The VCH-1003A is a high-performance hydrogen maser with built-in frequency comparator. Extremely frequency stability is provided by state-of-the-art technology. Ideal for high-accuracy measurement applications, particularly, in metrology.
Key applications
:
– National Time Keeping Service;
– deep space tracking and navigation;
– VLBI systems;
– scientific researches.
Specification
Output signals:
– Sine: 5 MHz; 10 MHz; 100 MHz; (1±0.2) V RMS into 50 Ω load;
– Pulse: 1 Hz (pps), positive polarity, amplitude: >2.5 V into 50 Ω load;
– width: 15±5 µs; rise time: <10 ns.
Metrological characteristics are given in the table:
| Relative frequency accuracy |
±3·10
−13
(factory calibration) |
|
|---|---|---|
| Output signals frequency corrector |
resolution
returning range |
1·10
−15
1·10 −10 |
| Frequency stability (Allan deviation at (25±1)°C, environmental effects are excluded) | 1 s | ≤2.0·10 −13 |
| 10 s | ≤2.0·10 −14 | |
| 100 s | ≤7.0·10 −15 | |
| 1000 s | ≤3.0·10 −15 | |
| 1 hour | ≤1.5·10 −15 | |
| 1 day | ≤2.0·10 −15 | |
| Long term frequency stability |
<1.0·10
-15
/day
Achieved in cavity autotuning mode together with another identical maser. |
|
|
Phase noise spectral density (dBc/Hz)
(5 MHz output) |
Frequency offset | Spectral density |
| 1 Hz | ≤−118 | |
| 10 Hz | ≤−135 | |
| 100 Hz | ≤−149 | |
| 1000 Hz | ≤−156 | |
| Manual synchronization to external 1 pps TTL signal accuracy | ≤±50 ns | |
| Temperature sensitivity in operating temperature range (+10÷+35) °C | ≤±3·10 −15 1/°C | |
| Magnetic sensitivity | ≤±1·10 −14 1/Oersted | |
Full data monitoring and functions control
(local or remote through any network) performs by personal computer.
Software
running under Microsoft Windows 2000, XP, Vista 7 is applied.
Power:
220 V, 50 Hz AC; or (22÷30) V DC.
Power consumption:
150 VA AC, 100 W DC.
Dimensions (W×H×D):
550×990×550 mm.
Weight:
95 kg.
Warranty:
3 years.
Live time:
15 years.
