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 | ≤6.0·10 −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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