measuring equipment and facilities given in this chapter shall be taken into account.

fixed degree.

For testing laboratories, each measurement uncertainty component in Chapters 5 to 9 should be considered to assess the MIU of each measurement item. to all The estimated value xi of each input quantity in the column should be evaluated for its standard uncertainty u(xi) (expressed in dB) and sensitivity coefficient ci. measured estimate The combined standard uncertainty uc(y) of the value y should be calculated according to formula (1).

4.2 Conformity assessment

The compliance determination for the disturbance limit value shall be carried out in the following manner.

If Ulab is less than or equal to UCISPR in Table 1, then.

--- If the measured disturbance level does not exceed the specified disturbance limit, it is judged to be in compliance;

--- If the measured disturbance level exceeds the specified disturbance limit, it is determined to be non-compliant.

If Ulab is greater than UCISPR in Table 1, then.

--- If the measured disturbance level plus (Ulab-UCISPR) does not exceed the disturbance limit value, it is judged to be in compliance;

--- If the measured disturbance level plus (Ulab-UCISPR) exceeds the disturbance limit, it is determined to be non-compliant.

Note. For the conformity assessment procedure specified in this article, the measured disturbance levels and disturbance limits are expressed in logarithmic units, for example, dB (uV/m).

5.1 Use V-AMN to measure conducted disturbances at power ports (see B.1)

5.1.1 Measurands for power port conducted disturbance measurement using V-AMN

V. Asymmetrical voltage measured at the EUT port of the AMN with respect to the reference ground plane, in decibel microvolts [dB(uV)].

5.1.2 Signs of specific input quantities for power port conducted disturbance measurement using V-AMN

FAMN. AMN voltage division coefficient, the unit is decibel (dB);

deltaFAMNf. the correction of the frequency interpolation error of the voltage division factor (VDF) of AMN, the unit is decibel (dB);

deltaDmains. Correction of errors caused by AC power and other power disturbances, in decibels (dB);

deltaVenv. the correction of the impact on the environment, in decibels (dB);

deltaZAMN. Correction for unsatisfactory AMN impedance, in decibels (dB).

5.1.3 Input quantities to be considered in the measurement of conducted disturbances at power ports using V-AMN

--- The reading of the receiver;

--- The attenuation introduced by the connection between the AMN and the receiver;

---AMN's VDF;

--- Frequency interpolation of VDF of AMN;

---Inputs related to the receiver.

* Accuracy of receiver sine wave voltage, * the pulse magnitude response of the receiver, * The receiver impulse response varies with the repetition rate, * The noise floor of the receiver;

---The impact of the mismatch between the receiver port of the AMN and the receiver;

--- Impedance of AMN;

--- The impact of disturbances generated by laboratory AC power or other power sources;

---Environmental influence.

5.2 Conducted disturbance measurement at power port using VP (see B.2)

5.2.1 Measurands for power port conducted disturbance measurement using VP

V. Asymmetrical voltage measured when 1500ohm is loaded at the EUT power port relative to the reference ground, the unit is decibel micro Volt [dB(uV)].

5.2.2 Signs of specific input quantities for power port conducted disturbance measurements using VP

FVP. VDF of the voltage probe, in decibels (dB);

deltaFVPf. Correction of the VDF frequency interpolation error of the voltage probe, the unit is decibel (dB);

deltaDmains. the correction of the error caused by the power supply disturbance, the unit is decibel (dB);

deltaVenv. the correction of the impact on the environment, in decibels (dB);

deltaZVP. Correction for the unsatisfactory impedance of the voltage probe, the unit is decibel (dB);

deltaZmains. Correction for errors caused by source impedance when compared to AMN, in decibels (dB).

5.2.3 Input quantities to be considered for power port conducted disturbance measurement using VP

--- The reading of the receiver;

--- The attenuation introduced by the connection between the VP and the receiver;

---VDF of VP;

--- Frequency interpolation of VDF of VP;

---Inputs related to the receiver.

* Accuracy of receiver sine wave voltage, * the pulse magnitude response of the receiver, * The receiver impulse response varies with the repetition rate, * The noise floor of the receiver;

---The impact of the mismatch between the receiver port of the VP and the receiver;

--- Impedance of VP;

---The impact of power disturbance;

--- The influence of source impedance when compared with AMN;

---Environmental influence.

5.3 Use AAN (Y-type network) to measure conducted disturbances at telecommunication ports (see B.3)

Note. The term "asymmetric artificial network (AAN)" is defined in CISPR16-1-2.It is also called Impedance Stabilization Network (ISN) in CISPR22.use terms The Y-shaped network is to distinguish it from the V-shaped network and the delta -shaped network.

5.3.1 Measurands for Conducted Disturbance Measurements at Telecom Ports Using AAN

V. Asymmetrical (common mode) voltage measured at the EUT port of the AAN relative to the reference ground plane, in decibel microvolts [dB(uV)].

5.3.2 Signs of specific input quantities for conducted disturbance measurements at telecommunication ports using AAN

FAAN. VDF of AAN, in decibels (dB);

deltaFAANf. Correction of VDF frequency interpolation error of AAN, unit is decibel (dB);

deltaDAE. the correction of the error caused by the disturbance from AE, the unit is decibel (dB);

deltaVenv. the correction of the impact on the environment, in decibels (dB);

deltaaLCL. unsatisfactory correction for AAN longitudinal conversion loss, in decibels (dB);

deltaZAAN. Correction for unsatisfactory AAN asymmetrical (common mode) impedance, in decibels (dB).

