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Active Hydrogen Maser VCH-1003M

The VCH-1003M is a high-performance hydrogen maser with low phase noise output signals. Extremely high frequency stability is provided by state-of-the-art technology and internal stand-alone Cavity Auto Tuning system.

Key Applications
- National Time Keeping Service;
- Deep space tracking and navigation;
- VLBI systems;
- GNSS satellite monitoring.

Specifications

Output signals:
two outputs: 5 MHz (sine), 10.2 V RMS into 50 Ohms,
two outputs: 10 MHz (sine), 10.2 V RMS into 50 Ohms,
two outputs: 100 MHz (sine), 10.2 V RMS into 50 Ohms,
two outputs: 1 Hz (pulse) − amplitude >2.5 V into 50 Ohms, width: (155) s, rise time: <3ns.

Metrological characteristics are given in the table:
Frequency stability
(Allan deviation)
Standard Option L
3 Hz measuring
bandwidth
0.5 Hz measuring
bandwidth
3 Hz measuring
bandwidth
1 s
10 s
100 s
1000 s
1 hour
1 day*
≤1.510−13
≤2.510−14
≤610−15
≤210−15
≤1.510−15
≤510−16
≤610−14
≤1.310−14
≤3.610−15
≤1.510−15
≤1.510−15
≤5.010−16
≤810−14
≤1.410−14
≤4.010−15
≤1.510−15
≤1.510−15
≤5.010−16
Long term <3.0−16 per day**
Auto tuning no external reference required
Frequency accuracy 110−13
Temperature sensitivity ≤1.510−15/ C
Magnetic sensitivity ≤510−15/Gauss
Frequency tuning range 110−10
Setting resolution 110−16
* Specified only under laboratory conditions: at changing rate <1 C/hour ambient temperature change in 10−35 C operating temperature range.
**Achieved after 1 year of unperturbed, continuous operation.


Phase noise (SSB Phase Noise, dBc/Hz):
Standard Option L
Offset from
carrier
5 MHz 10 MHz 100 MHz 5 MHz 10 MHz 100 MHz
1 Hz ≤−118 ≤−112 ≤−92 ≤−130 ≤−121 ≤−100
10 Hz ≤−135 ≤−129 ≤−109 ≤−141 ≤−135 ≤−115
100 Hz ≤−149 ≤−143 ≤−122 ≤−151 ≤−145 ≤−125
1 kHz ≤−156 ≤−149 ≤−122 ≤−156 ≤−150 ≤−130
10 kHz ≤−158 ≤−150 ≤−152 ≤−159 ≤−153 ≤−153
100 kHz ≤−158 ≤−150 ≤−152 ≤−159 ≤−153 ≤−153

Harmonic distortion: ≤−40 dBc (for 5 MHz output).
Non-harmonic distortion: <−100 dBc in the range from 10 Hz to 10 kHz.

Full data monitoring and functions control. Application software running under Microsoft Windows and Linux (optional).

Power supply: AC(84÷264)V, (47÷60)Hz; DC(22÷30)V.
Power consumption: 150 VA (AC), 100 W (DC).
Operating temperature range: 10...35 C.
Storage temperature range: −30...50 C.
Humidity: up to 80% at 25 C.
Dimensions (W×H×D): 550×1010×550 mm.
Weight: 100 kg.
Warranty: 3 years (7 years extended).
Lifetime: 15 years.

Download manual

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"VREMYA-CH" JSC, Russia
Instruments for
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Active
Hydrogen Masers
 
 
Passive
Hydrogen Masers
 
 
Frequency
comparators
 
 
Output Signal Generators
and Distributors
 
 
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Ensemble Etalons
 
 
Telecommunication Networks
Synchronization Equipment
 
 
Documentation
Active
Hydrogen Masers
 
 
Passive
Hydrogen Masers
 
 
Documentation
Frequency
comparators
 
 
Output Signal
Generators
and Distributors
 
 
Software