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Hydrogen Masers > Passive Hydrogen Maser VCH-1008 new (in development) |
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Passive Hydrogen Maser VCH-1008 new
(in development) |
| VCH-1008 Passive Hydrogen Maser is a small size hydrogen maser with the best frequency stability. Extremely high frequency stability is provided by state-of-the-art technology. Full digital processing of modulation and servo loop signals is realized. Ideal for high-accuracy measurements applications. Internal GPS/GLONASS calibrator (option) supports permanent automatic output signals frequency calibration. |
Key Applications
- National Time Keeping Service;
- Space tracking and navigation;
- Verification of metrological parameters of frequency signals sources;
- Scientific researches.
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| Specifications |
Output signals
- Sine:5 MHz; 10 MHz; 100 MHz, (1 ± 0.2) 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 (10 ± 0.1) μs, TTL level into 50 Ω,
- rise time: < 10 ns.
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| Metrological characteristics are given in the table: |
| Relative frequency accuracy |
±3×10e-13
(factory calibration) |
≤±1×10e-13
(in option with GPS/GLONASS calibrator) |
| Output signals frequency corrector |
resolution
retuning range |
1×10e-15
1×10e-10 |
Frequency stability
(Allan deviation at (25±1)C°, environmental
effects are excluded) |
1 s |
≤5.0×10e-13 |
10 s |
≤2.0×10e-13 |
100 s |
≤5.0×10e-14 |
1 hour |
≤9.0×10e-15 |
1 day |
≤4.0×10e-15 |
Phase noise spectral density (dBc/Hz)
(5 MHz output) |
Frequency offset |
Spectral density |
1 Hz |
≤−105 |
10 Hz |
≤−130 |
100 Hz |
≤−145 |
1000 Hz |
≤−155 |
Manual synchronization to external
1 pps
TTL signal |
≤±25 ns |
| Time synchronization to UTC using GPS |
≤±50 ns(in option with GPS calibrator) |
| Temperature sensitivity in operating temperature range (+5÷+35)C° |
≤±2×10e-14 1/C° |
| Magnetic sensitivity |
≤±2×10e-14 1/Oersted |
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Digital control and monitoring all operating parameters on LCD display or remotely.
Interface: RS-232C; USB; LAN.
Power: AC, 100–240 V, 50-60 Hz, or DC, (22~30) V.
Power consumption: 120 VA AC, 100 W DC.
Options: 1. DC power supply - (38, 4 – 57, 6) V (two inputs); 2. Internal battery for 4 hours autonomous operation; 3. Internal GPS calibrator for automatic output signals frequency calibration.
Dimensions (WxHxD): 470 mm×200 mm×530 mm.
Weight: 33 kg.
Warranty: 3 years.
Life time: 15 years.
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