5.3.3 Input quantities to be considered in the measurement of conducted disturbances at telecommunication ports using AAN --- The reading of the receiver;

--- The attenuation introduced by the connection between the AAN and the receiver;

---VDF of AAN;

--- Frequency interpolation of VDF of AAN;

---Inputs related to the receiver.

* Accuracy of receiver sine wave voltage, * the pulse magnitude response of the receiver, * The receiver impulse response varies with the repetition rate, * The noise floor of the receiver;

---The impact of the mismatch between the receiver port of AAN and the receiver;

---Asymmetric impedance of AAN;

--- AAN longitudinal conversion loss;

--- Impact of harassment from AE;

---Environmental influence.

5.4 Measurement of conducted disturbances at telecommunication ports using CVP (see B.4)

5.4.1 Measurands for Conducted Disturbance Measurements at Telecom Ports Using CVP

V. Asymmetrical (common mode) voltage measured at a telecommunication port relative to reference ground, in decibel microvolts [dB(uV)].

5.4.2 Signs of specific input quantities for conducted disturbance measurements at telecommunication ports using CVP

FCVP. VDF of CVP, in decibels (dB);

deltaFCVPf. Correction of VDF frequency interpolation error of CVP, unit is decibel (dB);

deltaDAE. the correction of the error caused by the disturbance from AE, the unit is decibel (dB);

deltaVenv. the correction of the impact on the environment, in decibels (dB);

deltaFcpos. Correction for the effect of cable position in the CVP aperture on VDF, in decibels (dB);

deltaFcrad. Correction for the influence of cable radius on VDF, in decibels (dB);

deltaZAE. Correction for the unsatisfactory termination (impedance) of the telecommunication port generated by AE, the unit is decibel (dB);

deltaZCVP. Correction for the effect of CVP load impedance, in decibels (dB).

5.4.3 Input quantities to be considered in the measurement of conducted disturbances at telecommunication ports using CVP --- The reading of the receiver;

--- The attenuation introduced by the connection between the CVP and the receiver;

---VDF of CVP;

--- Frequency interpolation of VDF of CVP;

---Inputs related to the receiver.

* Accuracy of receiver sine wave voltage, * the pulse magnitude response of the receiver, * The receiver impulse response varies with the repetition rate, * The noise floor of the receiver;

--- Effect of cable position in CVP aperture on VDF;

---The effect of cable radius on VDF;

--- Impact of harassment from AE;

--- The effect of AE impedance when compared with AAN;

---The impact of the mismatch between the receiver port of CVP and the receiver;

--- Load impedance of CVP;

---Environmental influence.

5.5 Conducted disturbance measurement at telecommunication ports using CP (see B.5)

5.5.1 Measurands for Conducted Disturbance Measurements at Telecom Ports Using CP

I. asymmetrical (common mode) current measured on the EUT telecommunications port connection cable in decibel microampere [dB(uA)].

5.5.2 Signs of specific input quantities for conducted disturbance measurements at telecommunication ports using CP

YT. transfer admittance of CP, in decibel Siemens [dB(S)];

deltaYTf. Correction to CP transfer admittance frequency interpolation error, unit is decibel (dB);

deltaDAE. the correction of the error caused by the disturbance from AE, the unit is decibel (dB);

deltaIenv. the correction of the impact on the environment, in decibels (dB);

deltaZCP. the correction of the error caused by the insertion impedance of the CP, in decibels (dB);

deltaZAE. The unsatisfactory correction to the telecommunications port terminal (impedance) generated by AE, the unit is decibel (dB).

5.5.3 Input quantities to be considered in the measurement of conducted disturbances at telecommunication ports using CP --- The reading of the receiver;

--- The attenuation introduced by the connection between the CP and the receiver;

---Transfer admittance of CP;

---Frequency interpolation of transfer admittance of CP;

---Inputs related to the receiver.

* Accuracy of receiver sine wave voltage, * the pulse magnitude response of the receiver, * The receiver impulse response varies with the repetition rate, * The noise floor of the receiver;

--- Effect of mismatch between CP and receiver;

---Influence of CP insertion impedance;

--- Impact of harassment from AE;

--- Effect of AE on telecommunication cable termination impedance;

---Environmental influence.

5.6 Conducted disturbance measurements using CDNE (see B.7)

5.6.1 Measurands for Conducted Disturbance Measurement Using CDNE

V. relative to the reference ground, the asymmetric (common mode) disturbance voltage measured on the connecting line of the EUT through the CDNE, the unit is decibel microvolt [dB(uV)].

5.6.2 Signs of specific input quantities for conducted disturbance measurements using CDNE

FCDNE. VDF of CDNE, in decibels (dB);

deltaFCDNE. the correction of VDF frequency interpolation error of CDNE, the unit is decibel (dB);

deltaZCDNE. Correction for the unsatisfactory common mode impedance of CDNE, the unit is decibel (dB);

deltaDamb. the correction to the influence of environmental disturbance, the unit is decibel (dB);

deltaVgrounding. correction for unsatisfactory grounding, in decibels (dB);

deltaVenv. The correction of the impact on the environment, in decibels (dB).