MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 12.4 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 13.5 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 15 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 17.5 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 18 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 12.4 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 13.5 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 15 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 17.5 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 18 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 12.4 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 13.5 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 15 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 17.5 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 18 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 12.4 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 13.5 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 15 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 17.5 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 18 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 12.4 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 13.5 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 15 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 17.5 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 18 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 12.4 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 13.5 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 15 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 17.5 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 18 GHz
Degrees of equivalence: D_{i} and expanded uncertainty U_{i} (k = 2), both expressed in dB
Note that the terms D_{i} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 12.4 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.004  0.054 
NPL  0.009  0.031 
PTB  0.012  0.020 
NIST  0.007  0.027 
VNIIFTRI  0.121  0.063 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 13.5 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.008  0.063 
NPL  0.028  0.045 
PTB  0.009  0.033 
NIST  0.027  0.037 
VNIIFTRI  0.037  0.049 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 15 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.012  0.063 
NPL  0.004  0.034 
PTB  0.007  0.029 
NIST  0.017  0.033 
VNIIFTRI  0.024  0.046 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 17.5 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.010  0.056 
NPL  0.014  0.045 
PTB  0.010  0.028 
NIST  0.007  0.031 
VNIIFTRI  0.102  0.053 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 18 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.010  0.056 
NPL  0.002  0.031 
PTB  0.011  0.030 
NIST  0.001  0.030 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 12.4 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.001  0.055 
NPL  0.003  0.031 
PTB  0.007  0.021 
NIST  0.011  0.027 
VNIIFTRI  0.086  0.072 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 13.5 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.001  0.065 
NPL  0.012  0.044 
PTB  0.004  0.033 
NIST  0.033  0.037 
VNIIFTRI  0.040  0.050 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 15 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.004  0.063 
NPL  0.017  0.033 
PTB  0.005  0.029 
NIST  0.014  0.030 
VNIIFTRI  0.008  0.052 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 17.5 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.003  0.046 
NPL  0.028  0.062 
PTB  0.001  0.022 
NIST  0.002  0.022 
VNIIFTRI  0.204  0.052 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 18 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.004  0.061 
NPL  0.030  0.039 
PTB  0.032  0.039 
NIST  0.003  0.038 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 12.4 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.016  0.064 
NPL  0.005  0.071 
PTB  0.010  0.025 
NIST  0.019  0.036 
VNIIFTRI  0.093  0.072 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 13.5 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.008  0.073 
NPL  0.025  0.065 
PTB  0.007  0.039 
NIST  0.040  0.048 
VNIIFTRI  0.049  0.053 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 15 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.000  0.063 
NPL  0.001  0.048 
PTB  0.005  0.025 
NIST  0.006  0.034 
VNIIFTRI  0.026  0.066 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 17.5 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.005  0.066 
NPL  0.022  0.066 
PTB  0.015  0.031 
NIST  0.002  0.039 
VNIIFTRI  0.224  0.056 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 18 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.013  0.071 
NPL  0.038  0.065 
PTB  0.039  0.044 
NIST  0.011  0.048 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 12.4 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.002  0.044 
NPL  0.001  0.025 
PTB  0.021  0.024 
NIST  0.001  0.021 
VNIIFTRI  0.129  0.060 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 13.5 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.018  0.063 
NPL  0.030  0.044 
PTB  0.008  0.034 
NIST  0.029  0.037 
VNIIFTRI  0.031  0.047 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 15 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.009  0.063 
NPL  0.004  0.037 
PTB  0.006  0.029 
NIST  0.019  0.032 
VNIIFTRI  0.025  0.046 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 17.5 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.007  0.056 
NPL  0.004  0.044 
PTB  0.001  0.025 
NIST  0.009  0.029 
VNIIFTRI  0.160  0.049 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 18 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.009  0.058 
NPL  0.018  0.047 
PTB  0.022  0.033 
NIST  0.003  0.033 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 12.4 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.002  0.061 
NPL  0.007  0.032 
PTB  0.001  0.029 
NIST  0.004  0.026 
VNIIFTRI  0.040  0.064 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 13.5 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.023  0.068 
NPL  0.006  0.041 
PTB  0.011  0.028 
NIST  0.026  0.032 
VNIIFTRI  0.003  0.045 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 15 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.010  0.064 
NPL  0.003  0.036 
PTB  0.013  0.031 
NIST  0.042  0.040 
VNIIFTRI  0.026  0.042 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 17.5 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.003  0.050 
NPL  0.000  0.037 
PTB  0.003  0.023 
NIST  0.043  0.038 
VNIIFTRI  0.035  0.062 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 18 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.013  0.058 
NPL  0.016  0.048 
PTB  0.109  0.085 
NIST  0.029  0.038 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 12.4 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.001  0.065 
NPL  0.006  0.073 
PTB  0.002  0.030 
NIST  0.007  0.033 
VNIIFTRI  0.046  0.064 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 13.5 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.025  0.073 
NPL  0.010  0.064 
PTB  0.002  0.033 
NIST  0.032  0.041 
VNIIFTRI  0.015  0.046 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 15 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.003  0.070 
NPL  0.016  0.052 
PTB  0.007  0.031 
NIST  0.055  0.060 
VNIIFTRI  0.020  0.042 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 17.5 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.014  0.076 
NPL  0.022  0.073 
PTB  0.005  0.039 
NIST  0.026  0.050 
VNIIFTRI  0.030  0.067 
Results are presented under A4 printable format in Summary Results (.PDF file).
