The KCDB - the BIPM key comparison database – supports the CIPM MRA. The KCDB contains information on the internationally recognized Calibration and Measurement Capabilities (CMCs) for services available from the participating institutes, and the key and supplementary comparisons supporting these CMCs.

All data listed in the KCDB have been reviewed and approved within the CIPM Mutual Recognition Arrangement
**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 12.4 GHz

Degrees of equivalence: *D _{i}* and expanded uncertainty

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 13.5 GHz

Degrees of equivalence: *D _{i}* and expanded uncertainty

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 15 GHz

Degrees of equivalence: *D _{i}* and expanded uncertainty

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 17.5 GHz

Degrees of equivalence: *D _{i}* and expanded uncertainty

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

Degrees of equivalence: *D _{i}* and expanded uncertainty

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

Degrees of equivalence: *D _{i}* and expanded uncertainty

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

Degrees of equivalence: *D _{i}* and expanded uncertainty

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

Degrees of equivalence: *D _{i}* and expanded uncertainty

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 12.4 GHz

Degrees of equivalence: *D _{i}* and expanded uncertainty

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

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 13.5 GHz

Degrees of equivalence: *D _{i}* and expanded uncertainty

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

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 15 GHz

Degrees of equivalence: *D _{i}* and expanded uncertainty

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

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 17.5 GHz

Degrees of equivalence: *D _{i}* and expanded uncertainty

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

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

Degrees of equivalence: *D _{i}* and expanded uncertainty

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

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

Degrees of equivalence: *D _{i}* and expanded uncertainty

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

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

Degrees of equivalence: *D _{i}* and expanded uncertainty

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

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

Degrees of equivalence: *D _{i}* and expanded uncertainty

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

CCEM.RF-K9.1

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 | |

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.
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 |

This page proposes print-out on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).

Please, select items to be printed out, then click on "OK" :

Results:

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 12.4 GHz

The key comparison reference value is calculated as the unweighted mean of the participants results. Its standard uncertainty _{R} is calculated as the experimental standard deviation of the mean.u_{ENR} _{R}
u_{ENR }_{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: and its expanded uncertainty D = (_{i}x_{ENR} _{i} - x_{ENR} _{R}) (U_{i}k = 2). |

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

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 13.5 GHz

The key comparison reference value is calculated as the unweighted mean of the participants results. Its standard uncertainty _{R} is calculated as the experimental standard deviation of the mean.u_{ENR} _{R}
u_{ENR }_{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: and its expanded uncertainty D = (_{i}x_{ENR} _{i} - x_{ENR} _{R}) (U_{i}k = 2). |

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

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 15 GHz

The key comparison reference value is calculated as the unweighted mean of the participants results. Its standard uncertainty _{R} is calculated as the experimental standard deviation of the mean.u_{ENR} _{R}
u_{ENR }_{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: and its expanded uncertainty D = (_{i}x_{ENR} _{i} - x_{ENR} _{R}) (U_{i}k = 2). |

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

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 17.5 GHz

is calculated as the unweighted mean of the participants results. Its standard uncertainty _{R} is calculated as the experimental standard deviation of the mean.u_{ENR} _{R}
u_{ENR }_{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: and its expanded uncertainty D = (_{i}x_{ENR} _{i} - x_{ENR} _{R}) (U_{i}k = 2). |

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

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

The key comparison reference value is calculated as the unweighted mean of the participants results. Its standard uncertainty _{R} is calculated as the experimental standard deviation of the mean.u_{T} _{R}
u_{T }_{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: and its expanded uncertainty D = (_{i}x_{T} _{i} - x_{T} _{R}) (U_{i}k = 2). |

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

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

The key comparison reference value is calculated as the unweighted mean of the participants results. Its standard uncertainty _{R} is calculated as the experimental standard deviation of the mean.u_{T} _{R}
u_{T }_{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: and its expanded uncertainty D = (_{i}x_{T} _{i} - x_{T} _{R}) (U_{i}k = 2). |

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

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

The key comparison reference value is calculated as the unweighted mean of the participants results. Its standard uncertainty _{R} is calculated as the experimental standard deviation of the mean.u_{T} _{R}
u_{T }_{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: and its expanded uncertainty D = (_{i}x_{T} _{i} - x_{T} _{R}) (U_{i}k = 2). |

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

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

is calculated as the unweighted mean of the participants results. Its standard uncertainty _{R} is calculated as the experimental standard deviation of the mean.u_{T} _{R}
u_{T }_{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: and its expanded uncertainty D = (_{i}x_{T} _{i} - x_{T} _{R}) (U_{i}k = 2). |

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

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 12.4 GHz

** x_{ENR i}** : Excess noise ratio measured by laboratory

Lab i |
x/ dB_{ENR} _{i} |
u_{ENR} / dB_{i } |
Date of measurement |

PTB | 17.904 | 0.025 | Dec 03 |

VNIIFTRI | 17.948 | 0.032 | Feb - Apr 07 |

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 13.5 GHz

** x_{ENR i}** : Excess noise ratio measured by laboratory

Lab i |
x/ dB_{ENR} _{i} |
u_{ENR} / dB_{i } |
Date of measurement |

PTB | 17.931 | 0.029 | Dec 03 |

VNIIFTRI | 17.952 | 0.038 | Feb - Apr 07 |

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 15 GHz

** x_{ENR i}** : Excess noise ratio measured by laboratory

Lab i |
x/ dB_{ENR} _{i} |
u_{ENR} / dB_{i } |
Date of measurement |

PTB | 17.929 | 0.032 | Dec 03 |

VNIIFTRI | 17.906 | 0.035 | Feb - Apr 07 |

**MEASURAND : Excess noise ratioTRAVELLING STANDARD : Waveguide gas discharge noise generator**

FREQUENCY : 17.5 GHz

** x_{ENR i}** : Excess noise ratio measured by laboratory

Lab i |
x/ dB_{ENR} _{i} |
u_{ENR} / dB_{i } |
Date of measurement |

PTB | 17.905 | 0.036 | Dec 03 |

VNIIFTRI | 17.950 | 0.046 | Feb - Apr 07 |

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

** x_{T i}** : Noise temperature measured by laboratory

Lab i |
x/ K_{T} _{i} |
u_{T} / K_{i } |
Date of measurement |

PTB | 18187 | 105 | Dec 03 |

VNIIFTRI | 18370 | 134 | Feb - Apr 07 |

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

** x_{T i}** : Noise temperature measured by laboratory

Lab i |
x/ K_{T} _{i} |
u_{T} / K_{i } |
Date of measurement |

PTB | 18298 | 122 | Dec 03 |

VNIIFTRI | 18387 | 158 | Feb - Apr 07 |

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

** x_{T i}** : Noise temperature measured by laboratory

Lab i |
x/ K_{T} _{i} |
u_{T} / K_{i } |
Date of measurement |

PTB | 18290 | 135 | Dec 03 |

VNIIFTRI | 18196 | 145 | Feb - Apr 07 |

**MEASURAND : Noise temperatureTRAVELLING STANDARD : Waveguide gas discharge noise generator**

** x_{T i}** : Noise temperature measured by laboratory

Lab i |
x/ K_{T} _{i} |
u_{T} / K_{i } |
Date of measurement |

PTB | 18192 | 147 | Dec 03 |

VNIIFTRI | 18378 | 190 | Feb - Apr 07 |