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, (1±0.3) 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 part15).
1Hz; positive polarity pulse, width 100±0.01; 10±0.01; 1±0.01; 0,1±0.01 μs, TTL level into 50 Ω, rise time: <15 ns.
| Relative frequency accuracy (without auto-tuning) | ±1×10 −11 | |
|---|---|---|
| Relative frequency accuracy (in auto-tuning mode using embedded GNSS receiver) | ±1×10 −12 | |
| Output signals frequency corrector |
resolution
retuning range |
1·10
−15
1·10 −10 |
|
Frequency stability
(Allan variance at (25±1)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 | |
| MTIE and TDEV without auto-tuning (comply with the 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 | Time interval t(s) | TDEV (ns) |
| 0.1< t ≤100 | 3 | |
| 100< t ≤1000 | 0.03t | |
| 1000< t ≤10000 | 30 | |
| MTIE and TDEV in auto-tuning mode using embedded GNSS receiver (comply with the requirements of ITU-T G.811.1) | ||
| Maximum Time Interval Error | Time interval t(s) | MTIE (ns) |
| 0.1< t ≤1 | 0.004 | |
| 1< t ≤100 | 0.11114×10 −3 t+0.00389 | |
| 100< t ≤1000 | 0.0375×10 −6 t+0.015 | |
| t>1000 | 10 −6 t+0.0140375 | |
| Time Deviation | Time interval t(s) | TDEV (ns) |
| 0.1< t ≤10000 | 1 | |
|
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.
Interface:
RS-232C; USB; LAN .
Power supply:
AC (100÷240) V, (50÷60) Hz; DC (40÷72) V, two inputs.
Power consumption:
80 W.
Dimensions (W×H×D):
483×200×550 mm.
Weight:
30 kg.
Warranty:
3 years (10 years extended).
Life time:
15 years.
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