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 18 GHz
Lab i  D_{i}  U_{i} 
/ dB  / dB  
LNE  0.052  0.084 
NPL  0.014  0.084 
PTB  0.069  0.077 
NIST  0.003  0.066 
Results are presented under A4 printable format in Summary Results (.PDF file).
Metrology area, Subfield  Electricity and Magnetism, Radio frequencies 
Description  Excess noise ratio / noise temperature 
Time of measurements  1998  2000 
Status  Approved for equivalence 
Final Reports of the comparisons  
Measurand  Excess noise ratio 
Parameters  Frequency: 12.4 GHz, 13.5 GHz, 15 GHz, 17.5 GHz and 18 GHz 
Transfer device  Different noise sources 
Comparison type  Key Comparison 
Consultative Committee  CCEM (Consultative Committee for Electricity and Magnetism) 
Conducted by  CCEM (Consultative Committee for Electricity and Magnetism) 
Comments  A subsequent bilateral comparison was decided between VNIIFTRI and PTB. It is registered into the BIPM key comparison database under the identifier CCEM.RFK9.1.
Results published on 13 February 2006 Excess noise ratio

Pilot institute 
LNE
Laboratoire national de métrologie et d'essais France 
Contact person  D. Allal +33 (0) 1 30 69 21 50 
Pilot laboratory  

LNE 
Laboratoire national de métrologie et d'essais, France, EURAMET 
NIST 
National Institute of Standards and Technology, United States, SIM 
NPL 
National Physical Laboratory, United Kingdom, EURAMET 
PTB 
PhysikalischTechnische Bundesanstalt, Germany, EURAMET 
VNIIFTRI 
Institute of Physical Technical and Radiotechnical Measurements, Rosstandart, Russian Federation, COOMET 
This page proposes printout on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
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MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 12.4 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.696 dB, u_{R} = 0.005 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 13.5 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.710 dB, u_{R} = 0.012 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 15 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.693 dB, u_{R} = 0.007 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 17.5 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.673 dB, u_{R} = 0.006 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 18 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.656 dB, u_{R} = 0.004 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 12.4 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.784 dB, u_{R} = 0.004 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 13.5 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.834 dB, u_{R} = 0.012 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 15 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.840 dB, u_{R} = 0.005 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 17.5 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.695 dB, u_{R} = 0.001 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 18 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.578 dB, u_{R} = 0.013 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 12.4 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.862 dB, u_{R} = 0.008 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 13.5 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.921 dB, u_{R} = 0.015 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 15 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.956 dB, u_{R} = 0.002 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 17.5 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.831 dB, u_{R} = 0.008 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 18 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.728 dB, u_{R} = 0.016 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 12.4 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.759 dB, u_{R} = 0.001 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 13.5 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.785 dB, u_{R} = 0.012 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 15 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.770 dB, u_{R} = 0.007 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 17.5 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.762 dB, u_{R} = 0.004 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 18 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 15.753 dB, u_{R} = 0.009 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 12.4 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 4.845 dB, u_{R} = 0.002 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 13.5 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 4.757 dB, u_{R} = 0.008 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 15 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 4.707 dB, u_{R} = 0.009 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 17.5 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 4.880 dB, u_{R} = 0.002 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 18 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 4.860 dB, u_{R} = 0.015 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 12.4 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 4.950 dB, u_{R} = 0.003 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 13.5 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 4.868 dB, u_{R} = 0.010 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 15 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 4.846 dB, u_{R} = 0.008 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 17.5 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 5.026 dB, u_{R} = 0.011 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 18 GHz
The key comparison reference value x_{R} is calculated as the unweighted mean of the participants results with exclusion of outliers. Its standard uncertainty u_{R} is computed as given in page 112 of the Final Report. x_{R} = 4.992 dB, u_{R} = 0.025 dB 
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in dB: D_{i} = (x_{i}  x_{R}) and its expanded uncertainty U_{i} (k = 2). The equations for the computation of U_{i}_{ }are given in page 112 of the Final Report. 
