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Frequency Calibrator VCH-313Frequency 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 |
≤6.0·10–10 |
≤1.0·10–10 |
≤3.0·10–11 |
| 5 MHz |
≤1.5·10–10 |
≤2.5·10–11 |
≤6.0·10–12 |
| 10 MHz |
≤3.0·10–11 |
≤5.0·10–12 |
≤1.0·10–12 |
The best frequency calibration accuracy (≤1.0·10–13) 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 supply: AC(198÷242)V, (50÷60)Hz; 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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