The VCH-1005 is a high-performance hydrogen maser with a built-in frequency comparator. Extremely high 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 recearches.
Specifications
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 | ≤3.0×10 −13 |
| 10 s | ≤3.0×10 −14 | |
| 100 s | ≤8.0×10 −15 | |
| 1 hour | ≤3.0×10 −15 | |
| 1 day | ≤3.0×10 −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 | ≤−115 | |
| 10 Hz | ≤−135 | |
| 100 Hz | ≤−145 | |
| 1000 Hz | ≤−155 | |
| Manual synchronization to external 1 pps TTL signal accuracy | ≤±50 ns | |
| Temperature sensitivity in operating temperature range (+10÷+35) °C | ≤±1×10 −15 1/°C | |
| Magnetic sensitivity | ≤±2×10 −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:
250 VA AC, 200 W DC.
Dimensions (W×H×D):
600×1585×900 mm.
Weight:
225 kg.
Warranty:
3 years.
Live time:
10 years.