The degree of equivalence between two laboratories i and j is given by two terms both expressed in dB: D_{ij} = (D_{i}  D_{j}) and its expanded uncertainty U_{ij} (k = 2) with U_{ij }= 2(u_{i}^{2} + u_{j}^{2})^{1/2}. 
Note that the terms D_{i} and D_{ij} are computed with the opposite sign in the Final Report.
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 12.4 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.700  0.038  Sep 97, Jan 99, Dec 00 
NPL  15.687  0.021  May 98 
PTB  15.709  0.013  Jun 97, Apr 99 
NIST  15.689  0.018  Apr 00 
VNIIFTRI  15.817  0.031  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 13.5 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.718  0.038  Sep 97, Jan 99, Dec 00 
NPL  15.682  0.024  May 98 
PTB  15.719  0.015  Jun 97, Apr 99 
NIST  15.683  0.018  Apr 00 
VNIIFTRI  15.747  0.027  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 15 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.681  0.039  Sep 97, Jan 99, Dec 00 
NPL  15.689  0.020  May 98 
PTB  15.700  0.016  Jun 97, Apr 99 
NIST  15.676  0.019  Apr 00 
VNIIFTRI  15.717  0.028  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 17.5 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.683  0.039  Sep 97, Jan 99, Dec 00 
NPL  15.659  0.031  May 98 
PTB  15.683  0.018  Jun 97, Apr 99 
NIST  15.666  0.020  Apr 00 
VNIIFTRI  15.775  0.026  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA1
REFERENCE PLANE : R140
FREQUENCY : 18 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.666  0.039  Sep 97, Jan 99, Dec 00 
NPL  15.658  0.021  May 98 
PTB  15.645  0.021  Jun 97, Apr 99 
NIST  15.655  0.020  Apr 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 12.4 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.785  0.039  Sep 97, Jan 99, Dec 00 
NPL  15.787  0.021  May 98 
PTB  15.792  0.014  Jun 97, Apr 99 
NIST  15.773  0.018  Apr 00 
VNIIFTRI  15.870  0.036  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 13.5 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.835  0.039  Sep 97, Jan 99, Dec 00 
NPL  15.822  0.024  May 98 
PTB  15.838  0.015  Jun 97, Apr 99 
NIST  15.801  0.018  Apr 00 
VNIIFTRI  15.874  0.028  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 15 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.836  0.040  Sep 97, Jan 99, Dec 00 
NPL  15.857  0.020  May 98 
PTB  15.835  0.018  Jun 97, Apr 99 
NIST  15.826  0.018  Apr 00 
VNIIFTRI  15.848  0.033  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 17.5 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.692  0.040  Sep 97, Jan 99, Dec 00 
NPL  15.667  0.031  May 98 
PTB  15.696  0.019  Jun 97, Apr 99 
NIST  15.697  0.019  Apr 00 
VNIIFTRI  15.899  0.026  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7 / R140
FREQUENCY : 18 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.582  0.039  Sep 97, Jan 99, Dec 00 
NPL  15.608  0.021  May 98 
PTB  15.546  0.021  Jun 97, Apr 99 
NIST  15.575  0.020  Apr 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 12.4 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.877  0.044  Sep 97, Jan 99, Dec 00 
NPL  15.856  0.049  May 98 
PTB  15.871  0.014  Jun 97, Apr 99 
NIST  15.842  0.023  Apr 00 
VNIIFTRI  15.954  0.035  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 13.5 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.929  0.043  Sep 97, Jan 99, Dec 00 
NPL  15.896  0.037  May 98 
PTB  15.928  0.016  Jun 97, Apr 99 
NIST  15.881  0.024  Apr 00 
VNIIFTRI  15.970  0.028  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 15 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.956  0.045  Sep 97, Jan 99, Dec 00 
NPL  15.957  0.034  May 98 
PTB  15.961  0.018  Jun 97, Apr 99 
NIST  15.950  0.024  Apr 00 
VNIIFTRI  15.982  0.033  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 17.5 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.836  0.045  Sep 97, Jan 99, Dec 00 
NPL  15.809  0.045  May 98 
PTB  15.847  0.019  Jun 97, Apr 99 
NIST  15.833  0.025  Apr 00 
VNIIFTRI  16.055  0.027  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB1
REFERENCE PLANE : PC7
FREQUENCY : 18 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.741  0.045  Sep 97, Jan 99, Dec 00 
NPL  15.766  0.040  May 98 
