Passive hydrogen maser CH1-1007 successfully passed calibration procedure in Russian Metrological Institute of Technical Physics and Radio Engineering (FSUE «VNIIFTRI»). Measured average values of relative frequency difference and frequency stability (Allan deviation) drastically outperforms the values declared in the specification. Calibration certificate approves high accuracy of the instrument. Passive hydrogen maser CH1-1007 is the most mass-product instrument of Vremya-CH, it has export analog – the model VCH-1008 .
