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Rubidium standard of time and frequency Ch1-92

Rubidium standard of time and frequency Ch1-92
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)

1 Hz pulse signal parameters:

  • output signal voltage level (positive polarity at a load of 50 Ohms), V, not less
  • pulse duration, μs -
  • duration of the leading edge of pulses, ns, not more than

 

2,4

from 20 to 40

5

Limits of permissible relative error in frequency ± 2,0⋅10 -10

Average quadratic relative two-sample
deviation of the measurement results of the
frequency of the output signals 5 and
10 MHz, not more than:

  • for a measurement time interval of 1 s
  • for a measurement time interval of 10 s
  • for a measurement time interval of 100 s

 

 

1,4⋅10 -11

5,0⋅10 -12

1,4⋅10 -12

Spectral power density of phase noise in one
side band of the spectrum of the output signal,
dB / Hz, not more than:

  • at a frequency of 10 Hz
  • at a frequency of 100 Hz
  • at a frequency of 1 kHz
  • at a frequency of 10 kHz
5 МHz 10 МHz

minus 100

minus 130

minus 140

minus 145


minus 95

minus 125

minus 140

minus 145

Attenuation of harmonic components in the
spectra of output signals 5 and 10 MHz, dB, not
less than
30
Limits of permissible absolute error of the
external synchronization of pulse signal 1 Hz, ns
± 100
Limits of permissible relative error in frequency
from on to off
± 5,0⋅10 -11
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

Operating conditions:

  • ambient temperature, °С
  • relative humidity at ambient temperature 25°С, %

 

from 5 to 40

to 90

Mean time between failures, h, not less than 25 000
Average life, years, not less than 10

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