PTB  15.689  0.021  Jun 97, Apr 99 
NIST  15.717  0.025  Apr 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 12.4 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.761  0.038  Sep 97, Jan 99, Dec 00 
NPL  15.758  0.022  Apr 97, Mar  Apr 99 
PTB  15.780  0.012  Feb 98 
NIST  15.758  0.018  Apr 00 
VNIIFTRI  15.888  0.030  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 13.5 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.803  0.038  Sep 97, Jan 99, Dec 00 
NPL  15.755  0.024  Apr 97, Mar  Apr 99 
PTB  15.793  0.015  Feb 98 
NIST  15.756  0.018  Apr 00 
VNIIFTRI  15.816  0.026  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 15 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.761  0.040  Sep 97, Jan 99, Dec 00 
NPL  15.766  0.022  Apr 97, Mar  Apr 99 
PTB  15.776  0.016  Feb 98 
NIST  15.751  0.018  Apr 00 
VNIIFTRI  15.795  0.028  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 17.5 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.770  0.039  Sep 97, Jan 99, Dec 00 
NPL  15.766  0.031  Apr 97, Mar  Apr 99 
PTB  15.761  0.017  Feb 98 
NIST  15.753  0.020  Apr 00 
VNIIFTRI  15.922  0.024  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSA2
REFERENCE PLANE : R140
FREQUENCY : 18 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  15.761  0.039  Sep 97, Jan 99, Dec 00 
NPL  15.770  0.031  Apr 97, Mar  Apr 99 
PTB  15.730  0.020  Feb 98 
NIST  15.749  0.020  Apr 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 12.4 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  4.843  0.043  Sep 97, Jan 99, Dec 00 
NPL  4.852  0.023  Apr 97, Mar  Apr 99 
PTB  4.844  0.020  Feb 98 
NIST  4.841  0.018  Apr 00 
VNIIFTRI  4.885  0.032  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 13.5 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  4.779  0.042  Sep 97, Jan 99, Dec 00 
NPL  4.751  0.024  Apr 97, Mar  Apr 99 
PTB  4.768  0.015  Feb 98 
NIST  4.731  0.018  Apr 00 
VNIIFTRI  4.754  0.027  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 15 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  4.717  0.044  Sep 97, Jan 99, Dec 00 
NPL  4.710  0.023  Apr 97, Mar  Apr 99 
PTB  4.720  0.018  Feb 98 
NIST  4.665  0.018  Apr 00 
VNIIFTRI  4.681  0.027  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 17.5 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  4.876  0.043  Sep 97, Jan 99, Dec 00 
NPL  4.880  0.032  Apr 97, Mar  Apr 99 
PTB  4.883  0.020  Feb 98 
NIST  4.836  0.019  Apr 00 
VNIIFTRI  4.845  0.031  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7 / R140
FREQUENCY : 18 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  4.873  0.043  Sep 97, Jan 99, Dec 00 
NPL  4.877  0.033  Apr 97, Mar  Apr 99 
PTB  4.751  0.040  Feb 98 
NIST  4.831  0.021  Apr 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 12.4 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  4.949  0.046  Sep 97, Jan 99, Dec 00 
NPL  4.956  0.052  Apr 97, Mar  Apr 99 
PTB  4.952  0.021  Feb 98 
NIST  4.943  0.023  Apr 00 
VNIIFTRI  4.996  0.032  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 13.5 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  4.893  0.046  Sep 97, Jan 99, Dec 00 
NPL  4.858  0.039  Apr 97, Mar  Apr 99 
PTB  4.870  0.017  Feb 98 
NIST  4.836  0.023  Apr 00 
VNIIFTRI  4.883  0.027  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 15 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  4.849  0.048  Sep 97, Jan 99, Dec 00 
NPL  4.831  0.035  Apr 97, Mar  Apr 99 
PTB  4.839  0.019  Feb 98 
NIST  4.791  0.029  Apr 00 
VNIIFTRI  4.866  0.028  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 17.5 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  5.040  0.047  Sep 97, Jan 99, Dec 00 
NPL  5.005  0.045  Apr 97, Mar  Apr 99 
PTB  5.031  0.021  Feb 98 
NIST  5.000  0.029  Apr 00 
VNIIFTRI  5.056  0.041  Sep  Oct 00 
MEASURAND : Excess noise ratio
NOISE SOURCE : TSB2
REFERENCE PLANE : PC7
FREQUENCY : 18 GHz
x_{i} : averaged Excess noise ratio measured by laboratory i
u_{i} : averaged standard uncertainty of x_{i}
Lab i  x_{i} / dB  u_{i }/ dB  Date of measurement 
LNE  5.044  0.047  Sep 97, Jan 99, Dec 00 
NPL  5.006  0.047  Apr 97, Mar  Apr 99 
PTB  4.923  0.041  Feb 98 
NIST  4.995  0.030  Apr 00 