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Mexico, CENAM (Centro Nacional de Metrologia)
Complete CMCs in Electricity and Magnetism for Mexico (.PDF file)
Phase angle: meters. Phase meter, 0 rad to 2 rad
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in µrad: 20
Direct comparison
Voltage: 120 V, 240 V
Current: 1 A, 5 A
Frequency: 60 Hz
Approved on 05 January 2012
Internal NMI service identifier: CENAM/E012-001I-CC
 
Reflection coefficient: on coaxial phase (with magnitude of reflection coefficient above or equal to 0.1). 1-port coaxial device, -180 ° to 180 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °: 0.45 to 2.00
Vector automatic network analyzer
Frequency: 2 GHz to 10 GHz
Connector: Type N
Approved on 09 October 2012
Internal NMI service identifier: CENAM/410-E002-001-CC, -002-CC, -008-CC
Uncertainty table
 
Reflection coefficient: on coaxial phase (with magnitude of reflection coefficient above or equal to 0.1). 1-port coaxial device, -180 ° to 180 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °: 0.57 to 3.72
Vector automatic network analyzer
Frequency: 10 GHz to 18 GHz
Connector: Type N
Approved on 09 October 2012
Internal NMI service identifier: CENAM/410-E002-001-CC, -002-CC, -008-CC
Uncertainty table
 
Reflection coefficient: on coaxial magnitude. 1- or 2-port coaxial device , 0 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.0035 to 0.0159
Vector automatic network analyzer
Frequency: 45 MHz to 18 GHz
Connector: Type N
Approved on 09 October 2012
Uncertainty table
 
Reflection coefficient: on coaxial phase (with magnitude of reflection coefficient below or equal to 0.1). 1- or 2-port coaxial device , -180 ° to 180 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °: 1.20 to 180
Vector automatic network analyzer
Frequency: 45 MHz to 18 GHz
Connector: Type N
Approved on 09 October 2012
Uncertainty table
 
Reflection coefficient: on coaxial phase (with magnitude of reflection coefficient above or equal to 0.1). 1- or 2-port coaxial device , -180 ° to 180 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °: 0.29 to 4.09
Vector automatic network analyzer
Frequency: 45 MHz to 18 GHz
Connector: Type N
Approved on 09 October 2012
Uncertainty table
 
Transmission coefficient: on coaxial magnitude. 2-port coaxial device, 0 dB to 20 dB
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in dB: 0.023 to 0.037
Vector automatic network analyzer
Frequency: 45 MHz to 2 GHz
Connector: Type N
Approved on 09 October 2012
Internal NMI service identifier: CENAM/410-E002-(001, 002, 003, 004, 007)-CC
Uncertainty table
 
RF power: calibration factor in coaxial. Thermistor mount in Type-N connector, 0.900 to 1.000
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.0037 to 0.0095
DC substitution
Power level: 1 mW
Frequency: 10 MHz to 18 GHz
Approved on 09 October 2012
Uncertainty value depends on frequency
Internal NMI service identifier: CENAM/E018-001-CC
Uncertainty table
 
RF power: calibration factor in coaxial. Power detector (thermo-couple or diode) in Type-N connector, 0.900 to 1.000
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.011 to 0.013
DC substitution
Power level: 1 mW
Frequency: 10 MHz to 18 GHz
Approved on 09 October 2012
Uncertainty value depends on frequency
Internal NMI service identifier: CENAM/E018-001-CC
Uncertainty table
 
Reflection coefficient s11: on coaxial magnitude. 2-port coaxial device, 0 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.0037 to 0.0081
Vector automatic network analyzer
Frequency: 45 MHz to 2 GHz
Connector: Type N
Approved on 09 October 2012
Internal NMI service identifier: CENAM/410-E002-001-CC, -002-CC, -004-CC, -007-CC
Uncertainty table
 
Reflection coefficient s11: on coaxial magnitude. 2-port coaxial device, 0 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.0058 to 0.0158
Vector automatic network analyzer
Frequency: 2 GHz to 10 GHz
Connector: Type N
Approved on 09 October 2012
Internal NMI service identifier: CENAM/410-E002-001-CC, -002-CC, -004-CC, -007-CC
Uncertainty table
 
Reflection coefficient s11: on coaxial magnitude. 2-port coaxial device, 0 to 1
Absolute expanded uncertainty (k = 2, level of confidence 95 %): 0.0152 to 0.0213
Vector automatic network analyzer
Frequency: 10 GHz to 18 GHz
Connector: Type N
Approved on 09 October 2012
Internal NMI service identifier: CENAM/410-E002-001-CC, -002-CC, -004-CC, -007-CC
Uncertainty table
 
Reflection coefficient s11: on coaxial phase (with magnitude of reflection coefficient below or equal to 0.1). 2-port coaxial device, -180 ° to 180 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °: 2.16 to 180
Vector automatic network analyzer
Frequency: 45 MHz to 2 GHz
Connector: Type N
Approved on 09 October 2012
Internal NMI service identifier: CENAM/410-E002-001-CC, -002-CC, -004-CC, -007-CC
Uncertainty table
 
Reflection coefficient s11: on coaxial phase (with magnitude of reflection coefficient below or equal to 0.1). 2-port coaxial device, -180 ° to 180 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °: 2.60 to 180
Vector automatic network analyzer
Frequency: 2 GHz to 10 GHz
Connector: Type N
Approved on 09 October 2012
Internal NMI service identifier: CENAM/410-E002-001-CC, -002-CC, -004-CC, -007-CC
Uncertainty table
 
Reflection coefficient s11: on coaxial phase (with magnitude of reflection coefficient below or equal to 0.1). 2-port coaxial device, -180 ° to 180 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in °: 6.12 to 180
Vector automatic network analyzer
Frequency: 10 GHz to 18 GHz
Connector: Type N
Approved on 09 October 2012
Internal NMI service identifier: CENAM/410-E002-001-CC, -002-CC, -004-CC, -007-CC
Uncertainty table
 
Time scale difference. Local clock, -1 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ns: 2
Local clock vs UTC(CNM)
Averaging time: 1 hour
Approved on 25 February 2009
 
Time scale difference. Local clock, -1 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ns: 20
Local clock vs UTC
Averaging time: 5 days
This service requires the publication of the Circular T of the BIPM corresponding to dates when the calibration services were performed in order to know the time difference between the clock under calibration and UTC
Approved on 25 February 2009
 
Time scale difference. Remote clock, -1 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ns: 15
Remote clock vs UTC(CNM)
Averaging time: 1 day
GPS common-view comparison using multichannel GPS receiver
Approved on 25 February 2009
 
Time scale difference. Remote clock, -1 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ns: 25
Remote clock vs UTC
Averaging time: 5 days
GPS common-view comparison using multichannel GPS receiver
This service requires the publication of the Circular T of the BIPM corresponding to dates when the calibration services were performed in order to know the time difference between the clock under calibration and UTC
Approved on 25 February 2009
 
Frequency. Standard frequency source, 5 MHz
Relative expanded uncertainty (k = 2, level of confidence 95 %) in Hz/Hz: 1.0E-13
Local frequency standard
Averaging time: 2 days
Approved on 25 February 2009