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:
- 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)
Frequency accuracy due to environment influence
Frequency stability (Allan variance at 25C°,
environ-mental effects are excluded)
Phase noise (dB/Hz)
(at the 5 MHz output):
Magnetic sensitiveness, (1/Oersted)
Frequency temperature coefficient, (1/°C)
Operating temperature range, (°C)
+5 to +40
DC Magnetic field
(0 to 2) Gauss
up to 80%
(35° C max)
or DC: 27 V,
48 ± 20%)
Power consumption max (W)
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.