Time Interval Mete, Signal Generator, Time Interval Generator, Cesium Beam Frequency Standard, Rubidium Frequency Standard, High Stability Quartz Crystal Oscillator, Frequency Comparator, Frequency Counter, Time Synthesizer, etc
| № |
Name of measuring instrument |
Parameter |
Category/ Typical
model |
Name,
Code of calibration regulation |
Measuring
range |
Best
Measurement Capability Expanded As An uncertainty |
| 1 |
Frequency standards |
Frequency accuracy Frequency stability Frequency drift in certain period Frequency reproducibility Aging rate |
Cesium Beam Frequency Standard Rubidium Frequency Standard High Stability Quartz Crystal Oscillator |
JJG 492-87 <Verification Regulation of
Cesium Beam Frequency Standard> JJG 292-1996 <Verification Regulation of
Rubidium Frequency Standard> JJG 181-89 <Verification Regulation of
High Stability Quartz Crystal Oscillator> |
100kHz、1MHz、 5MHz、10MHz |
5.6×10-13 |
| 2 |
Frequency Counters |
Crystal
Oscillator： Frequency accuracy Frequency stability Frequency drift in certain period Frequency change in one day Frequency
reproducibility |
Universal Counters Microwave Frequency Counters |
JJG 349-2001 <Verification Regulation of
Universal Counters> JJG 841-93 <Verification Regulation of
Microwave Frequency Counters> |
0-18GHz |
5.6×10-13 |
| 3 |
Signal Generator (Frequency) |
Crystal
Oscillator： Frequency accuracy Frequency stability Aging rate |
Signal Generator Frequency Synthesizer |
JJG 502-87 <Verification Regulation of
Frequency Synthesizer> |
0-18GHz |
5.6×10-13 |
| 4 |
Frequency Comparator |
Frequency stability |
Frequency Comparator |
JJG 545-88 <Verification Regulation of Frequency Comparator > |
100kHz、1MHz、 5MHz、10MHz |
1.0×10-12/s |
| 5 |
Time Synthesizer |
Delay time |
Time Synthesizer |
JJG 803-1993 <Verification Regulation of
Time Synthesizer> |
±
(1ns～10000s) |
(1ns～10s):0.58ns (10～1000)s:6.2ns |
| 6 |
Time Interval Meter |
Time interval measurement |
Time Interval Meter |
JJG 953-2000 <Verification Regulation of
Precision Time Interval Meter> |
±
(1ns～10000s) |
(1ns～1s):1.1ns (1～1000)s:13ns |
