Quartzlock time and frequency standards offer a complete range of cost effective and low noise in both atomic controlled (rubidium oscillator) and GPS controlled time and frequency reference, calibrators and standards. These accurate time and frequency references are used in telecoms, aviation, nautical and precision test and measurement environments. Time and Frequency Standards are precision references against which the “device under test” may be calibrated. These are used by Laboratories, Calibration houses and similar environments from National Measurement Institute (NMI) to Industrial facilities that support production test and quality control.