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Frequency Calibrator VCH-313

Frequency calibrator VCH-313 is intended for calibration and verification of different frequency signal sources, using precision time scale signal, transmitted by satellite navigation systems GPS/GLONASS. The instrument can provides periodical frequency correction of the calibrating frequency standard in automatic mode.

Key applications
- Verification of metrological parameters of precision frequency signals sources;
- time keeping metrology systems;
- scientific research measurements.

Specifications

Input signals serviceable for frequency calibration:
- 5 or 10 MHz, sine, 1 V into 50 Ω load;
- 2,048 MHz, pulse, (ITU-T G.703); The frequency of input signal is recognized automatically.

Frequency calibration error depends on input signal frequency "F" and measurement time "T" and is determined by formula ΔF/F=1/FT. Values of calibration errors are given in the table:

Input frequency "F" Calibration error depends from measurement time "T"
1 hour 6 hour 24 hours
2,048 MHz ≤6.0×1010 ≤1.0×1010 ≤3.0×1011
5 MHz ≤1.5×1010 ≤2.5×1011 ≤6.0×1012
10 MHz ≤3.0×1011 ≤5.0×1012 ≤1.0×1012

The best frequency calibration accuracy (≤1.0×1013) is realizing for measurement time T=10 days.
Results of calibration in relative units are available on the display at the front panel of the indtrument and remotely through interface.
Interface: RS-232; USB.
Power: AC 220 V, 50 Hz ; or DC: (38.4÷57.6) V.
Power consumption: ≤25 W.
Start up time: ≤25 min.
Dimensions (W×H×D): (without antenna and a cable) 240×140×330 mm.
Antenna: dimensions 185×∅181 mm. Weight 0,5 kg. Antenna cable's lenght is 60 m.
Weight: 4.5 kg.
Warranty: 3 years.
Live time:15 years.

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