DESCRIPTION
The Instrument is designed to:
measure high stability quartz crystal oscillators or quantum reference oscillators frequency deviation in relation to time signal frequencies formed in accordance with signals of satellite radionavigation systems GLONASS/GPS;
be used as high stability frequency sources automatically locked to satellite radionavigation systems GLONASS/GPS.
PRINCIPLE OF OPERATION
The Receiver-Comparator principle of operation is based on measurement of phase difference incursion in time domain of time scale signals formed from a built-in or an external oscillator reference frequency and standard time marks signals formed from the received and processed signals of GLONASS/GPS; and automatic locking of the built-in rubidium or external oscillators to satellite navigation system signals.
The Instrument receives GLONASS/GPS radionavigation satellite system signals.
The Instrument has the following functions:
«RECEIVER-COMPARATOR»: measures relative frequency deviation of a reference oscillator; defines in accordance with measurement results relative frequency variation of a reference oscillator, average relative frequency variation, rms relative random frequency variation of reference oscillators;
«FREQUENCY STANDARD»: forms high stability sine wave signals and main and auxiliary (delayed) time scale signals; main time scale synchronization to an external standard time scale.
SPECIFICATIONS
Relative permissible measurement error of a reference oscillator relative frequency tuning: ±1.10–12/day
Relative frequency accuracy in GLONASS/GPS spacecraft tracking mode: ±2.10–12
Output sine-wave signals: 1, 5 and 10 MHz
Output signal effective voltage at 50 Ohm load: 0.5–1.2 V
Relative rms two-sample frequency variation 2 h after switching on during operation from a built-in reference oscillator:
1 s 1.10–11
10 s 6.10–12
100 s 3.10–12
Main and auxiliary (delayed) time scale output signal parameters:
pulse repetition rate: 1 s
pulse polarity: positive
pulse width: 10–30 µs
pulse amplitude at 50±5 Ohm load: not less than 2.0 V
Auxiliary versus main scale shift range: 0–999999.99 µs with 10 ns step
Main time scale to an external standard time scale permissible synchronization accuracy: ±30 ns
Operating mode setting time: 2 h
GENERAL
Operating temperature range: 15–35 °С
Relative humidity: not more than 95 % at 25 °С
Power: 220±22 V, 50±1 Hz,
| 27 | + 3 | V |
| - 5 |
Power consumption:
in a warm-up mode (30 min) 160 VA
in a settled mode 120 VA
and not more than 110 W
Dimensions: 520х158х340 mm
Weight: 15 kg
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