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Comparison
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Results
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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 12.4 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in dB

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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 13.5 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in dB

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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 15 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in dB

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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 17.5 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in dB

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MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 12.4 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in K

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MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 13.5 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in K

print out

MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 15 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in K

print out

MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 17.5 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in K

Comparison
Comparison close
Results
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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 12.4 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in dB

Results are presented under A4 printable format in Summary Results (.PDF file).

print out

MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 13.5 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in dB

Results are presented under A4 printable format in Summary Results (.PDF file).

print out

MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 15 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in dB

Results are presented under A4 printable format in Summary Results (.PDF file).

print out

MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 17.5 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in dB

Results are presented under A4 printable format in Summary Results (.PDF file).

print out

MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 12.4 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in K

Results are presented under A4 printable format in Summary Results (.PDF file).

print out

MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 13.5 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in K

Results are presented under A4 printable format in Summary Results (.PDF file).

print out

MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 15 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in K

Results are presented under A4 printable format in Summary Results (.PDF file).

print out

MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 17.5 GHz

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), both expressed in K

Results are presented under A4 printable format in Summary Results (.PDF file).

Comparison
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CC comparison
Linked comparison
CCEM.RF-K9.1
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Metrology area, Sub-field Electricity and Magnetism, Radio frequencies
Description Excess noise ratio / noise temperature
Time of measurements 2003 - 2007
Status Approved for equivalence
Final Reports of the comparisons
Metrologia, 2009, 46, Tech. Suppl., 01007
Measurand Noise temperature and excess noise ratio
Parameters Frequency: 12.4 GHz, 13.5 GHz, 15.0 GHz and 17.5 GHz
Transfer device Waveguide gas discharge noise generator, power supply and reserve gas discharge tube
Comparison type Key Comparison
Consultative Committee CCEM (Consultative Committee for Electricity and Magnetism)
Conducted by CCEM (Consultative Committee for Electricity and Magnetism)
Comments

This comparison is a bilateral key comparison subsequent to CCEM.RF-K9. It was undertaken to provide VNIIFTRI an opportunity to confirm that it had corrected problems that it experienced in CCEM.RF-K9.
Compared to CCEM.RF-K9, CCEM.RF-K9.1 used fewer travelling standards, did not address the effects of adapters, and used a travelling standard with a substantially different ENR (approximately 18 dB instead of approximately 16 dB or 4 dB, as in CCEM.RF-K9).
Therefore, it was decided that there would be no formal linkage of CCEM.RF-K9.1 results to those of CCEM.RF-K9.

Results published on 29 July 2009

Noise temperature and 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
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
LNE

Laboratoire national de métrologie et d'essais, France, EURAMET

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

VNIIFTRI

Institute of Physical Technical and Radiotechnical Measurements, Rosstandart, Russian Federation, COOMET

Comparison
Comparison close
Results
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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 12.4 GHz

The key comparison reference value xENR R is calculated as the unweighted mean of the participants results. Its standard uncertainty uENR R is calculated as the experimental standard deviation of the mean.

xENR R = 17.926 dB, uENR R = 0.022 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:
Di = (xENR i - xENR R) and its expanded uncertainty Ui (k = 2).

No pair-wise degrees of equivalence are computed for this comparison.
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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 13.5 GHz

The key comparison reference value xENR R is calculated as the unweighted mean of the participants results. Its standard uncertainty uENR R is calculated as the experimental standard deviation of the mean.

xENR R = 17.9415 dB, uENR R = 0.0105 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:
Di = (xENR i - xENR R) and its expanded uncertainty Ui (k = 2).

No pair-wise degrees of equivalence are computed for this comparison.
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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 15 GHz

The key comparison reference value xENR R is calculated as the unweighted mean of the participants results. Its standard uncertainty uENR R is calculated as the experimental standard deviation of the mean.

xENR R = 17.9175 dB, uENR R = 0.0115 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:
Di = (xENR i - xENR R) and its expanded uncertainty Ui (k = 2).

No pair-wise degrees of equivalence are computed for this comparison.
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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 17.5 GHz

The key comparison reference value xENR R is calculated as the unweighted mean of the participants results. Its standard uncertainty uENR R is calculated as the experimental standard deviation of the mean.

xENR R = 17.9275 dB, uENR R = 0.0225 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:
Di = (xENR i - xENR R) and its expanded uncertainty Ui (k = 2).

