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Germany, PTB (Physikalisch-Technische Bundesanstalt)
Complete CMCs in Time and Frequency for Germany (.PDF file)
Time scale difference. Local clock vs UTC(PTB), -1 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ns: 2
Time interval measurement
Pulse amplitude: > 1 V
Fractional part of modulo 1 second difference, integer part can be provided also.
Approved on 21 April 2005
Internal NMI service identifier: PTB/1
 
Time scale difference. Local clock vs UTCs, -1 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ns: 40
Time interval measurement
Pulse amplitude: > 1 V
Prediction time: 20 days
Fractional part of modulo 1 second difference, integer part can be provided also.
Comparison against predicted UTC. Approved on 21 April 2005
Internal NMI service identifier: PTB/2
 
Time scale difference. Local clock vs UTC, -1 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ns: 5
Time interval measurement, post processed
Pulse amplitude: > 1 V
Fractional part of modulo 1 second difference, integer part can be provided also.
Approved on 21 April 2005
Internal NMI service identifier: PTB/3
 
Time scale difference. Remote clock vs UTC(PTB), -1 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ns: 10
GPS single channel common view
Averaging time: 1 day
Fractional part of modulo 1 second difference, integer part can be provided also.
Approved on 21 April 2005
Internal NMI service identifier: PTB/4
 
Time scale difference. Remote clock vs UTC, -1 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ns: 42
GPS single channel common view
Averaging time: 1 day
Prediction time: 20 days
Fractional part of modulo 1 second difference, integer part can be provided also.
Comparison against predicted UTC. Approved on 21 April 2005
Internal NMI service identifier: PTB/5
 
Time scale difference. Remote clock vs UTC, -1 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ns: 10
GPS single channel common view measurement, post processed
Averaging time: 1 day
Fractional part of modulo 1 second difference, integer part can be provided also.
Approved on 21 April 2005
Internal NMI service identifier: PTB/6
 
Frequency. General frequency source, 0.5 GHz to 26.5 GHz
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in Hz: 2
Direct frequency measurement
Averaging time: > 1 h
Approved on 21 April 2005
Internal NMI service identifier: PTB/20
 
Time interval. Period source, 1E-08 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ps: 200
Time interval counter
Slewing rate: 0.5 V/ns
Uncertainty based on counter specifications.
Approved on 21 April 2005
Internal NMI service identifier: PTB/21
 
Time interval. Time difference source, 1E-08 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ns: 2
Double channel time interval counter
Slewing rate: 0.5 V/ns
Uncertainty based on counter specifications; double channel.
Approved on 21 April 2005
Internal NMI service identifier: PTB/22
 
Time interval. Pulse width source, 1E-08 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ps: 200
Single channel time interval counter
Slewing rate: 0.5 V/ns
Uncertainty based on counter specifications.
Approved on 21 April 2005
Internal NMI service identifier: PTB/23
 
Time interval. Time difference meter, 1E-08 s to 1 s
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ns: 2
Time interval measurement
Slewing rate: 0.5 V/ns
Signals supplied locally.
Approved on 21 April 2005
Internal NMI service identifier: PTB/24
 
Frequency. Local frequency standard, 5 MHz
Relative expanded uncertainty (k = 2, level of confidence 95 %) in Hz/Hz: 3.5E-14
Phase time measurement
Averaging time: 1 day
Approved on 21 April 2005
Internal NMI service identifier: PTB/7
 
Frequency. Local frequency standard, 5 MHz
Relative expanded uncertainty (k = 2, level of confidence 95 %) in Hz/Hz: 3E-13
Phase time measurement
Averaging time: 1000 s
Approved on 21 April 2005
Internal NMI service identifier: PTB/8
 
Frequency. Local frequency standard, 10 MHz
Relative expanded uncertainty (k = 2, level of confidence 95 %) in Hz/Hz: 3.5E-14
Phase time measurement
Averaging time: 1 day
Approved on 21 April 2005
Internal NMI service identifier: PTB/9
 
Frequency. Local frequency standard, 10 MHz
Relative expanded uncertainty (k = 2, level of confidence 95 %) in Hz/Hz: 3E-13
Phase time measurement
Averaging time: 1000 s
Approved on 21 April 2005
Internal NMI service identifier: PTB/10
 
Frequency. Local frequency standard, 5 MHz
Relative expanded uncertainty (k = 2, level of confidence 95 %) in Hz/Hz: 4E-13
Frequency difference multiplication
Averaging time: 1 s
Relative frequency difference: < 1E-11
Frequency instability measurement.
Approved on 21 April 2005
Internal NMI service identifier: PTB/11
 
Frequency. Local frequency standard, 100 MHz
Relative expanded uncertainty (k = 2, level of confidence 95 %) in Hz/Hz: 4E-13
Frequency difference multiplication
Averaging time: 1 s
Relative frequency difference: < 1E-11
Frequency instability measurement.
Approved on 21 April 2005
Internal NMI service identifier: PTB/12
 
Frequency. Local frequency standard, 5 MHz
Relative expanded uncertainty (k = 2, level of confidence 95 %) in Hz/Hz: 1E-14
Frequency difference multiplication
Averaging time: 100 s
Relative frequency difference: < 1E-11
Frequency instability measurement.
Approved on 21 April 2005
Internal NMI service identifier: PTB/13
 
Frequency. Local frequency standard, 100 MHz
Relative expanded uncertainty (k = 2, level of confidence 95 %) in Hz/Hz: 1E-14
Frequency difference multiplication
Averaging time: 100 s
Relative frequency difference: < 1E-11
Frequency instability measurement.
Approved on 21 April 2005
Internal NMI service identifier: PTB/14
 
Frequency. Local frequency standard, 5 MHz
Relative expanded uncertainty (k = 2, level of confidence 95 %) in Hz/Hz: 4E-15
Frequency difference multiplication
Averaging time: 10000 s
Relative frequency difference: < 1E-11
Frequency instability measurement.
Approved on 21 April 2005
Internal NMI service identifier: PTB/15