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GPS/GLONASS Disciplined Rb Oscillator VCH-311GPS/GLONASS disciplined rubidium frequency standard model VCH-311 contains multi-channel GPS/GLONASS receiver, time scale comparison unit and automatically adjustable Rubidium reference oscillator. The instrument is intended to use as a high stable frequency signal source (STANDARD mode), or precision frequency calibrator for any external standard signals (CALIBRATOR mode).
Key Applications
- Verification of metrological parameters of precision frequency signals sources;
- time keeping metrology systems;
- scientific research measurements.
Specifications
Output signals:
- Sine: 5 and 10 MHz, sine, 1 V into 50 Ω load;
- 2.048 MHz, pulse, (ITU-T G.703);
- 1 Hz, pulse, TTL levels into 50 Ω load, (1 pps GPS/GLONASS receiver output).
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).
Metrological characteristics are given in the table:
| Relative frequency accuracy in STANDARD mode |
≤±3·10−12 |
| Time accuracy from UTC/UTC SU, (RMS) |
≤100 ns |
| Relative accuracy versus warm up time |
3 h |
≤±2.0·10−11 |
| 9 h |
≤±7.0·10−12 |
| 24 h |
≤±3.0·10−12 |
Allan deviation of output signal 10 MHz
for average time τ |
τ=1 s |
≤1.5·10−11 |
| τ=1 day |
≤2.0·10−12 |
Frequency calibration error in the
CALIBRATOR mode for average time τ
and measuring time |
τ=100 s; T=105 s |
≤1.0·10−12 |
| τ=1000 s; T=106 s |
≤1.0·10−13 |
Digital control and monitoring all operating parameters on LSD display.
Interface: RS-232C; USB.
Power supply: AC(198÷242)V, (50÷60)Hz; DC(38.4÷57.6)V.
Power consumption: 45 W in normal conditions (85 W warm up time 1 hour).
Dimensions (W×H×D): 483×133×310 mm.
Antenna: dimensions 185x∅181 mm. Weight 0.5 kg. Antenna cable's lenght is 60 m.
Weight: 10 kg.
Warranty: 3 years.
Live time:15 years.
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