VCH-1006 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.
Key applications:
– National Time Keeping Service.
– Space tracking and navigation.
– Verification of metrological parameters of frequency signals sources.
– Scientific research.
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, positive polarity pulse, width (15±5) μs, TTL level at 50 Ω, rise time: <15 ns.
Metrological characteristics are given in the table:
| Relative frequency accuracy | ±3·10 –13 (factory calibration) | |
|---|---|---|
| Output signals frequency corrector |
resolution
tuning range |
1·10
−15
1·10 −10 |
| Frequency stability (Allan deviation at 25±1C°, environmental effects are excluded) | 1 s | ≤7.0·10 −13 |
| 10 s | ≤2.0·10 −13 | |
| 100 s | ≤7.0·10 −14 | |
| 1 hour | ≤2.0·10 −15 | |
| 1 day | ≤7.0·10 −15 | |
| Phase noise spectral density (dBc/Hz) (5 MHz output) | Frequency offset | Spectral density |
| 1 Hz | ≤−110 | |
| 10 Hz | ≤−130 | |
| 100 Hz | ≤−145 | |
| 1000 Hz | ≤−155 | |
| Manual synchronization to external 1 pps TTL signal accuracy | ≤±50 ns | |
| Temperature sensitivity in temperature operating range (+5÷+35 C°) | ≤±2·10 −14 1/C° | |
| Magnetic sensitivity | ≤±2·10 −14 1/Oersted | |
Digital control and monitoring:
all operating parameters on local LCD display or remotely.
Interface:
RS-232C.
Power:
AC, (100÷240)V, (50÷60)Hz, or DC, (27
+3
-5
)V.
Power consumption:
120 VA AC, 80 W DC.
Dimensions (W×H×D):
470 mm×200 mm×530 mm.
Weight:
31 kg.
Warranty:
3 years.
Life time:
15 years.
