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Primary reference source VCH-1008C

VCH-1008C Primary Reference Source on the base of Passive Hydrogen Maser is intended to be used as the first class SDH synchronization equipment of digital telecommunication networks. Full digital processing of modulation and servo loop signals is realized. Extremely high frequency stability is provided by state-of-the-art technology.

Key applications.
Digital SDH networks clock synchronization.

Specifications
Output signals:
Sine: 5 MHz; 10 MHz; 100 MHz, (10.2) V RMS into 50 Ω load.
Pulse: 2.048 MHz (square pulse), (1.5÷2.8) V (pp) into 75 Ω (ITU-T G.703 part13).
1Hz; 1/60 Hz, positive polarity pulse, width (100.1) μs, TTL level into 50 Ω, rise time: <10 ns.

Metrological characteristics are given in the table:
Relative frequency accuracy 3×10−13
(factory calibration)
Accuracy (over environment) ≤1×10−12
Output signals frequency corrector resolution
retuning range
1×10−15
1×10−10
Frequency stability
(Allan variance at (251)C, environmental
effects are excluded)
1 s ≤1.0×10−12
10 s ≤3.0×10−13
100 s ≤1.0×10−13
1 hour ≤3.0×10−14
1 day ≤2.0×10−14
Time errors requirements of ITU-T G.811 / 6.1 and ETS 300 462-6 / 5.1.
Maximum Time Interval Error Time interval t(s) MTIE (ns)
0,1< t ≤1000 0.275t+25
t>1000 0.01t+290
Time Deviation Error Time interval t(s) TDEV (ns)
0.1< t ≤100 3
100< t ≤1000 0.03t
1000< t ≤10 30
Manual synchronization to external 1 pps
TTL signal accuracy
≤50 ns
Magnetic sensitivity ≤2×10−14 1/Oersted

Full digital processing of modulation and servo loop signals.
Digital control and monitoring all operating parameters on LCD display.
Interface: RS-232C; USB; LAN .
Power: AC:100240 V, 5060 Hz, or DC: (38.457.6) V, two inputs.
Power consumption: 80 W.
Dimensions (W×H×D): 470 mm×200 mm×530 mm.
Weight: 30 kg.
Warranty: 3 years.
Life time: 15 years.

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"VREMYA-CH" JSC, Russia
Instruments for
Space Applications
 
 
Active
Hydrogen Masers
 
 
Passive
Hydrogen Masers
 
 
Frequency
comparators
 
 
Output Signal Generators
and Distributors
 
 
Atomic Clock
Ensemble Etalons
 
 
Telecommunication Networks
Synchronization Equipment