No pair-wise degrees of equivalence are computed for this comparison.
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MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 12.4 GHz

The key comparison reference value xT R is calculated as the unweighted mean of the participants results. Its standard uncertainty uT R is calculated as the experimental standard deviation of the mean.

xT R = 18278.5 K, uT R = 91.5 K

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in K:
Di = (xT i - xT R) and its expanded uncertainty Ui (k = 2).

No pair-wise degrees of equivalence are computed for this comparison.
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MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 13.5 GHz

The key comparison reference value xT R is calculated as the unweighted mean of the participants results. Its standard uncertainty uT R is calculated as the experimental standard deviation of the mean.

xT R = 18342.5 K, uT R = 44.5 K

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in K:
Di = (xT i - xT R) and its expanded uncertainty Ui (k = 2).

No pair-wise degrees of equivalence are computed for this comparison.
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MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 15 GHz

The key comparison reference value xT R is calculated as the unweighted mean of the participants results. Its standard uncertainty uT R is calculated as the experimental standard deviation of the mean.

xT R = 18243 K, uT R = 47 K

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in K:
Di = (xT i - xT R) and its expanded uncertainty Ui (k = 2).

No pair-wise degrees of equivalence are computed for this comparison.
print out

MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 17.5 GHz

The key comparison reference value xT R is calculated as the unweighted mean of the participants results. Its standard uncertainty uT R is calculated as the experimental standard deviation of the mean.

xT R = 18285 K, uT R = 93 K

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by two terms both expressed in K:
Di = (xT i - xT R) and its expanded uncertainty Ui (k = 2).

No pair-wise degrees of equivalence are computed for this comparison.
Comparison
Comparison close
Results
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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 12.4 GHz

xENR i : Excess noise ratio measured by laboratory i
uENR i : standard uncertainty of xENR i

 Lab i xENR i / dB uENR i / dB Date of measurement
 PTB 17.904 0.025 Dec 03
 VNIIFTRI 17.948 0.032 Feb - Apr 07

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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 13.5 GHz

xENR i : Excess noise ratio measured by laboratory i
uENR i : standard uncertainty of xENR i

 Lab i xENR i / dB uENR i / dB Date of measurement
 PTB 17.931 0.029 Dec 03
 VNIIFTRI 17.952 0.038 Feb - Apr 07

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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 15 GHz

xENR i : Excess noise ratio measured by laboratory i
uENR i : standard uncertainty of xENR i

 Lab i xENR i / dB uENR i / dB Date of measurement
 PTB 17.929 0.032 Dec 03
 VNIIFTRI 17.906 0.035 Feb - Apr 07

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MEASURAND : Excess noise ratio
TRAVELLING STANDARD : Waveguide gas discharge noise generator
NOMINAL VALUE : 18 dB
FREQUENCY : 17.5 GHz

xENR i : Excess noise ratio measured by laboratory i
uENR i : standard uncertainty of xENR i

 Lab i xENR i / dB uENR i / dB Date of measurement
 PTB 17.905 0.036 Dec 03
 VNIIFTRI 17.950 0.046 Feb - Apr 07

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MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 12.4 GHz

xT i : Noise temperature measured by laboratory i
uT i : standard uncertainty of xT i

 Lab i xT i / K uT i / K Date of measurement
 PTB 18187 105 Dec 03
 VNIIFTRI 18370 134 Feb - Apr 07

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MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 13.5 GHz

xT i : Noise temperature measured by laboratory i
uT i : standard uncertainty of xT i

 Lab i xT i / K uT i / K Date of measurement
 PTB 18298 122 Dec 03
 VNIIFTRI 18387 158 Feb - Apr 07

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MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 15 GHz

xT i : Noise temperature measured by laboratory i
uT i : standard uncertainty of xT i

 Lab i xT i / K uT i / K Date of measurement
 PTB 18290 135 Dec 03
 VNIIFTRI 18196 145 Feb - Apr 07

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MEASURAND : Noise temperature
TRAVELLING STANDARD : Waveguide gas discharge noise generator
FREQUENCY : 17.5 GHz

xT i : Noise temperature measured by laboratory i
uT i : standard uncertainty of xT i

 Lab i xT i / K uT i / K Date of measurement
 PTB 18192 147 Dec 03
 VNIIFTRI 18378 190 Feb - Apr 07