RUBIDIUM REFERENCE OSCILLATORS AND RUBIDIUM FREQUENCY STANDARDS,
MEASURING EQUIPMENT, DEVELOPMENT AND PRODUCTION
Rubidium Time & Frequency Standards with measuring functions and Frequency Comparators
Frequency Comparator CHK7-1011

The Instrument is made in 3 options - CHK7-1011 , CHK7-1011/1 and CHK7-1011/2.
CHK 7-1011 is the Frequency Comparator with Rubidium Frequency Standard and GPS/GLONASS Receiver installed;
CHK 7-1011/1 is the Frequency Comparator with Rubidium Frequency Standard installed;
CHK7-1011/2 is the Frequency Comparator . All options have microPC and TFT display for automatic calculations and visualization of measuring data.

 

  • Measurements of relative frequency offset, Allan Deviance, relative frequency drift
  • Time-scale measurements
  • High-stable 10 MHz signal output
  • Impulse 1 s signal output
  • Time-scale synchronized with GPS/GLONASS Receiver output

 

The CHK7-1011 is intended for relative frequency measurements of high-stable signals by comparison them with a external reference signal or with the signal of internal Rubidium Frequency Standard. All results of measurement and automatically made calculations are presented on the color display of the Instrument .
The CHK7-1011 can test frequency stability frequency offset of Rubidium and Crystal Oscillators with 1; 5; 10; 2.048; 10.24 MHz outputs . The measurement Error is less than 2.10-12 at 1 s and 5.10-14 at 100 s averaging time.
There are internal source of the reference signal in CHK-1011 – Rubidium Frequency Standard that can be synchronized with the 1s signal from the internal GPS/GLONASS Receiver (option)

CHK7-1011 used Ethernet for connection with external PC. The serial RS-485 is available also.
All measurements can be made in mobile conditions as DC Power Supply +(27 ± 3)V can be used.


Technical Data:

1. Frequency Comparator
Value
1.1 Input Reference frequency, MHz
1, 5, 10
1.2 Input Measuring frequency, MHz
1; 2,048; 5,0; 10,0; 10.24

1.3 Max Frequency difference

± 1 Hz

1.4 Measurement Error (Allan Variance)

< 2.10-12 /1 s
< 5.10-13 /10 s
< 5.10-14/100 s
1.5 Input levels
( 1.0 ± 0.2 ) Vrms @ 50 Ohms
1.6 Warm-up-time
5 minutes
2. Internal Reference (Rubidium Frequency Standard)

2.1 Relative Frequency offset in synchronization mode (due to internal GPS/GLONASS Receiver)

± 5.10-12

2.2 Shot-Term Stability (Allan Varience)

< 1.4.10-11/1 s

< 5.10-12/10 s
2.3 Warm-up time
2 hours
3. General
3.1 Micro РС/104- Plus 300 MHz.
3.2 Color 6.4” TFT display.
   
4. Supply voltage
220 V AC; +(22 30) V DC
5. Power supply
60 W max
6. Connection to an external PC
Ethernet , RS -485
7. Size, mm
310 х 255 х 170
8. Weight, kg
5.0 7.0