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Calibration and Measurement Capabilities Time and Frequency 

In the CMCs uncertainty statements, the notation Q[a, b] stands for the rootsumsquare of the terms between brackets: Q[a, b] = [a^{2} + b^{2}]^{1/2} 

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Your selection : Time and Frequency

 Viet Nam, VMISTAMEQ (Viet Nam Metrology Institute, Directorate for Standards and Quality) 
 Complete CMCs in Time and Frequency for Viet Nam (.PDF file)   Frequency. Local frequency standard, 10 MHz   Relative expanded uncertainty (k = 2, level of confidence 95%) in Hz/Hz: 2.0E13   Direct frequency measurement   Gate time: 1000 s   Number of measurements: 100   Amplitude: > 0.5 V (50 )   DUT effects excluded Approved on 19 July 2010   Internal NMI service identifier: VN2.1.1 
 Frequency. Local frequency standard, 5 MHz   Relative expanded uncertainty (k = 2, level of confidence 95%) in Hz/Hz: 2.0E13   Direct frequency measurement   Gate time: 1000 s   Number of measurements: 100   Amplitude: > 0.5 V (50 )   DUT effects excluded Approved on 19 July 2010   Internal NMI service identifier: VN2.1.1 
 Frequency. Local frequency standard, 1 MHz   Relative expanded uncertainty (k = 2, level of confidence 95%) in Hz/Hz: 2.0E13   Direct frequency measurement   Gate time: 1000 s   Number of measurements: 100   Amplitude: > 0.5 V (50 )   DUT effects excluded Approved on 19 July 2010   Internal NMI service identifier: VN2.1.1 
 Time scale difference. Local clock vs UTC, 1 s to 1 s   Absolute expanded uncertainty (k = 2, level of confidence 95%) in ns: 200   Time comparison against the predicted time   1 pps amplitude: > 0.5 V (50 )   Averaging time: 5 days   Prediction time: 45 days   DUT effects excluded Approved on 19 July 2010   Internal NMI service identifier: VN1.1.2 
 Time scale difference. Local clock vs UTC(VMI), 1 s to 1 s   Absolute expanded uncertainty (k = 2, level of confidence 95%) in ns: 2   Time interval measurement   1 pps amplitude: > 0.5 V (50 )   Averaging time: 1 day   DUT effects excluded Approved on 19 July 2010   Internal NMI service identifier: VN1.1.1 
