Rubidium standard of time and frequency Ch1-92
Designed for
generation of highly stable signals with a frequency of 5 and 10 MHz, as well as a 1 Hz pulse signal with the possibility of its external synchronization
In terms of design the standard is made in the form of a monoblock, on the front panel of which control elements for synchronization mode are located, as well as LEDs of indication of standard state.
The following interfaces are available on the rear panel:
- output signal connectors 1 Hz, 5 and 10 MHz;
- connectors for input synchronizing signal 1 Hz (50 Ohm);
- AC power connector 220 V;
- RS-232 connector for adjustments to the actual frequency value is located on the front panel.
Functionally, the standard consists of an integrated rubidium reference generator, frequency divider block, buffer amplifier block, power supply.
The standard has an external synchronization mode of a pulse signal 1 Hz.
| Nominal frequencies of output signals, Hz | 1; 5·10 6; 1·10 7 | ||
| Root mean square of voltage of output signals 5 and 10 MHz at load of 50 Ohms, V | (1,0 ± 0,2) | ||
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1 Hz pulse signal parameters:
|
2,4 from 20 to 40 5 |
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| Limits of permissible relative error in frequency | ± 2,0⋅10 -10 | ||
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Average quadratic relative two-sample
|
1,4⋅10 -11 5,0⋅10 -12 1,4⋅10 -12 |
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Spectral power density of phase noise in one
|
5 МHz | 10 МHz | |
|
minus 100 minus 130 minus 140 minus 145 |
minus 95 minus 125 minus 140 minus 145 |
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Attenuation of harmonic components in the spectra of output signals 5 and 10 MHz, dB, not less than |
30 | ||
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Limits of permissible absolute error of the external synchronization of pulse signal 1 Hz, ns |
± 100 | ||
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Limits of permissible relative error in frequency from on to off |
± 5,0⋅10 -11 | ||
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Additional relative frequency change at change in ambient temperature in the working temperature range |
± 3,0⋅10 -10 | ||
| Feeding voltage from AC supply by frequency (50±1) Hz, V | from 198 to 242 | ||
| Consumed power, В·A, not more than | 100 | ||
| Overall dimensions (length × width × height), mm | 330 × 240 × 140 | ||
| Weight, kg, not more than | 4,0 | ||
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Operating conditions:
|
from 5 to 40 to 90 |
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| Mean time between failures, h, not less than | 25 000 | ||
| Average life, years, not less than | 10 | ||
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