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Manufacturer

Vremya-CH

67, Osharskaya Str., 603105, Nizhny Novgorod, Russia

vremya-ch@made-in-zelenograd.com

Active Hydrogen Frequency Standard VCH-1003A

VCH-1003A Hydrogen Frequency and Time Standard provides the highest frequency stable output signals with the following characteristics:

  • Frequency (MHz) 5; 100.
  • Voltage at 50 Ohm load (Vrms) 1 0.2.
  • 1 PPS pulse, pulse width 20 10 s, rise time <10 ns, positive polarity, TTL level at 50 Ohm load. Synchronization to external 1 PPS TTL signal with 50 ns accuracy.
Frequency accuracy (factory calibration)5x10-13
Frequency corrector:
resolution1x10-14
range1x10-10
Frequency instability (Allan variance) not more:
1 s<2x10-13
10 s<2x10-14
100 s<7x10-15
3600 s<2x10-15
1 day<2x10-15
Phase noise (dB/Hz) (at the 5 MHz output):
10 Hz-130
100 Hz-140
1000 Hz-150
Magnetic sensitiveness, (1/Oersted)<1x10-14
Frequency temperature coefficient, (1/C)<5x10-15
Operating temperature range, (C)+5 to +35
Power consumption: 220 V 50 Hz AC (VA)150
Dimensions (mm)550x990x550
Weight (kg)85

Full data monitoring and functions control (local or remote through any network) are performed by personal computer (not included in delivery set).

Application software running under Microsoft Windows is applied.

Anticipated life time - 10 years.

Active Hydrogen Frequency Standard VCH-1005

VCH-1005 Hydrogen Frequency and Time Standard provides the highest frequency stable 5 MHz, 100 MHz and 1 Hz (time scale) output signals with the following characteristics:

Frequency accuracy (factory calibration)5x10-13
Frequency corrector:
resolution1x10-14
range1x10-10
Frequency stability (Allan variance at 25C, environ-mental effects are excluded)
1 s< 3x10-13
10 s< 3x10-14
100 s< 8x10-15
1000 s< 3x10-15
1 day< 3x10-15
Phase noise (dB/Hz) (at the 5 MHz output):
10 Hz< -125
100 Hz< -140
1000 Hz< -150
Magnetic sensitiveness, (1/Oersted)< 2x10-14
Frequency temperature coefficient, (1/C)< 1x10-14
Operating temperature range, (C)+5 to +40
Power consumption: 220 V 50 Hz AC (VA)250

Output signal frequency (MHz): 5, 100

Voltage (rms.) at 50 Ohm load (V): 1 0.2

Time scale - 1 Hz pulse, pulse width 20 10 s, rise time < 10ns, positive polarity TTL level at 50 Ohm load.

Manual synchronization to external 1 pps TTL signal with 50 ns accuracy.

Full data monitoring and functions control (local or remote through any network) performs by personal computer (not includes in delivery set).

Application software running under Microsoft Windows' 9x, 2000, XP, is applied.

Expecting lifetime - 10 years.

Passive Hydrogen Frequency Standard VCH-1006

VCH-1006 Passive Hydrogen Frequency and Time Standard is a new VREMYA-CH product for using as a precision frequency reference sourse with the following characteristics:

Output signals:

  • 5, 10 and 100 MHz sin, (1 0.2) V rms at 50 Ohm;
  • 2.048 MHz pulse, (1.5 to 2.8) V pp at 75 Ohm;
  • 1 PPS pulse, positive polarity TTL level at 50 Ohm. Manual synchronization to external 1 pps TTL signal with 50 ns accuracy.
Frequency accuracy (factory calibration)5x10-13
Frequency accuracy due to environment influence1x10-14
Frequency corrector:
resolution1x10-15
retuning range1x10-10
Frequency stability (Allan variance at 25C, environ-mental effects are excluded)
1 s7x10-13
10 s2x10-13
100 s7x10-14
3600 s2x10-14
1 day7x10-15
Phase noise (dB/Hz) (at the 5 MHz output):
10 Hz-130
100 Hz-140
1000 Hz-150
Magnetic sensitiveness, (1/Oersted)< 2x10-14
Frequency temperature coefficient, (1/C)1x10-14
Operating temperature range, (C)+5 to +40
DC Magnetic field(0 to 2) Gauss
Humidityup to 80% (35 C max)
Power consumption:AC: 100-240V, 50-60 Hz, or DC: 27 V, (option DC: 48 20%)
Power consumption max (W)80

Full digital processing of modulation and servo loop signals.

Digital control and monitoring of all operating parameters on LCD display.

Internal accumulators for 10 min working.

RS-232C and LAN interfaces.

Improved reliability: warranty 3 years for the vacuum physical package of the instrument (maser itself) and 18 months for electronic units of the instrument.

Expecting lifetime - 20 years.

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