Transportable hydrogen quantum clock PKVCH-M «SAPFIR»

The transportable hydrogen quantum clock, developed by VNIIFTRI, is based on a small-sized active hydrogen generator with a storage vessel made of single-crystal leucosapphire.
Small-sized, cost-effective, has high metrological characteristics, can function in harsh operating conditions, transportation by all means of transport in working condition is possible.

DESIGNED FOR
– Time scale comparison of geographically dispersed objects;
– Time scale formation and storage;
– Precision signal formation with frequencies 5 MHz, 10 MHz, 100 MHz.

PURPOSE AND APPLICATION
Measuring the difference of time scales of spatially separated standards of time located at a distance of up to 1000 km with an error of not more than 2 ns;
measuring the frequency of the reference signals of remote standards, as well as determining the instability parameters of their frequencies and spectral characteristics of the signals;
storage of a time scale and a source of reference precision signal at mobile and stationary objects.

SPHERES OF APPLICATION
Metrology, research in the field of time and frequency, telecommunications.

Output signals

100 MHz Sinusoidals, RH = 50 Ohm Urms= (1.0 ± 0.2) V
10 MHz
5 MHz
1 Hz Positive polarity pulses, RH = 50 Ohm Um= 3.5 V

tИ =10 µs

τф = 3 ns

 

Output frequency tuning range  ±1•10-9 with step 1•1015

 

OUTPUT FREQUENCY INSTABILITY (RMSD):

 

TIME OF MEASUREMENT RMSD
1 s 5•10-13
10 s 1•10-13
100 s 3•10-14
1000 s 8•10-15
3600 s 5•10-15
24 h 4•10-15
Error of storage of a time scale during transportation time of 24 h and running time of 12 h not more than 2 ns
Operating temperature range +(5÷40)°С
Temperature frequency coefficient TFC ≤ 3•10-15 1/К
Frequency magnetic coefficient FMC ≤ 4•10-15 1/Э

 

Electric power supply:
from AC mains by voltage 100÷240 V (48 – 440 Hz)
from DC mains by voltage 10 ÷ 36 V

 

Consumed power:
when warming up and charging the battery not more than 200 Wt
in a heated state (at + 20 °С) not more than 100 Wt
Independent operation time from accumulator battery not less than 3 hours
Weight 75 kg