GPS/GLONASS Disciplined Rb Oscillator VCH-311

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GPS/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=10 5 s ≤1.0·10 −12
τ=1000 s; T=10 6 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.